- home
- Advanced Search
- NEANIAS Atmospheric Research Community
- Publications
- European Commission
- HAL Descartes
- NEANIAS Atmospheric Research Community
- Publications
- European Commission
- HAL Descartes
Loading
description Publicationkeyboard_double_arrow_right Article 2024 France EnglishPublisher:HAL CCSD Funded by:EC | GRASP-ACE, EC | ACTRIS IMPEC| GRASP-ACE ,EC| ACTRIS IMPAuthors: Gil-Díaz, Cristina; Sicard, Michäel; Comerón, Adolfo; Fortunato dos Santos Oliveira, Daniel Camilo; +5 AuthorsGil-Díaz, Cristina; Sicard, Michäel; Comerón, Adolfo; Fortunato dos Santos Oliveira, Daniel Camilo; Muñoz-Porcar, Constantino; Rodríguez-Gómez, Alejandro; Lewis, Jasper, R.; Welton, Ellsworth, J.; Lolli, Simone;International audience; In this paper a statistical study of cirrus geometrical and optical properties based on 4 years of continuous ground-based lidar measurements with the Barcelona (Spain) Micro Pulse Lidar (MPL) is analysed. First, a review of the literature on the two-way transmittance method is presented. This method is a well-known lidar inversion method used to retrieve the optical properties of an aerosol–cloud layer between two molecular (i.e. aerosol and cloud-free) regions below and above, without the need to make any a priori assumptions about their optical and/or microphysical properties. Second, a simple mathematical expression of the two-way transmittance method is proposed for both ground-based and spaceborne lidar systems. This approach of the method allows the retrieval of the cloud optical depth, the cloud column lidar ratio and the vertical profile of the cloud backscatter coefficient. The method is illustrated for a cirrus cloud using measurements from the ground-based MPL and from the spaceborne Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). Third, the database is then filtered with a cirrus identification criterion based on (and compared to) the literature using only lidar and radiosonde data. During the period from November 2018 to September 2022, 367 high-altitude cirrus clouds were identified at 00:00 and 12:00 UTC, of which 203 were successfully inverted with the two-way transmittance method. The statistical results of these 203 high-altitude cirrus clouds show that the cloud thickness is 1.8 ± 1.1 km, the mid-cloud temperature is −51 ± 8 ∘C and the linear cloud depolarization ratio is 0.32 ± 0.13. The application of the transmittance method yields an average cloud optical depth (COD) of 0.36 ± 0.45 and a mean effective column lidar ratio of 30 ± 19 sr. Statistical results of the errors associated with the two-way transmittance method retrievals are also provided. The highest occurrence of cirrus is observed in spring and the majority of cirrus clouds (48 %) are visible (0.03 0.3) with a percentage of 38 %. Together with results from other sites, possible latitudinal dependencies have been analysed together with correlations between cirrus cloud properties. For example, we noted that in Barcelona the COD correlates positively with the cloud base temperature, effective column lidar ratio and linear cloud depolarization ratio and negatively with the cloud base height.
HAL Descartes arrow_drop_down HAL DescartesArticle . 2024Full-Text: https://hal.science/hal-04467248/documentData sources: HAL DescartesAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______3379::30f3c47860e6418a1a5be971c8aa69ec&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert HAL Descartes arrow_drop_down HAL DescartesArticle . 2024Full-Text: https://hal.science/hal-04467248/documentData sources: HAL DescartesAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______3379::30f3c47860e6418a1a5be971c8aa69ec&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint 2024 FrancePublisher:Elsevier BV Funded by:EC | CAFEEC| CAFEAuthors: Starck, Thomas; Fardet, Tanguy; Esculier, Fabien;Starck, Thomas; Fardet, Tanguy; Esculier, Fabien;Nitrogen (N) is essential for plant growth and protein synthesis but global reactive N losses, mainly from food systems, induce strong environmental impacts.N losses after human excretion are often overlooked because, in Western societies, they partly occur as inert N2, following denitrification in wastewater treatment plants (WWTP), and losses in waters are often small compared to diffuse agricultural emissions.Yet N from human excretions could be used for crop fertilization, potentially with very high recycling rates via source separation.In this study we use unique operational data from the ~20,000 French WWTPs to produce a N mass-balance of excretions in the French sanitation system.Even though 75% of WWTPs' sludge is spread on crops, only 10% of the excreted N is recycled and 50% of N is lost to the atmosphere, mainly through WWTP nitrification-denitrification.The remaining 40% ends up in water or in diffuse losses in the ground, of which about half is lost outside of the WWTPs' discharge system, through sewers storm water and individual autonomous systems.While WWTPs removal efficiency increased in the 2000s, it has been followed by a decade of stagnation, reaching 70% at the national level.This national average hides regional discrepancies, from 60 to 85% in the 6 French water agencies basins.These differences closely correlate with the classification as ''N sensitive areas'' and is mainly due to large WWTPs which handle most of the N load.Recycling all N in excretions could supply 10% of domestic protein consumption in the current French food system, and up to 30% if it is prioritized towards crop production for human consumption.Redesigning the food system (decrease of nutrient losses, more plant-based diets) could further increase this contribution Comment: arXiv admin note: text overlap with arXiv:2310.06461
HAL Descartes; Mémoi... arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-Ecole des Ponts ParisTechArticle . 2024License: CC BY SAFull-Text: https://hal.science/hal-04232722v2/documentThe Science of The Total EnvironmentArticle . 2024 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefHAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationPreprint . 2023License: CC BY SAFull-Text: https://hal.science/hal-04232722/documenthttps://doi.org/10.48550/arxiv...Article . 2023License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.scitotenv.2023.168978&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert HAL Descartes; Mémoi... arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-Ecole des Ponts ParisTechArticle . 2024License: CC BY SAFull-Text: https://hal.science/hal-04232722v2/documentThe Science of The Total EnvironmentArticle . 2024 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefHAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationPreprint . 2023License: CC BY SAFull-Text: https://hal.science/hal-04232722/documenthttps://doi.org/10.48550/arxiv...Article . 2023License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.scitotenv.2023.168978&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 FrancePublisher:Copernicus GmbH Funded by:EC | REALISTIC, EC | D-TECT, EC | ACTRIS IMPEC| REALISTIC ,EC| D-TECT ,EC| ACTRIS IMPA. Tsekeri; A. Gialitaki; A. Gialitaki; A. Gialitaki; M. Di Paolantonio; M. Di Paolantonio; D. Dionisi; G. L. Liberti; A. Fernandes; A. Szkop; A. Pietruczuk; D. Pérez-Ramírez; D. Pérez-Ramírez; M. J. Granados Muñoz; M. J. Granados Muñoz; J. L. Guerrero-Rascado; J. L. Guerrero-Rascado; L. Alados-Arboledas; L. Alados-Arboledas; D. Bermejo Pantaleón; D. Bermejo Pantaleón; J. A. Bravo-Aranda; J. A. Bravo-Aranda; A. Kampouri; A. Kampouri; E. Marinou; V. Amiridis; M. Sicard; M. Sicard; A. Comerón; C. Muñoz-Porcar; A. Rodríguez-Gómez; S. Romano; M. R. Perrone; X. Shang; M. Komppula; R.-E. Mamouri; R.-E. Mamouri; A. Nisantzi; A. Nisantzi; D. Hadjimitsis; D. Hadjimitsis; F. Navas-Guzmán; F. Navas-Guzmán; A. Haefele; D. Szczepanik; A. Tomczak; I. S. Stachlewska; L. Belegante; D. Nicolae; K. A. Voudouri; K. A. Voudouri; D. Balis; A. A. Floutsi; H. Baars; L. Miladi; N. Pascal; O. Dubovik; A. Lopatin;Abstract. The European Aerosol Research Lidar Network (EARLINET), part of the Aerosols, Clouds and Trace gases Research Infrastructure (ACTRIS), organized an intensive observational campaign in May 2020, with the objective of monitoring the atmospheric state over Europe during the COVID-19 lockdown and relaxation period. Besides the standard operational processing of the lidar data in EARLINET, for seven EARLINET sites having collocated sun-photometric observations in the Aerosol Robotic Network (AERONET), a network exercise was held in order to derive profiles of the concentration and effective column size distributions of the aerosols in the atmosphere, by applying the GRASP/GARRLiC (from Generalized Aerosol Retrieval from Radiometer and Lidar Combined data – GARRLiC – part of the Generalized Retrieval of Atmosphere and Surface Properties – GRASP) inversion algorithm. The objective of this network exercise was to explore the possibility of identifying the anthropogenic component and of monitoring its spatial and temporal characteristics in the COVID-19 lockdown and relaxation period. While the number of cases is far from being statistically significant so as to provide a conclusive description of the atmospheric aerosols over Europe during this period, this network exercise was fundamental to deriving a common methodology for applying GRASP/GARRLiC to a network of instruments with different characteristics. The limits of the approach are discussed, in particular the missing information close to the ground in the lidar measurements due to the instrument geometry and the sensitivity of the GRASP/GARRLiC retrieval to the settings used, especially for cases with low aerosol optical depth (AOD) like the ones we show here. We found that this sensitivity is well-characterized in the GRASP/GARRLiC products, since it is included in their retrieval uncertainties.
Atmospheric Measurem... arrow_drop_down Atmospheric Measurement TechniquesArticle . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Measurement Techniques (AMT)Other literature type . 2023Data sources: Copernicus PublicationsHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04459590/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/amt-16-6025-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert Atmospheric Measurem... arrow_drop_down Atmospheric Measurement TechniquesArticle . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Measurement Techniques (AMT)Other literature type . 2023Data sources: Copernicus PublicationsHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04459590/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/amt-16-6025-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 France, ItalyPublisher:MDPI AG Funded by:EC | ACTRIS-2, EC | ATMO-ACCESS, EC | GRASP-ACE +1 projectsEC| ACTRIS-2 ,EC| ATMO-ACCESS ,EC| GRASP-ACE ,EC| ACTRIS IMPAuthors: Daniel Camilo Fortunato dos Santos Oliveira; Michaël Sicard; Alejandro Rodríguez-Gómez; Adolfo Comerón; +7 AuthorsDaniel Camilo Fortunato dos Santos Oliveira; Michaël Sicard; Alejandro Rodríguez-Gómez; Adolfo Comerón; Constantino Muñoz-Porcar; Cristina Gil-Díaz; Simone Lolli; Oleg Dubovik; Anton Lopatin; Milagros Estefanía Herrera; Marcos Herreras-Giralda;doi: 10.3390/rs15205010
International audience; The versatile Generalized Retrieval of Aerosol and Surface Properties (GRASP) algorithm exploits the advantages of synergic ground-based aerosol observations such as radiometric (sensitive to columnar aerosol optical and microphysical properties) and lidar (sensitive to vertical distribution of the optical properties) observations. The synergy is possible when the complementary data is mutually constrained by GRASP parametrization that includes, for the first time ever, the degree of linear polarization (DoLP) parameter measured by a polarized sun-sky-lunar AERONET photometer (380, 440, 500, 675, 870, 1020, and 1640 nm) in synergy with the vertical profiles from an elastic lidar (355, 532, and 1064 nm). First, a series of numerical tests is performed using simulated data generated using a climatology of data and ground-based measurements. The inversions are performed with and without random noise for five different combinations of input data, starting from the AERONET-like dataset and increasing to the complex one by adding more information for three aerosol scenarios: I—high aerosol optical depth (AOD) with dominant coarse mode; II—low AOD with dominant coarse mode; III—high AOD with dominant fine mode. The inclusion of DoLP improves (i) the retrieval accuracy of the fine-mode properties when it is not dominant; (ii) the retrieval accuracy of the coarse-mode properties at longer wavelengths and that of the fine-mode properties at shorter wavelengths; (iii) the retrieval accuracy of the coarse-mode real part of the refractive index (up to 36% reduction), but has no effect on the retrieval of the imaginary part; (iv) reduces up to 83% the bias of the sphere fraction (SF) retrieval in coarse-mode dominated regimes; and (v) the root mean square error (RMSE) of the retrieval for most of the parameters in all scenarios. In addition, the addition of more photometer channels in synergy with a three-wavelength elastic lidar reduces the RMSE for the real part (67% in the coarse mode) and the imaginary part (35% in the fine mode) of the refractive index, the single scattering albedo (38% in the fine mode), the lidar ratio (20% in the coarse mode), and the SF (43%).
Remote Sensing arrow_drop_down HAL Descartes; HAL - Université de Lille; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BYFull-Text: https://hal.science/hal-04293998/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/rs15205010&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Remote Sensing arrow_drop_down HAL Descartes; HAL - Université de Lille; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BYFull-Text: https://hal.science/hal-04293998/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/rs15205010&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 France, Italy, SpainPublisher:Copernicus GmbH Funded by:EC | ACTRIS-2, EC | ACTRIS, EC | ACTRIS IMP +1 projectsEC| ACTRIS-2 ,EC| ACTRIS ,EC| ACTRIS IMP ,EC| ACTRIS PPPS. Lolli; S. Lolli; M. Sicard; M. Sicard; F. Amato; A. Comeron; C. Gíl-Diaz; T. C. Landi; C. Munoz-Porcar; D. Oliveira; F. Dios Otin; F. Rocadenbosch; F. Rocadenbosch; A. Rodriguez-Gomez; A. Alastuey; X. Querol; C. Reche;handle: 10261/340380 , 2117/396230
Aerosols are one of the most important pollutants in the atmosphere and have been monitored for the past few decades by remote sensing and in situ observation platforms to assess the effectiveness of government-managed reduction emission policies and assess their impact on the radiative budget of the Earth's atmosphere. In fact, aerosols can directly modulate incoming short-wave solar radiation and outgoing long-wave radiation and indirectly influence cloud formation, lifetime, and precipitation. In this study, we quantitatively evaluated long-term temporal trends and seasonal variability from a climatological point of view of the optical and microphysical properties of atmospheric particulate matter at the Universitat Politècnica de Catalunya (UPC), Barcelona, Spain, over the past 17 years, through a synergy of lidar, sun photometer, and in situ concentration measurements. Interannual temporal changes in aerosol optical and microphysical properties are evaluated through the seasonal Mann-Kendall test. Long-term trends in the optical depth of the recovered aerosol; the Ångström exponent (AE); and the concentrations of PM10, PM2.5, and PM1 reveal that emission reduction policies implemented in the past decades were effective in improving air quality, with consistent drops in PM concentrations and optical depth of aerosols. The seasonal analysis of the 17-year average vertically resolved aerosol profiles obtained from lidar observations shows that during summer the aerosol layer can be found up to an altitude of 5 km, after a sharp decay in the first kilometer. In contrast, during the other seasons, the backscatter profiles fit a pronounced exponential decay well with a well-defined scale height. Long-range transport, especially dust outbreaks from the Sahara, is likely to occur throughout the year. During winter, the dust aerosol layers are floating above the boundary layer, while during the other seasons they can penetrate the layer. The analysis also revealed that intense, short-duration pollution events during winter, associated with dust outbreaks, have become more frequent and intense since 2016. This study sheds some light on the meteorological processes and conditions that can lead to the formation of haze and helps decision makers adopt mitigation strategies to preserve large metropolitan areas in the Mediterranean basin. Copyright: This research has been supported by the European Union through NextgenerationEU funds and by the following projects along the years: FP5 EARLINET project (grant no. ID EVR1-CT-1999-40003), FP6 EARLINET-ASOS (ID: 25991), FP7 ACTRIS (ID: 262254), H2020 ACTRIS-2 (ID: 654109), ACTRIS-PPP (ID: 739530), ACTRIS IMP (ID: 871115) and ATMO-ACCESS (ID: 101008004), projects of the Spanish National Research programs (grant nos. TIC 431/93, AMB96-1144-C02-01, REN2000-1907-CE, REN2000-1754-C02-02/CLI, REN2003-09753-C02-C02/CLI, REN2003-09753-C02-C CGL2008-01330-E/CLI 02/CLI, REN2002-12784-E, CGL2005-5131-E, CGL2006-27108-E/CLI, CGL2006-26149-E/CLI, CGL2007-28871-/CLI, CTM2006-27154-E/TECNO, TEC2006-07850/TCM, TEC2009-09106, TEC2012-34575, TEC2015-63832-P and PID2019-103886RB-I00), the project of the Catalan Regional Government IMMPACTE, and the ESA project (grant no. 21487/08/NL/HE). Peer reviewed
CNR ExploRA arrow_drop_down UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCAtmospheric Chemistry and Physics (ACP)Other literature type . 2023Data sources: Copernicus PublicationsAtmospheric Chemistry and Physics (ACP)Article . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefHAL DescartesArticle . 2023Full-Text: https://hal.science/hal-04459517/documentData sources: HAL Descartesadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/acp-23-12887-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert CNR ExploRA arrow_drop_down UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCAtmospheric Chemistry and Physics (ACP)Other literature type . 2023Data sources: Copernicus PublicationsAtmospheric Chemistry and Physics (ACP)Article . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefHAL DescartesArticle . 2023Full-Text: https://hal.science/hal-04459517/documentData sources: HAL Descartesadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/acp-23-12887-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 FrancePublisher:Copernicus GmbH Funded by:EC | CALCYANEC| CALCYANK. Benzerara; A. Elmaleh; M. Ciobanu; A. De Wever; P. Bertolino; M. Iniesto; D. Jézéquel; P. López-García; N. Menguy; E. Muller; F. Skouri-Panet; S. Swaraj; R. Tavera; C. Thomazo; C. Thomazo; D. Moreira;Iron and manganese are poorly soluble elements in oxic and alkaline solutions, whereas they are much more soluble under anoxic conditions. As a result, the formation of authigenic mineral phases rich in Fe and/or Mn has traditionally been viewed as diagnostic of global or local anoxic conditions. Here we reveal that some specific cyanobacteria of very small size (< 2 µm, i.e., picocyanobacteria) can biomineralize abundant, authigenic Fe(III)-, Mn(IV)- and Si-rich amorphous phases under oxic conditions in an alkaline lake in Mexico. The resulting biominerals cluster as small globules arranged as rings around the division septum of cyanobacterial cells. These rings are enveloped within an organic, likely polysaccharidic envelope and are partially preserved, at least morphologically, upon sedimentation. Based on their 16S rDNA sequence, these cyanobacteria were affiliated with the Synechococcales order. The high Fe and Mn enrichment of the biominerals questions the systematic inference of anoxic conditions based on their detection. Moreover, this process scavenges iron from the water column, an overlooked biological contribution to the Fe cycle. Finally, it reveals a new case of controlled biomineralization of Si-rich phases by bacteria.
Biogeosciences arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2023License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/bg-20-4183-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Biogeosciences arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2023License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/bg-20-4183-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Preprint , Article 2023 FrancePublisher:Copernicus GmbH Funded by:EC | ACTRIS IMP, AKA | Atmosphere and Climate Co..., EC | GRASP-ACE +1 projectsEC| ACTRIS IMP ,AKA| Atmosphere and Climate Competence Center (ACCC) / Consortium: ACCC ,EC| GRASP-ACE ,AKA| Are Biogenic Secondary Organic Aerosols Climatically Significant in the Boreal Region?X. Shang; A. Lipponen; M. Filioglou; A.-M. Sundström; M. Parrington; V. Buchard; V. Buchard; A. S. Darmenov; E. J. Welton; E. Marinou; V. Amiridis; M. Sicard; M. Sicard; A. Rodríguez-Gómez; M. Komppula; T. Mielonen;Abstract. In May–June 2019, smoke plumes from wildfires in Alberta, Canada, were advected all the way to Europe. To analyze the evolution of the plumes and to estimate the amount of smoke aerosols transported to Europe, retrievals from the space-borne lidar CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) were used. The plumes were located with the help of a trajectory analysis, and the mass of smoke aerosols were retrieved from the CALIOP observations. The accuracy of the CALIOP mass retrievals was compared with the accuracy of ground-based lidars/ceilometer near the source in North America and after the long-range transport in Europe. Overall, CALIOP and the ground-based lidars/ceilometer produced comparable results. Over North America the CALIOP layer mean mass was 30 % smaller than the ground-based estimates, whereas over Southern Europe that difference varied between 12 % and 43 %. Finally, the CALIOP mass retrievals were compared with simulated aerosol concentrations from two reanalysis models, MERRA-2 (Modern-Era Retrospective analysis for Research and Applications, Version 2) and CAMS (Copernicus Atmospheric Monitoring System). The simulated total column aerosol optical depths (AOD) and the total column mass concentration of smoke agreed quite well with CALIOP observations, but the comparison of the layer mass concentration of smoke showed significant discrepancies. The amount of smoke aerosols in the model simulations was consistently smaller than in the CALIOP retrievals. These results highlight the limitations of such models, and more specifically their limitation to reproduce properly the smoke vertical distribution. They indicate that CALIOP is a useful tool monitoring smoke plumes over secluded areas whereas reanalysis models have difficulties in representing the aerosol mass in these plumes. This study shows the advantages of space-borne aerosol lidars, e.g. being of paramount importance to monitor smoke plumes, and reveals the urgent need of future lidar missions in space.
Copernicus Publicati... arrow_drop_down https://doi.org/10.5194/egusph...Preprint . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Article . 2024 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Other literature type . 2024Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/egusphere-2023-1945&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Copernicus Publicati... arrow_drop_down https://doi.org/10.5194/egusph...Preprint . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Article . 2024 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Other literature type . 2024Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/egusphere-2023-1945&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 France, SpainPublisher:Elsevier BV Funded by:EC | EURADEC| EURADMontenegro, Luis; Samper, Javier; Mon, Alba; de Windt, Laurent; Samper, Aurora-Core; García, Enrique;handle: 2183/33897
[Abstract:] The assessment of the long-term performance of the engineered barrier systems of high-level radioactive waste (HLW) repositories requires the use of reactive transport models. Here a non-isothermal reactive transport model of the long-term geochemical evolution of a HLW disposal cell in a granitic host rock is presented. The model includes the vitrified waste (40 cm in diameter), the carbon-steel canister (5 cm thick), the saturated FEBEX bentonite buffer (75 cm thick) and the reference granitic rock. The model accounts for the thermal transient stage and assumes generalized steel corrosion under anaerobic conditions with a corrosion rate equal to 1.41 m/y. Canister failure is assumed to occur when the remaining canister thickness is equal to 3.5 cm at t = 25,000 years. Canister corrosion caused an increase in pH. The computed pH in the canister just before canister failure (t = 25,000 years) was equal to 9.25 and ranged from 7.82 to 9.25 in the bentonite. Magnetite, the main corrosion product, precipitated in the bentonite and especially in the canister. The thickness of magnetite precipitation band in the bentonite was 1 cm. Siderite precipitated at both sides of the canister/bentonite interface. The precipitation front penetrated >1 cm into the bentonite. Nuclear glass started dissolving after canister failure (t > 25,000 years). The concentration of dissolved silica increased in the inner part of the glass until t = 30,000 years and decreased in the outer part of the glass due to the out diffusion of dissolved silica into the canister and the bentonite. This diffusive flux caused the precipitation of greenalite at the glass/canister and canister/bentonite interfaces. The pH at the end of the simulation (t = 50,000 years) ranged from 7.93 to 7.89 in the glass, from 7.89 to 8.66 in the canister and from 7.87 to 8.6 in the bentonite. Magnetite precipitated in the canister while there was carbon steel to corrode. Once the canister was fully corroded, magnetite redissolved near the glass/canister interface. Greenalite precipitated in the canister and the bentonite, especially at the glass/canister interface and siderite precipitated at the canister/bentonite interface. The simulation results should be useful for the performance assessment of engineered barriers of radioactive waste repositories in granitic host rocks. The research leading to these results was funded by ENRESA within the Work Package ACED of EURAD (European Joint Programme on Radioactive Waste Management of the European Union, EC grant agreement nº 847593), the Spanish Ministry of Science and Innovation (PID2019-109544RB-I00) and the Galician Regional Government (Grant ED431C2021/54). Funding for open access charge was provided by Universidade da Coru˜na/CISUG. We thank Diederik Jacques, leader of the ACED Work Package, and the ACED members for many enriching discussions, suggestions and recommendations, Erika Neeft (COVRA) for providing the temperature curves, and the special editor and the two anonymous reviewers for their comments and corrections. Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG Xunta de Galicia; ED431C2021/54
Repositorio da Unive... arrow_drop_down Repositorio da Universidade da CoruñaArticle . 2023License: CC BY NC NDData sources: Repositorio da Universidade da CoruñaRecolector de Ciencia Abierta, RECOLECTAArticle . 2023Full-Text: https://doi.org/10.1016/j.clay.2023.107018Data sources: Recolector de Ciencia Abierta, RECOLECTAadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.clay.2023.107018&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert Repositorio da Unive... arrow_drop_down Repositorio da Universidade da CoruñaArticle . 2023License: CC BY NC NDData sources: Repositorio da Universidade da CoruñaRecolector de Ciencia Abierta, RECOLECTAArticle . 2023Full-Text: https://doi.org/10.1016/j.clay.2023.107018Data sources: Recolector de Ciencia Abierta, RECOLECTAadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.clay.2023.107018&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 France, Spain, FrancePublisher:Elsevier BV Funded by:EC | ATMO-ACCESS, EC | ACTRIS-2, EC | ACTRIS IMP +1 projectsEC| ATMO-ACCESS ,EC| ACTRIS-2 ,EC| ACTRIS IMP ,EC| GRASP-ACESalgueiro, V.; Guerrero-Rascado, J.L.; Costa, M.J.; Román, R.; Cazorla, A.; Serrano, A.; Molero, F.; Sicard, Michaël; Córdoba-Jabonero, C.; Bortoli, D.; Comerón, A.; Couto, F.T.; López-Cayuela, M.Á.; Pérez-Ramírez, D.; Potes, M.; Muñiz-Rosado, J.A.; Obregón, M.A.; Barragán, R.; Oliveira, D.C.F.S.; Abril-Gago, J.; González, R.; Gíl-Díaz, C.; Foyo-Moreno, I.; Muñoz-Porcar, C.; Granados-Muñoz, M.J.; Rodríguez-Gómez, A.; Herreras-Giralda, M.; Bravo-Aranda, J.A.; Carvajal-Pérez, C.V.; Barreto, A.; Alados-Arboledas, L.;handle: 20.500.11765/14845 , 2117/390105
Three volcanic plumes were detected during the Tajogaite volcano eruptive activity (Canary Islands, Spain, September–December 2021) over the Iberian Peninsula. The spatiotemporal evolution of these events is characterised by combining passive satellite remote sensing and ground-based lidar and sun-photometer systems. The inversion algorithm GRASP is used with a suite of ground-based remote sensing instruments such as lidar/ceilometer and sun-photometer from eight sites at different locations throughout the Iberian Peninsula. Satellite observations showed that the volcanic ash plumes remained nearby the Canary Islands covering a mean area of 120 ± 202 km2 during the whole period of eruptive activity and that sulphur dioxide plumes reached the Iberian Peninsula. Remote sensing observations showed that the three events were mainly composed of sulphates, which were transported from the volcano into the free troposphere. The high backscatter-related Ångström exponents for wavelengths 532–1064 nm (1.17 ± 0.20 to 1.40 ± 0.24) and low particle depolarization ratios (0.08 ± 0.02 to 0.09 ± 0.02), measured by the multi-wavelength Raman lidar, hinted at the presence of spherical small particles. The layer aerosol optical depth at 532 nm (AODL532) obtained from lidar measurements contributed between 49% and 82% to the AERONET total column AOD at 532 nm in event II (11–13 October). According to the GRASP retrievals, the layer aerosol optical depth at 440 nm (AODL440) was higher in all sites during event II with values between 0.097 (Badajoz) and 0.233 (Guadiana-UGR) and lower in event III (19–21 October) varying between 0.003 (Granada) and 0.026 (Évora). Compared with the GRASP retrievals of total column AOD at 440 nm, the AODL440 had contributions between 21% and 52% during event II. In the event I (25–28 September), the mean volume concentrations (VC) varied between 5 ± 4 μm3cm−3 (El-Arenosillo/Huelva) and 17 ± 10 μm3cm−3 (Guadiana-UGR), while in event II this variation was from 11 ± 7 μm3cm−3 (Badajoz) to 27 ± 10 μm3cm−3 (Guadiana-UGR). Due to the impact of volcanic events on atmospheric and economic fields, such as radiative forcing and airspace security, a proper characterization is required. This work undertakes it using advanced instrumentation and methods. National funds through FCT -Fundacao para a Ciencia e Tecnologia, I.P., in the framework of the ICT project UIDB/04683/2020 UIDP/04683/2020 PROBE Cost Action - NASA Ra-diation Sciences Program and Earth Observing System UIDB/04683/2020 Andalusia Autonomous Government projects AEROPRE and ADAPNE P18-RT-3820 P20_00136 University of Granada Plan Propio through Singular Laboratory LS2022-1 Spanish Government PID2019-103886RB-I00/AEI/10.13039/501100011033 EUMETNET through the E-PROFILE program and REALISTIC 101086690 Scientific Units of Excellence Program RTI 2018-097332-B-C22 CAMELIA PID2019-104205GB- C21/AEI/10.13039/501100011033 NTEGRATYON3 PID2020-117825GB-C21 PID2020-117825GB- C22 INTA predoctoral contract program A-RNM-430-UGR20 UGR-FEDER projects DEM3TRIOS A-RNM-524-UGR20 R+D+i grant MCIN/AEI/ 10.13039/ 501100011033 ACTRIS-Espa ~na CGL2017- 90884REDT TOMA-QAPA PTDC/CTAMET/29678/2017 EPOLAAR RTI2018-097864-B-I00 ERDF A Way of Doing Europe ELPIS PID2020-120015RB-I00 MOGATRACO UCE-PP2017-02 CLARIN CGL2016-81092-R ATMO-ACCESS 101008004 ACTRIS-IMP 871115 GRASP-ACE 778349 HARMONIA CA21119 ACTRIS-2 654109 PROBE CA18235
Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: Elsevier TDMUPCommons. Portal del coneixement obert de la UPCArticle . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCRepositorio Institucional Universidad de GranadaArticle . 2023Data sources: Repositorio Institucional Universidad de GranadaHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04458861/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rse.2023.113684&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!visibility 161visibility views 161 download downloads 200 Powered bymore_vert Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: Elsevier TDMUPCommons. Portal del coneixement obert de la UPCArticle . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCRepositorio Institucional Universidad de GranadaArticle . 2023Data sources: Repositorio Institucional Universidad de GranadaHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04458861/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rse.2023.113684&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 FrancePublisher:Elsevier BV Funded by:EC | EURADEC| EURADAuthors: El Alam, Jad; Revil, André; Dick, Pierre;El Alam, Jad; Revil, André; Dick, Pierre;International audience; Compacted bentonite is considered as a potential buffer material for deep geological disposals of high-level nuclear wastes. Methodologies to non-intrusively monitor the water content of such sealing materials are important in the context of the safety of these storage facilities and for various engineering applications as well. Induced polarization is a non-intrusive geophysical method sensitive to the water content of porous media. We investigated the complex conductivity spectra of 69 samples made of 2 distinct MX80 bentonites, one in the form of powder from crushed pellets (Type I) and the other in the form of a granulated bentonite mixture (GBM, type II). The samples are prepared at different compaction states and saturations. The pore water conductivity of the porous samples is estimated to be ~2.5 S m− 1 (25 ◦C) by two different methods. The complex conductivity spectra were obtained at room temperature (25 ± 2 ◦C) in the frequency range 1 Hz-45 kHz. In-phase and quadrature conductivities reflect conduction (electromigration) and polarization processes, respectively. At a given frequency, both the in-phase and quadrature conductivities increase with the water content along a trend that is independent of the compaction state. An induced polarization model based on the dynamic Stern layer model is used to explain these results. The first Archie’s exponent m is inferred from the formation factor F using the in-phase conductivity data versus the pore water conductivity data at different salinities (NaCl, 25 ◦C). The dynamic Stern layer model applied to polarization correctly predicts the dependence of the in-phase conductivity, quadrature conductivity, and normalized chargeability with the water content and the Cation Exchange Capacity (CEC). This petrophysical work can easily be applied to time-domain induced polarization data collected in field conditions to monitor hydraulic barriers.
Engineering Geology arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BY NC NDadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.enggeo.2023.107183&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu3 citations 3 popularity Average influence Average impulse Average Powered by BIP!more_vert Engineering Geology arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BY NC NDadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.enggeo.2023.107183&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu
Loading
description Publicationkeyboard_double_arrow_right Article 2024 France EnglishPublisher:HAL CCSD Funded by:EC | GRASP-ACE, EC | ACTRIS IMPEC| GRASP-ACE ,EC| ACTRIS IMPAuthors: Gil-Díaz, Cristina; Sicard, Michäel; Comerón, Adolfo; Fortunato dos Santos Oliveira, Daniel Camilo; +5 AuthorsGil-Díaz, Cristina; Sicard, Michäel; Comerón, Adolfo; Fortunato dos Santos Oliveira, Daniel Camilo; Muñoz-Porcar, Constantino; Rodríguez-Gómez, Alejandro; Lewis, Jasper, R.; Welton, Ellsworth, J.; Lolli, Simone;International audience; In this paper a statistical study of cirrus geometrical and optical properties based on 4 years of continuous ground-based lidar measurements with the Barcelona (Spain) Micro Pulse Lidar (MPL) is analysed. First, a review of the literature on the two-way transmittance method is presented. This method is a well-known lidar inversion method used to retrieve the optical properties of an aerosol–cloud layer between two molecular (i.e. aerosol and cloud-free) regions below and above, without the need to make any a priori assumptions about their optical and/or microphysical properties. Second, a simple mathematical expression of the two-way transmittance method is proposed for both ground-based and spaceborne lidar systems. This approach of the method allows the retrieval of the cloud optical depth, the cloud column lidar ratio and the vertical profile of the cloud backscatter coefficient. The method is illustrated for a cirrus cloud using measurements from the ground-based MPL and from the spaceborne Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). Third, the database is then filtered with a cirrus identification criterion based on (and compared to) the literature using only lidar and radiosonde data. During the period from November 2018 to September 2022, 367 high-altitude cirrus clouds were identified at 00:00 and 12:00 UTC, of which 203 were successfully inverted with the two-way transmittance method. The statistical results of these 203 high-altitude cirrus clouds show that the cloud thickness is 1.8 ± 1.1 km, the mid-cloud temperature is −51 ± 8 ∘C and the linear cloud depolarization ratio is 0.32 ± 0.13. The application of the transmittance method yields an average cloud optical depth (COD) of 0.36 ± 0.45 and a mean effective column lidar ratio of 30 ± 19 sr. Statistical results of the errors associated with the two-way transmittance method retrievals are also provided. The highest occurrence of cirrus is observed in spring and the majority of cirrus clouds (48 %) are visible (0.03 0.3) with a percentage of 38 %. Together with results from other sites, possible latitudinal dependencies have been analysed together with correlations between cirrus cloud properties. For example, we noted that in Barcelona the COD correlates positively with the cloud base temperature, effective column lidar ratio and linear cloud depolarization ratio and negatively with the cloud base height.
HAL Descartes arrow_drop_down HAL DescartesArticle . 2024Full-Text: https://hal.science/hal-04467248/documentData sources: HAL DescartesAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______3379::30f3c47860e6418a1a5be971c8aa69ec&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert HAL Descartes arrow_drop_down HAL DescartesArticle . 2024Full-Text: https://hal.science/hal-04467248/documentData sources: HAL DescartesAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______3379::30f3c47860e6418a1a5be971c8aa69ec&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint 2024 FrancePublisher:Elsevier BV Funded by:EC | CAFEEC| CAFEAuthors: Starck, Thomas; Fardet, Tanguy; Esculier, Fabien;Starck, Thomas; Fardet, Tanguy; Esculier, Fabien;Nitrogen (N) is essential for plant growth and protein synthesis but global reactive N losses, mainly from food systems, induce strong environmental impacts.N losses after human excretion are often overlooked because, in Western societies, they partly occur as inert N2, following denitrification in wastewater treatment plants (WWTP), and losses in waters are often small compared to diffuse agricultural emissions.Yet N from human excretions could be used for crop fertilization, potentially with very high recycling rates via source separation.In this study we use unique operational data from the ~20,000 French WWTPs to produce a N mass-balance of excretions in the French sanitation system.Even though 75% of WWTPs' sludge is spread on crops, only 10% of the excreted N is recycled and 50% of N is lost to the atmosphere, mainly through WWTP nitrification-denitrification.The remaining 40% ends up in water or in diffuse losses in the ground, of which about half is lost outside of the WWTPs' discharge system, through sewers storm water and individual autonomous systems.While WWTPs removal efficiency increased in the 2000s, it has been followed by a decade of stagnation, reaching 70% at the national level.This national average hides regional discrepancies, from 60 to 85% in the 6 French water agencies basins.These differences closely correlate with the classification as ''N sensitive areas'' and is mainly due to large WWTPs which handle most of the N load.Recycling all N in excretions could supply 10% of domestic protein consumption in the current French food system, and up to 30% if it is prioritized towards crop production for human consumption.Redesigning the food system (decrease of nutrient losses, more plant-based diets) could further increase this contribution Comment: arXiv admin note: text overlap with arXiv:2310.06461
HAL Descartes; Mémoi... arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-Ecole des Ponts ParisTechArticle . 2024License: CC BY SAFull-Text: https://hal.science/hal-04232722v2/documentThe Science of The Total EnvironmentArticle . 2024 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefHAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationPreprint . 2023License: CC BY SAFull-Text: https://hal.science/hal-04232722/documenthttps://doi.org/10.48550/arxiv...Article . 2023License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.scitotenv.2023.168978&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert HAL Descartes; Mémoi... arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-Ecole des Ponts ParisTechArticle . 2024License: CC BY SAFull-Text: https://hal.science/hal-04232722v2/documentThe Science of The Total EnvironmentArticle . 2024 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefHAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationPreprint . 2023License: CC BY SAFull-Text: https://hal.science/hal-04232722/documenthttps://doi.org/10.48550/arxiv...Article . 2023License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.scitotenv.2023.168978&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 FrancePublisher:Copernicus GmbH Funded by:EC | REALISTIC, EC | D-TECT, EC | ACTRIS IMPEC| REALISTIC ,EC| D-TECT ,EC| ACTRIS IMPA. Tsekeri; A. Gialitaki; A. Gialitaki; A. Gialitaki; M. Di Paolantonio; M. Di Paolantonio; D. Dionisi; G. L. Liberti; A. Fernandes; A. Szkop; A. Pietruczuk; D. Pérez-Ramírez; D. Pérez-Ramírez; M. J. Granados Muñoz; M. J. Granados Muñoz; J. L. Guerrero-Rascado; J. L. Guerrero-Rascado; L. Alados-Arboledas; L. Alados-Arboledas; D. Bermejo Pantaleón; D. Bermejo Pantaleón; J. A. Bravo-Aranda; J. A. Bravo-Aranda; A. Kampouri; A. Kampouri; E. Marinou; V. Amiridis; M. Sicard; M. Sicard; A. Comerón; C. Muñoz-Porcar; A. Rodríguez-Gómez; S. Romano; M. R. Perrone; X. Shang; M. Komppula; R.-E. Mamouri; R.-E. Mamouri; A. Nisantzi; A. Nisantzi; D. Hadjimitsis; D. Hadjimitsis; F. Navas-Guzmán; F. Navas-Guzmán; A. Haefele; D. Szczepanik; A. Tomczak; I. S. Stachlewska; L. Belegante; D. Nicolae; K. A. Voudouri; K. A. Voudouri; D. Balis; A. A. Floutsi; H. Baars; L. Miladi; N. Pascal; O. Dubovik; A. Lopatin;Abstract. The European Aerosol Research Lidar Network (EARLINET), part of the Aerosols, Clouds and Trace gases Research Infrastructure (ACTRIS), organized an intensive observational campaign in May 2020, with the objective of monitoring the atmospheric state over Europe during the COVID-19 lockdown and relaxation period. Besides the standard operational processing of the lidar data in EARLINET, for seven EARLINET sites having collocated sun-photometric observations in the Aerosol Robotic Network (AERONET), a network exercise was held in order to derive profiles of the concentration and effective column size distributions of the aerosols in the atmosphere, by applying the GRASP/GARRLiC (from Generalized Aerosol Retrieval from Radiometer and Lidar Combined data – GARRLiC – part of the Generalized Retrieval of Atmosphere and Surface Properties – GRASP) inversion algorithm. The objective of this network exercise was to explore the possibility of identifying the anthropogenic component and of monitoring its spatial and temporal characteristics in the COVID-19 lockdown and relaxation period. While the number of cases is far from being statistically significant so as to provide a conclusive description of the atmospheric aerosols over Europe during this period, this network exercise was fundamental to deriving a common methodology for applying GRASP/GARRLiC to a network of instruments with different characteristics. The limits of the approach are discussed, in particular the missing information close to the ground in the lidar measurements due to the instrument geometry and the sensitivity of the GRASP/GARRLiC retrieval to the settings used, especially for cases with low aerosol optical depth (AOD) like the ones we show here. We found that this sensitivity is well-characterized in the GRASP/GARRLiC products, since it is included in their retrieval uncertainties.
Atmospheric Measurem... arrow_drop_down Atmospheric Measurement TechniquesArticle . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Measurement Techniques (AMT)Other literature type . 2023Data sources: Copernicus PublicationsHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04459590/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/amt-16-6025-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert Atmospheric Measurem... arrow_drop_down Atmospheric Measurement TechniquesArticle . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Measurement Techniques (AMT)Other literature type . 2023Data sources: Copernicus PublicationsHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04459590/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/amt-16-6025-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 France, ItalyPublisher:MDPI AG Funded by:EC | ACTRIS-2, EC | ATMO-ACCESS, EC | GRASP-ACE +1 projectsEC| ACTRIS-2 ,EC| ATMO-ACCESS ,EC| GRASP-ACE ,EC| ACTRIS IMPAuthors: Daniel Camilo Fortunato dos Santos Oliveira; Michaël Sicard; Alejandro Rodríguez-Gómez; Adolfo Comerón; +7 AuthorsDaniel Camilo Fortunato dos Santos Oliveira; Michaël Sicard; Alejandro Rodríguez-Gómez; Adolfo Comerón; Constantino Muñoz-Porcar; Cristina Gil-Díaz; Simone Lolli; Oleg Dubovik; Anton Lopatin; Milagros Estefanía Herrera; Marcos Herreras-Giralda;doi: 10.3390/rs15205010
International audience; The versatile Generalized Retrieval of Aerosol and Surface Properties (GRASP) algorithm exploits the advantages of synergic ground-based aerosol observations such as radiometric (sensitive to columnar aerosol optical and microphysical properties) and lidar (sensitive to vertical distribution of the optical properties) observations. The synergy is possible when the complementary data is mutually constrained by GRASP parametrization that includes, for the first time ever, the degree of linear polarization (DoLP) parameter measured by a polarized sun-sky-lunar AERONET photometer (380, 440, 500, 675, 870, 1020, and 1640 nm) in synergy with the vertical profiles from an elastic lidar (355, 532, and 1064 nm). First, a series of numerical tests is performed using simulated data generated using a climatology of data and ground-based measurements. The inversions are performed with and without random noise for five different combinations of input data, starting from the AERONET-like dataset and increasing to the complex one by adding more information for three aerosol scenarios: I—high aerosol optical depth (AOD) with dominant coarse mode; II—low AOD with dominant coarse mode; III—high AOD with dominant fine mode. The inclusion of DoLP improves (i) the retrieval accuracy of the fine-mode properties when it is not dominant; (ii) the retrieval accuracy of the coarse-mode properties at longer wavelengths and that of the fine-mode properties at shorter wavelengths; (iii) the retrieval accuracy of the coarse-mode real part of the refractive index (up to 36% reduction), but has no effect on the retrieval of the imaginary part; (iv) reduces up to 83% the bias of the sphere fraction (SF) retrieval in coarse-mode dominated regimes; and (v) the root mean square error (RMSE) of the retrieval for most of the parameters in all scenarios. In addition, the addition of more photometer channels in synergy with a three-wavelength elastic lidar reduces the RMSE for the real part (67% in the coarse mode) and the imaginary part (35% in the fine mode) of the refractive index, the single scattering albedo (38% in the fine mode), the lidar ratio (20% in the coarse mode), and the SF (43%).
Remote Sensing arrow_drop_down HAL Descartes; HAL - Université de Lille; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BYFull-Text: https://hal.science/hal-04293998/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/rs15205010&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Remote Sensing arrow_drop_down HAL Descartes; HAL - Université de Lille; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BYFull-Text: https://hal.science/hal-04293998/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/rs15205010&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 France, Italy, SpainPublisher:Copernicus GmbH Funded by:EC | ACTRIS-2, EC | ACTRIS, EC | ACTRIS IMP +1 projectsEC| ACTRIS-2 ,EC| ACTRIS ,EC| ACTRIS IMP ,EC| ACTRIS PPPS. Lolli; S. Lolli; M. Sicard; M. Sicard; F. Amato; A. Comeron; C. Gíl-Diaz; T. C. Landi; C. Munoz-Porcar; D. Oliveira; F. Dios Otin; F. Rocadenbosch; F. Rocadenbosch; A. Rodriguez-Gomez; A. Alastuey; X. Querol; C. Reche;handle: 10261/340380 , 2117/396230
Aerosols are one of the most important pollutants in the atmosphere and have been monitored for the past few decades by remote sensing and in situ observation platforms to assess the effectiveness of government-managed reduction emission policies and assess their impact on the radiative budget of the Earth's atmosphere. In fact, aerosols can directly modulate incoming short-wave solar radiation and outgoing long-wave radiation and indirectly influence cloud formation, lifetime, and precipitation. In this study, we quantitatively evaluated long-term temporal trends and seasonal variability from a climatological point of view of the optical and microphysical properties of atmospheric particulate matter at the Universitat Politècnica de Catalunya (UPC), Barcelona, Spain, over the past 17 years, through a synergy of lidar, sun photometer, and in situ concentration measurements. Interannual temporal changes in aerosol optical and microphysical properties are evaluated through the seasonal Mann-Kendall test. Long-term trends in the optical depth of the recovered aerosol; the Ångström exponent (AE); and the concentrations of PM10, PM2.5, and PM1 reveal that emission reduction policies implemented in the past decades were effective in improving air quality, with consistent drops in PM concentrations and optical depth of aerosols. The seasonal analysis of the 17-year average vertically resolved aerosol profiles obtained from lidar observations shows that during summer the aerosol layer can be found up to an altitude of 5 km, after a sharp decay in the first kilometer. In contrast, during the other seasons, the backscatter profiles fit a pronounced exponential decay well with a well-defined scale height. Long-range transport, especially dust outbreaks from the Sahara, is likely to occur throughout the year. During winter, the dust aerosol layers are floating above the boundary layer, while during the other seasons they can penetrate the layer. The analysis also revealed that intense, short-duration pollution events during winter, associated with dust outbreaks, have become more frequent and intense since 2016. This study sheds some light on the meteorological processes and conditions that can lead to the formation of haze and helps decision makers adopt mitigation strategies to preserve large metropolitan areas in the Mediterranean basin. Copyright: This research has been supported by the European Union through NextgenerationEU funds and by the following projects along the years: FP5 EARLINET project (grant no. ID EVR1-CT-1999-40003), FP6 EARLINET-ASOS (ID: 25991), FP7 ACTRIS (ID: 262254), H2020 ACTRIS-2 (ID: 654109), ACTRIS-PPP (ID: 739530), ACTRIS IMP (ID: 871115) and ATMO-ACCESS (ID: 101008004), projects of the Spanish National Research programs (grant nos. TIC 431/93, AMB96-1144-C02-01, REN2000-1907-CE, REN2000-1754-C02-02/CLI, REN2003-09753-C02-C02/CLI, REN2003-09753-C02-C CGL2008-01330-E/CLI 02/CLI, REN2002-12784-E, CGL2005-5131-E, CGL2006-27108-E/CLI, CGL2006-26149-E/CLI, CGL2007-28871-/CLI, CTM2006-27154-E/TECNO, TEC2006-07850/TCM, TEC2009-09106, TEC2012-34575, TEC2015-63832-P and PID2019-103886RB-I00), the project of the Catalan Regional Government IMMPACTE, and the ESA project (grant no. 21487/08/NL/HE). Peer reviewed
CNR ExploRA arrow_drop_down UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCAtmospheric Chemistry and Physics (ACP)Other literature type . 2023Data sources: Copernicus PublicationsAtmospheric Chemistry and Physics (ACP)Article . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefHAL DescartesArticle . 2023Full-Text: https://hal.science/hal-04459517/documentData sources: HAL Descartesadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/acp-23-12887-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert CNR ExploRA arrow_drop_down UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCAtmospheric Chemistry and Physics (ACP)Other literature type . 2023Data sources: Copernicus PublicationsAtmospheric Chemistry and Physics (ACP)Article . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefHAL DescartesArticle . 2023Full-Text: https://hal.science/hal-04459517/documentData sources: HAL Descartesadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/acp-23-12887-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 FrancePublisher:Copernicus GmbH Funded by:EC | CALCYANEC| CALCYANK. Benzerara; A. Elmaleh; M. Ciobanu; A. De Wever; P. Bertolino; M. Iniesto; D. Jézéquel; P. López-García; N. Menguy; E. Muller; F. Skouri-Panet; S. Swaraj; R. Tavera; C. Thomazo; C. Thomazo; D. Moreira;Iron and manganese are poorly soluble elements in oxic and alkaline solutions, whereas they are much more soluble under anoxic conditions. As a result, the formation of authigenic mineral phases rich in Fe and/or Mn has traditionally been viewed as diagnostic of global or local anoxic conditions. Here we reveal that some specific cyanobacteria of very small size (< 2 µm, i.e., picocyanobacteria) can biomineralize abundant, authigenic Fe(III)-, Mn(IV)- and Si-rich amorphous phases under oxic conditions in an alkaline lake in Mexico. The resulting biominerals cluster as small globules arranged as rings around the division septum of cyanobacterial cells. These rings are enveloped within an organic, likely polysaccharidic envelope and are partially preserved, at least morphologically, upon sedimentation. Based on their 16S rDNA sequence, these cyanobacteria were affiliated with the Synechococcales order. The high Fe and Mn enrichment of the biominerals questions the systematic inference of anoxic conditions based on their detection. Moreover, this process scavenges iron from the water column, an overlooked biological contribution to the Fe cycle. Finally, it reveals a new case of controlled biomineralization of Si-rich phases by bacteria.
Biogeosciences arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2023License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/bg-20-4183-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Biogeosciences arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2023License: CC BYadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/bg-20-4183-2023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Preprint , Article 2023 FrancePublisher:Copernicus GmbH Funded by:EC | ACTRIS IMP, AKA | Atmosphere and Climate Co..., EC | GRASP-ACE +1 projectsEC| ACTRIS IMP ,AKA| Atmosphere and Climate Competence Center (ACCC) / Consortium: ACCC ,EC| GRASP-ACE ,AKA| Are Biogenic Secondary Organic Aerosols Climatically Significant in the Boreal Region?X. Shang; A. Lipponen; M. Filioglou; A.-M. Sundström; M. Parrington; V. Buchard; V. Buchard; A. S. Darmenov; E. J. Welton; E. Marinou; V. Amiridis; M. Sicard; M. Sicard; A. Rodríguez-Gómez; M. Komppula; T. Mielonen;Abstract. In May–June 2019, smoke plumes from wildfires in Alberta, Canada, were advected all the way to Europe. To analyze the evolution of the plumes and to estimate the amount of smoke aerosols transported to Europe, retrievals from the space-borne lidar CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) were used. The plumes were located with the help of a trajectory analysis, and the mass of smoke aerosols were retrieved from the CALIOP observations. The accuracy of the CALIOP mass retrievals was compared with the accuracy of ground-based lidars/ceilometer near the source in North America and after the long-range transport in Europe. Overall, CALIOP and the ground-based lidars/ceilometer produced comparable results. Over North America the CALIOP layer mean mass was 30 % smaller than the ground-based estimates, whereas over Southern Europe that difference varied between 12 % and 43 %. Finally, the CALIOP mass retrievals were compared with simulated aerosol concentrations from two reanalysis models, MERRA-2 (Modern-Era Retrospective analysis for Research and Applications, Version 2) and CAMS (Copernicus Atmospheric Monitoring System). The simulated total column aerosol optical depths (AOD) and the total column mass concentration of smoke agreed quite well with CALIOP observations, but the comparison of the layer mass concentration of smoke showed significant discrepancies. The amount of smoke aerosols in the model simulations was consistently smaller than in the CALIOP retrievals. These results highlight the limitations of such models, and more specifically their limitation to reproduce properly the smoke vertical distribution. They indicate that CALIOP is a useful tool monitoring smoke plumes over secluded areas whereas reanalysis models have difficulties in representing the aerosol mass in these plumes. This study shows the advantages of space-borne aerosol lidars, e.g. being of paramount importance to monitor smoke plumes, and reveals the urgent need of future lidar missions in space.
Copernicus Publicati... arrow_drop_down https://doi.org/10.5194/egusph...Preprint . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Article . 2024 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Other literature type . 2024Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/egusphere-2023-1945&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Copernicus Publicati... arrow_drop_down https://doi.org/10.5194/egusph...Preprint . 2023 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Article . 2024 . Peer-reviewedLicense: CC BYData sources: CrossrefAtmospheric Chemistry and Physics (ACP)Other literature type . 2024Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/egusphere-2023-1945&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 France, SpainPublisher:Elsevier BV Funded by:EC | EURADEC| EURADMontenegro, Luis; Samper, Javier; Mon, Alba; de Windt, Laurent; Samper, Aurora-Core; García, Enrique;handle: 2183/33897
[Abstract:] The assessment of the long-term performance of the engineered barrier systems of high-level radioactive waste (HLW) repositories requires the use of reactive transport models. Here a non-isothermal reactive transport model of the long-term geochemical evolution of a HLW disposal cell in a granitic host rock is presented. The model includes the vitrified waste (40 cm in diameter), the carbon-steel canister (5 cm thick), the saturated FEBEX bentonite buffer (75 cm thick) and the reference granitic rock. The model accounts for the thermal transient stage and assumes generalized steel corrosion under anaerobic conditions with a corrosion rate equal to 1.41 m/y. Canister failure is assumed to occur when the remaining canister thickness is equal to 3.5 cm at t = 25,000 years. Canister corrosion caused an increase in pH. The computed pH in the canister just before canister failure (t = 25,000 years) was equal to 9.25 and ranged from 7.82 to 9.25 in the bentonite. Magnetite, the main corrosion product, precipitated in the bentonite and especially in the canister. The thickness of magnetite precipitation band in the bentonite was 1 cm. Siderite precipitated at both sides of the canister/bentonite interface. The precipitation front penetrated >1 cm into the bentonite. Nuclear glass started dissolving after canister failure (t > 25,000 years). The concentration of dissolved silica increased in the inner part of the glass until t = 30,000 years and decreased in the outer part of the glass due to the out diffusion of dissolved silica into the canister and the bentonite. This diffusive flux caused the precipitation of greenalite at the glass/canister and canister/bentonite interfaces. The pH at the end of the simulation (t = 50,000 years) ranged from 7.93 to 7.89 in the glass, from 7.89 to 8.66 in the canister and from 7.87 to 8.6 in the bentonite. Magnetite precipitated in the canister while there was carbon steel to corrode. Once the canister was fully corroded, magnetite redissolved near the glass/canister interface. Greenalite precipitated in the canister and the bentonite, especially at the glass/canister interface and siderite precipitated at the canister/bentonite interface. The simulation results should be useful for the performance assessment of engineered barriers of radioactive waste repositories in granitic host rocks. The research leading to these results was funded by ENRESA within the Work Package ACED of EURAD (European Joint Programme on Radioactive Waste Management of the European Union, EC grant agreement nº 847593), the Spanish Ministry of Science and Innovation (PID2019-109544RB-I00) and the Galician Regional Government (Grant ED431C2021/54). Funding for open access charge was provided by Universidade da Coru˜na/CISUG. We thank Diederik Jacques, leader of the ACED Work Package, and the ACED members for many enriching discussions, suggestions and recommendations, Erika Neeft (COVRA) for providing the temperature curves, and the special editor and the two anonymous reviewers for their comments and corrections. Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG Xunta de Galicia; ED431C2021/54
Repositorio da Unive... arrow_drop_down Repositorio da Universidade da CoruñaArticle . 2023License: CC BY NC NDData sources: Repositorio da Universidade da CoruñaRecolector de Ciencia Abierta, RECOLECTAArticle . 2023Full-Text: https://doi.org/10.1016/j.clay.2023.107018Data sources: Recolector de Ciencia Abierta, RECOLECTAadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.clay.2023.107018&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert Repositorio da Unive... arrow_drop_down Repositorio da Universidade da CoruñaArticle . 2023License: CC BY NC NDData sources: Repositorio da Universidade da CoruñaRecolector de Ciencia Abierta, RECOLECTAArticle . 2023Full-Text: https://doi.org/10.1016/j.clay.2023.107018Data sources: Recolector de Ciencia Abierta, RECOLECTAadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.clay.2023.107018&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 France, Spain, FrancePublisher:Elsevier BV Funded by:EC | ATMO-ACCESS, EC | ACTRIS-2, EC | ACTRIS IMP +1 projectsEC| ATMO-ACCESS ,EC| ACTRIS-2 ,EC| ACTRIS IMP ,EC| GRASP-ACESalgueiro, V.; Guerrero-Rascado, J.L.; Costa, M.J.; Román, R.; Cazorla, A.; Serrano, A.; Molero, F.; Sicard, Michaël; Córdoba-Jabonero, C.; Bortoli, D.; Comerón, A.; Couto, F.T.; López-Cayuela, M.Á.; Pérez-Ramírez, D.; Potes, M.; Muñiz-Rosado, J.A.; Obregón, M.A.; Barragán, R.; Oliveira, D.C.F.S.; Abril-Gago, J.; González, R.; Gíl-Díaz, C.; Foyo-Moreno, I.; Muñoz-Porcar, C.; Granados-Muñoz, M.J.; Rodríguez-Gómez, A.; Herreras-Giralda, M.; Bravo-Aranda, J.A.; Carvajal-Pérez, C.V.; Barreto, A.; Alados-Arboledas, L.;handle: 20.500.11765/14845 , 2117/390105
Three volcanic plumes were detected during the Tajogaite volcano eruptive activity (Canary Islands, Spain, September–December 2021) over the Iberian Peninsula. The spatiotemporal evolution of these events is characterised by combining passive satellite remote sensing and ground-based lidar and sun-photometer systems. The inversion algorithm GRASP is used with a suite of ground-based remote sensing instruments such as lidar/ceilometer and sun-photometer from eight sites at different locations throughout the Iberian Peninsula. Satellite observations showed that the volcanic ash plumes remained nearby the Canary Islands covering a mean area of 120 ± 202 km2 during the whole period of eruptive activity and that sulphur dioxide plumes reached the Iberian Peninsula. Remote sensing observations showed that the three events were mainly composed of sulphates, which were transported from the volcano into the free troposphere. The high backscatter-related Ångström exponents for wavelengths 532–1064 nm (1.17 ± 0.20 to 1.40 ± 0.24) and low particle depolarization ratios (0.08 ± 0.02 to 0.09 ± 0.02), measured by the multi-wavelength Raman lidar, hinted at the presence of spherical small particles. The layer aerosol optical depth at 532 nm (AODL532) obtained from lidar measurements contributed between 49% and 82% to the AERONET total column AOD at 532 nm in event II (11–13 October). According to the GRASP retrievals, the layer aerosol optical depth at 440 nm (AODL440) was higher in all sites during event II with values between 0.097 (Badajoz) and 0.233 (Guadiana-UGR) and lower in event III (19–21 October) varying between 0.003 (Granada) and 0.026 (Évora). Compared with the GRASP retrievals of total column AOD at 440 nm, the AODL440 had contributions between 21% and 52% during event II. In the event I (25–28 September), the mean volume concentrations (VC) varied between 5 ± 4 μm3cm−3 (El-Arenosillo/Huelva) and 17 ± 10 μm3cm−3 (Guadiana-UGR), while in event II this variation was from 11 ± 7 μm3cm−3 (Badajoz) to 27 ± 10 μm3cm−3 (Guadiana-UGR). Due to the impact of volcanic events on atmospheric and economic fields, such as radiative forcing and airspace security, a proper characterization is required. This work undertakes it using advanced instrumentation and methods. National funds through FCT -Fundacao para a Ciencia e Tecnologia, I.P., in the framework of the ICT project UIDB/04683/2020 UIDP/04683/2020 PROBE Cost Action - NASA Ra-diation Sciences Program and Earth Observing System UIDB/04683/2020 Andalusia Autonomous Government projects AEROPRE and ADAPNE P18-RT-3820 P20_00136 University of Granada Plan Propio through Singular Laboratory LS2022-1 Spanish Government PID2019-103886RB-I00/AEI/10.13039/501100011033 EUMETNET through the E-PROFILE program and REALISTIC 101086690 Scientific Units of Excellence Program RTI 2018-097332-B-C22 CAMELIA PID2019-104205GB- C21/AEI/10.13039/501100011033 NTEGRATYON3 PID2020-117825GB-C21 PID2020-117825GB- C22 INTA predoctoral contract program A-RNM-430-UGR20 UGR-FEDER projects DEM3TRIOS A-RNM-524-UGR20 R+D+i grant MCIN/AEI/ 10.13039/ 501100011033 ACTRIS-Espa ~na CGL2017- 90884REDT TOMA-QAPA PTDC/CTAMET/29678/2017 EPOLAAR RTI2018-097864-B-I00 ERDF A Way of Doing Europe ELPIS PID2020-120015RB-I00 MOGATRACO UCE-PP2017-02 CLARIN CGL2016-81092-R ATMO-ACCESS 101008004 ACTRIS-IMP 871115 GRASP-ACE 778349 HARMONIA CA21119 ACTRIS-2 654109 PROBE CA18235
Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: Elsevier TDMUPCommons. Portal del coneixement obert de la UPCArticle . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCRepositorio Institucional Universidad de GranadaArticle . 2023Data sources: Repositorio Institucional Universidad de GranadaHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04458861/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rse.2023.113684&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!visibility 161visibility views 161 download downloads 200 Powered bymore_vert Remote Sensing of En... arrow_drop_down Remote Sensing of Environment; UPCommons. Portal del coneixement obert de la UPCOther literature type . Article . 2023 . Peer-reviewedLicense: Elsevier TDMUPCommons. Portal del coneixement obert de la UPCArticle . 2023 . Peer-reviewedLicense: CC BYData sources: UPCommons. Portal del coneixement obert de la UPCRepositorio Institucional Universidad de GranadaArticle . 2023Data sources: Repositorio Institucional Universidad de GranadaHAL Descartes; HAL - Université de LilleArticle . 2023Full-Text: https://hal.science/hal-04458861/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rse.2023.113684&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 FrancePublisher:Elsevier BV Funded by:EC | EURADEC| EURADAuthors: El Alam, Jad; Revil, André; Dick, Pierre;El Alam, Jad; Revil, André; Dick, Pierre;International audience; Compacted bentonite is considered as a potential buffer material for deep geological disposals of high-level nuclear wastes. Methodologies to non-intrusively monitor the water content of such sealing materials are important in the context of the safety of these storage facilities and for various engineering applications as well. Induced polarization is a non-intrusive geophysical method sensitive to the water content of porous media. We investigated the complex conductivity spectra of 69 samples made of 2 distinct MX80 bentonites, one in the form of powder from crushed pellets (Type I) and the other in the form of a granulated bentonite mixture (GBM, type II). The samples are prepared at different compaction states and saturations. The pore water conductivity of the porous samples is estimated to be ~2.5 S m− 1 (25 ◦C) by two different methods. The complex conductivity spectra were obtained at room temperature (25 ± 2 ◦C) in the frequency range 1 Hz-45 kHz. In-phase and quadrature conductivities reflect conduction (electromigration) and polarization processes, respectively. At a given frequency, both the in-phase and quadrature conductivities increase with the water content along a trend that is independent of the compaction state. An induced polarization model based on the dynamic Stern layer model is used to explain these results. The first Archie’s exponent m is inferred from the formation factor F using the in-phase conductivity data versus the pore water conductivity data at different salinities (NaCl, 25 ◦C). The dynamic Stern layer model applied to polarization correctly predicts the dependence of the in-phase conductivity, quadrature conductivity, and normalized chargeability with the water content and the Cation Exchange Capacity (CEC). This petrophysical work can easily be applied to time-domain induced polarization data collected in field conditions to monitor hydraulic barriers.
Engineering Geology arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BY NC NDadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.enggeo.2023.107183&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu3 citations 3 popularity Average influence Average impulse Average Powered by BIP!more_vert Engineering Geology arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la CommunicationArticle . 2023License: CC BY NC NDadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.enggeo.2023.107183&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu