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description Publicationkeyboard_double_arrow_right Other literature type , Article 2016 United States, Switzerland, France, Finland, France, FinlandPublisher:American Association for the Advancement of Science (AAAS) Funded by:EC | nanoCAVa, AKA | Formation and growth of a..., AKA | ATMOSPHERIC SCIENCES - Pa... +16 projectsEC| nanoCAVa ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,AKA| ATMOSPHERIC SCIENCES - Particularly for determination of cluster and nanoaerosol composition ,AKA| Measurement of Nano-particle Nucelation in the Atmosphere via Cluster Ion Mass Spectrometry ,FCT| Collaboration in the CLOUD experiment ,SNSF| Investigation of new particle formation in the CLOUD chamber at CERN and the PSI smog chamber ,AKA| Nanoaerosol synthesis for bridging laboratory and field investigations of new particle formation and growth ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,FWF| Chemical Characterization of Organic Nanoparticles ,UKRI| E-Infrastructure Interconnectivity EPSRC - Chris Taylor ,AKA| Infrastructure of Environmental and Atmospheric Sciences (ATM-Science) ,SNSF| CLOUD ,SNSF| FORCE Proposal to Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,EC| ATMNUCLE ,AKA| Computational research chain from quantum chemistry to climate change / Consortium: ComQuaCC ,AKA| Nucleation of particles and ice in the atmosphere: from surface layer to upper troposphere ,SNSF| Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,UKRI| Global Aerosol Synthesis and Science Project (GASSP) to reduce the uncertainty in aerosol radiative forcing ,SNSF| Molecular Imaging of CNS-Immune System Interactions in Multiple SclerosisEimear M. Dunne; Hamish Gordon; Andreas Kürten; Joao Almeida; Jonathan Duplissy; Christina Williamson; Ismael K. Ortega; Kirsty J. Pringle; Alexey Adamov; Urs Baltensperger; Peter Barmet; Francois Benduhn; F. Bianchi; Martin Breitenlechner; Antony D. Clarke; Joachim Curtius; Josef Dommen; Neil M. Donahue; Sebastian Ehrhart; Richard C. Flagan; Alessandro Franchin; Roberto Guida; Jani Hakala; Armin Hansel; Martin Heinritzi; Tuija Jokinen; Juha Kangasluoma; Jasper Kirkby; Markku Kulmala; Agnieszka Kupc; Michael J. Lawler; Katrianne Lehtipalo; Vladimir Makhmutov; Graham Mann; Serge Mathot; Joonas Merikanto; Pasi Miettinen; Athanasios Nenes; Antti Onnela; Alexandru Rap; Carly Reddington; Francesco Riccobono; N. A. D. Richards; Matti P. Rissanen; Linda Rondo; Nina Sarnela; Siegfried Schobesberger; Kamalika Sengupta; Mario Simon; Mikko Sipilä; James N. Smith; Yuri Stozkhov; António Tomé; Jasmin Tröstl; Paul E. Wagner; Daniela Wimmer; Paul M. Winkler; Douglas R. Worsnop; Kenneth S. Carslaw;pmid: 27789796
New particle formation in the atmosphere produces around half of the cloud condensation nuclei that seed cloud droplets. Such particles have a pivotal role in determining the properties of clouds and the global radiation balance. Dunne et al. used the CLOUD (Cosmics Leaving Outdoor Droplets) chamber at CERN to construct a model of aerosol formation based on laboratory measured nucleation rates. They found that nearly all nucleation involves either ammonia or biogenic organic compounds. Furthermore in the present day atmosphere cosmic ray intensity cannot meaningfully affect climate via nucleation.Science this issue p. 1119Fundamental questions remain about the origin of newly formed atmospheric aerosol particles because data from laboratory measurements have been insufficient to build global models. In contrast gas phase chemistry models have been based on laboratory kinetics measurements for decades. We built a global model of aerosol formation by using extensive laboratory measurements of rates of nucleation involving sulfuric acid ammonia ions and organic compounds conducted in the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber. The simulations and a comparison with atmospheric observations show that nearly all nucleation throughout the present day atmosphere involves ammonia or biogenic organic compounds in addition to sulfuric acid. A considerable fraction of nucleation involves ions but the relatively weak dependence on ion concentrations indicates that for the processes studied variations in cosmic ray intensity do not appreciably affect climate through nucleation in the present day atmosphere.U http://science.sciencemag.org/content/sci/354/6316/1119.full.pdf
Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 276 citations 276 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 34visibility views 34 download downloads 740 Powered bymore_vert Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific 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.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2021 Netherlands, Belgium, FrancePublisher:Elsevier BV Leon T. Hauser; Jean-Baptiste Féret; Nguyen An Binh; Niels van der Windt; Ângelo Filipe dos Reis Pereira e Cortinhas Sil; J. Timmermans; Nadejda A. Soudzilovskaia; Peter M. van Bodegom;Large-scale high-resolution satellite observations of plant functional diversity patterns will greatly benefit our ability to study ecosystem functioning. Here, we demonstrate a potentially scalable approach that uses aggregate plant traits estimated from radiative transfer model (RTM) inversion of Sentinel-2 satellite images to calculate community patterns of plant functional diversity. Trait retrieval relied on simulations and Look-up Tables (LUTs) generated by a RTM rather than heavily depending on a priori field data and data-driven statistical learning. This independence from in-situ training data benefits its scalability as relevant field data remains scarce and difficult to acquire. We ran a total of three different inversion algorithms that are representative of commonly applied approaches and we used two different metrics to calculate functional diversity. In tandem with Sentinel-2 image-based estimation of plant traits, we measured Leaf Area Index (LAI), leaf Chlorophyll content (CAB), and Leaf Mass per Area (LMA) in-situ in a (semi-)natural heterogeneous landscape (Montesinho region) located in northern Portugal. Sampling plots were scaled and georeferenced to match the satellite observed pixels and thereby allowed for a direct one-to-one posterior ground truth validation of individual traits and functional diversity. Across approaches, we observe a reasonable correspondence between the satellite-based retrievals and the insitu observations in terms of the relative distribution of individual trait means and plant functional diversity across locations despite the heterogeneity of the landscape and canopies. The functional diversity estimates, based on a combination of canopy and leaf traits, were robust against estimation biases in trait means. Particularly, the convex hull volume estimate of functional diversity showed strong concordance with in-situ observations across all three inversion methods (Spearman's rho: 0.67-0.80). The remotely sensed estimates of functional diversity also related to in-situ taxonomic diversity (Spearman's rho: 0.55-0.63). Our work highlights the potential and challenges of RTM-based functional diversity metrics to study spatial community-level ecological patterns using currently operational and publicly available Sentinel-2 imagery. While further validation and assessment across different ecosystems and larger datasets are needed, the study contributes towards a further maturation of scalable, spatially, and temporally explicit methods for functional diversity assessments from space. The authors would like to acknowledge Christian Rossi, Prof. Geof-frey M. Henebry, and the anonymous reviewers for their valuable comments and suggestions that greatly improved the manuscript. This work was supported financially by the Ecology Fund of the RoyalNetherlands Academy of Arts and Sciences (‘KNAW Fonds Ecologie’; KNAWWF/807/19011). We thank Altino Geraldes, Joao Carlos Aze-vedo, and the local farmers and foresters in the Montesinho-Nogueira Natura 2000 site for their help and collaboration. We thank Emilie Didaskalou for her lab assistance. J.-B. F ́eret acknowledges financial support from Agence Nationale de la Recherche (BioCop project—ANR- 17-32CE-0001).
NARCIS arrow_drop_down Leiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications RepositoryMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . 2021License: CC BYFull-Text: https://hal.inrae.fr/hal-03245246/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.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 23 citations 23 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert NARCIS arrow_drop_down Leiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications RepositoryMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . 2021License: CC BYFull-Text: https://hal.inrae.fr/hal-03245246/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.2021.112505&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2018 France, France, United KingdomPublisher:Springer Science and Business Media LLC Stephen R. Rintoul; Steven L. Chown; Robert M. DeConto; Matthew H. England; Helen A. Fricker; Valérie Masson-Delmotte; Tim R Naish; Martin J. Siegert; José C. Xavier;pmid: 30018346
We present two narratives on the future of Antarctica and the Southern Ocean, from the perspective of an observer looking back from 2070. In the first scenario, greenhouse gas emissions remained unchecked, the climate continued to warm, and the policy response was ineffective; this had large ramifications in Antarctica and the Southern Ocean, with worldwide impacts. In the second scenario, ambitious action was taken to limit greenhouse gas emissions and to establish policies that reduced anthropogenic pressure on the environment, slowing the rate of change in Antarctica. Choices made in the next decade will determine what trajectory is realized.
add 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=10.1038/s41586-018-0173-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 162 citations 162 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 115visibility views 115 download downloads 238 Powered bymore_vert add 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=10.1038/s41586-018-0173-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2016 Italy, France, France, France, France, Italy, Germany, France, MaltaPublisher:American Geophysical Union (AGU) Funded by:EC | SCARP, EC | ASTARTEEC| SCARP ,EC| ASTARTEAuthors: Marc-André Gutscher; Stéphane Dominguez; Bernard Mercier de Lépinay; Luis M. Pinheiro; +7 AuthorsMarc-André Gutscher; Stéphane Dominguez; Bernard Mercier de Lépinay; Luis M. Pinheiro; Flora Gallais; Nathalie Babonneau; Antonio Cattaneo; Yann Le Faou; Giovanni Barreca; Aaron Micallef; Marzia Rovere;doi: 10.1002/2015tc003898
handle: 20.500.11769/497146
Subduction of a narrow slab of oceanic lithosphere beneath a tightly curved orogenic arc requires the presence of at least one lithospheric scale tear fault. While the Calabrian subduction beneath southern Italy is considered to be the type example of this geodynamic setting, the geometry, kinematics and surface expression of the associated lateral, slab tear fault offshore eastern Sicily remain controversial. Results from a new marine geophysical survey conducted in the Ionian Sea, using high-resolution bathymetry and seismic profiling reveal active faulting at the seafloor within a 140 km long, two-branched fault system near Alfeo Seamount. The previously unidentified 60 km long NW trending North Alfeo Fault system shows primarily strike-slip kinematics as indicated by the morphology and steep-dipping transpressional and transtensional faults. Available earthquake focal mechanisms indicate dextral strike-slip motion along this fault segment. The 80 km long SSE trending South Alfeo fault system is expressed by one or two steeply dipping normal faults, bounding the western side of a 500+ m thick, 5 km wide, elongate, syntectonic Plio-Quaternary sedimentary basin. Both branches of the fault system are mechanically capable of generating magnitude 6–7 earthquakes like those that struck eastern Sicily in 1169, 1542, and 1693. peer-reviewed
IRIS - Università de... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2016Data sources: ArchiMer - Institutional Archive of IfremerIRIS - Università degli Studi di CataniaArticle . 2016Data sources: IRIS - Università degli Studi di Cataniahttps://doi.org/10.1002/2015TC...Other literature typeData sources: European Union Open Data Portaladd 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=10.1002/2015tc003898&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 75 citations 75 popularity Top 10% influence Top 10% impulse Top 1% Powered by BIP!visibility 13visibility views 13 download downloads 3 Powered bymore_vert IRIS - Università de... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2016Data sources: ArchiMer - Institutional Archive of IfremerIRIS - Università degli Studi di CataniaArticle . 2016Data sources: IRIS - Università degli Studi di Cataniahttps://doi.org/10.1002/2015TC...Other literature typeData sources: European Union Open Data Portaladd 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=10.1002/2015tc003898&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Preprint 2012 FrancePublisher:Copernicus GmbH Authors: Bashmachnikov, I.; Carton, X.;Bashmachnikov, I.; Carton, X.;Abstract. Meddies, intra-thermocline eddies of Mediterranean water, can often be detected at the sea surface as positive sea-level anomalies. Here we study the surface signature of several meddies tracked with RAFOS floats and AVISO altimetry. While pushing its way through the water column, a meddy raises isopycnals above. As a consequence of potential vorticity conservation, negative relative vorticity is generated in the upper layer. During the initial period of meddy acceleration after meddy formation or after a stagnation stage, a cyclonic signal is also generated at the sea-surface, but mostly the anticyclonic surface signal follows the meddy. Based on geostrophy and potential vorticity balance, we present theoretical estimates of the intensity of the surface signature. It appears to be proportional to the meddy core radius and to the Coriolis parameter, and inversely proportional to the core depth and buoyancy frequency. This indicates that surface signature of a meddy may be strongly reduced by the upper ocean stratification. Using climatic distribution of the stratification intensity, we claim that the southernmost limit for detection in altimetry of small meddies (with radii on the order of 10–15 km) should lie in the subtropics (35–45° N), while large meddies (with radii of 25–30 km) could be detected as far south as the northern tropics (25–35° N). Those results agree with observations.
Ocean Science arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2012Data sources: ArchiMer - Institutional Archive of Ifremeradd 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/osd-9-2457-2012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 28 citations 28 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 11visibility views 11 download downloads 4 Powered bymore_vert Ocean Science arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2012Data sources: ArchiMer - Institutional Archive of Ifremeradd 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/osd-9-2457-2012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 1999 FrancePublisher:EDP Sciences Funded by:FCT | D4FCT| D4Authors: Wong, T. F.; Baud, P.;Wong, T. F.; Baud, P.;doi: 10.2516/ogst:1999061
International audience; In many reservoir engineering and tectonic problems, the ability to predict both the occurrence and extent of inelastic deformation and failure hinges upon a fundamental understanding of the phenomenology and micromechanics of compaction in reservoir rock. This paper reviews recent research advances on mechanical compaction of porous sandstone, with focus on the synthesis of laboratory data, quantitative microstructural characterization of damage, and theoretical models based on elastic contact and fracture mechanics. The mechanical attributes of compaction in nominally dry and saturated samples have been studied under hydrostatic and nonhydrostatic loadings over a broad range of pressure conditions. Specific topics reviewed herein include: comparison of mechanical and acoustic emission data with continuum plasticity theory; microstructural control of onset and development of compaction; strain hardening and spatial evolution of damage during compaction; and the weakening effect of water on compactive yield and porosity change.
Oil & Gas Scienc... arrow_drop_down Mémoires en Sciences de l'Information et de la CommunicationArticle . 1999License: CC BYFull-Text: https://hal.science/hal-02075856/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=10.2516/ogst:1999061&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 91 citations 91 popularity Top 10% influence Top 10% impulse Average Powered by BIP!more_vert Oil & Gas Scienc... arrow_drop_down Mémoires en Sciences de l'Information et de la CommunicationArticle . 1999License: CC BYFull-Text: https://hal.science/hal-02075856/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=10.2516/ogst:1999061&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2014 FrancePublisher:Elsevier BV Funded by:FCT | D4FCT| D4Moreau , Jean-David; Fara , Emmanuel; Gand , Georges; Lafaurie , Gérard; Baret , Louis;International audience; An abundant ichnological material composed of xiphosuran trackways and isolated traces was discovered in Upper Jurassic limestones from the Causses Basin (Causse Méjean, Lozère, France). The morphology of the imprints supports their identification as Kouphichnium isp. In contrast to the most frequent case, the trackways are composed of omnipresent pusher imprints sometime associated with leg traces, but with no telson mark. We argue that this pattern reflects actual surface traces rather than an incomplete set of undertracks. The size distribution of the sampled ichnites is broadly bimodal. This is best explained by sexual dimorphism, a phenomenon frequently observed in modern xiphosurans. Analysis of the trace fossils further suggests that several growth stages are recorded and that the horseshoe crabs were walking in a protected and flat environment like a lagoon. This area, certainly close to a mating ground, was occasionally affected by a continental influence. The biometric study of the tracks suggests a gigantic size for the trackmakers whose body may have reached 84 cm in length. This discovery complements the few reports on other gigantic horseshoe crabs in the Jurassic of Western Europe, thus casting doubt on the postulated increase in body size from the Palaeozoic to the Recent. Furthermore, a literature review shows that there are still major gaps in the record of limulid body-fossils and tracks. Thus, neither of these archives can be taken at face value for quantifying the body-size evolution of horseshoe crabs.
add 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.geobios.2014.06.005&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 13 citations 13 popularity Average influence Average impulse Average Powered by BIP!more_vert add 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.geobios.2014.06.005&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2014 France EnglishPublisher:HAL CCSD Funded by:FCT | D4FCT| D4Deshmukh, C.; Serça, Dominique; Delon, Claire; Tardif, R.; Demarty, M.; Jarnot, C.; Meyerfeld, Y.; Chanudet, V.; Guédant, P.; Rode, W.; Descloux, S.; Guérin, F.;In the present study, we measured independently CH4 ebullition and diffusion in the footprint of an eddy covariance system (EC) measuring CH4 emissions in the Nam Theun 2 Reservoir, a recently impounded (2008) subtropical hydroelectric reservoir located in the Lao People's Democratic Republic (PDR), Southeast Asia. The EC fluxes were very consistent with the sum of the two terms measured independently (diffusive fluxes + ebullition = EC fluxes), indicating that the EC system picked up both diffusive fluxes and ebullition from the reservoir. We showed a diurnal bimodal pattern of CH4 emissions anti-correlated with atmospheric pressure. During daytime, a large atmospheric pressure drop triggers CH4 ebullition (up to 100 mmol m−2 d−1), whereas at night, a more moderate peak of CH4 emissions was recorded. As a consequence, fluxes during daytime were twice as high as during nighttime. Additionally, more than 4800 discrete measurements of CH4 ebullition were performed at a weekly/fortnightly frequency, covering water depths ranging from 0.4 to 16 m and various types of flooded ecosystems. Methane ebullition varies significantly seasonally and depends mostly on water level change during the warm dry season, whereas no relationship was observed during the cold dry season. On average, ebullition was 8.5 ± 10.5 mmol m−2 d−1 and ranged from 0 to 201.7 mmol m−2 d−1. An artificial neural network (ANN) model could explain up to 46% of seasonal variability of ebullition by considering total static pressure (the sum of hydrostatic and atmospheric pressure), variations in the total static pressure, and bottom temperature as controlling factors. This model allowed extrapolation of CH4 ebullition on the reservoir scale and performance of gap filling over four years. Our results clearly showed a very high seasonality: 50% of the yearly CH4 ebullition occurs within four months of the warm dry season. Overall, ebullition contributed 60–80% of total emissions from the surface of the reservoir (disregarding downstream emissions), suggesting that ebullition is a major pathway in young hydroelectric reservoirs in the tropics.
Horizon / Pleins tex... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2014License: CC BYFull-Text: https://hal.science/hal-03026379/documentAll 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______2592::190a05d92d8c60bcb5f9c557bede6b54&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 Horizon / Pleins tex... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2014License: CC BYFull-Text: https://hal.science/hal-03026379/documentAll 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______2592::190a05d92d8c60bcb5f9c557bede6b54&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2005 France, United KingdomPublisher:Copernicus GmbH Funded by:FCT | LA 1FCT| LA 1Authors: R. A. Makarevitch; R. A. Makarevitch; F. Honary;R. A. Makarevitch; R. A. Makarevitch; F. Honary;We present examples and statistical analysis of the events with statistically significant correlation between the cosmic noise absorption (CNA) and the signal-to-noise ratio (SNR) of the VHF coherent echo intensity in the area monitored simultaneously by an imaging riometer and two oblique-sounding coherent VHF radars in Northern Scandinavia. By only considering the observations from the narrow riometer beams comparable (in terms of the intersection with the ionosphere) with the VHF radar cells, we identify ~200 one-hour high correlation periods (HCPs) for 2 years near the solar cycle maximum, 2000–2001. The HCP occurrence is maximized in the afternoon (12:00–17:00 UT, MLT≅UT+3), with the secondary peak near the midnight (21:00–02:00 UT). Relative to the VHF echo occurrence, HCPs occur more frequently from 11:00 to 20:00 UT. The diurnal variation of HCP occurrence is similar to that of the 1-h intervals with the lowest mean absorption <i>A</i><0.25dB. </p><p style="line-height: 20px;"> The HCPs are observed more frequently during the winter months, which, combined with the fact that VHF echoes observed during HCPs exhibit features typical for field-aligned E-region irregularities, makes their association with the polar mesospheric echoes (for which some positive CNA/SNR correlation has been reported in the past) very unlikely. Instead, we attribute the high positive CNA/SNR correlation to the synchronous, to a first approximation, variation of the particle fluxes for two different but close sets of energies. </p><p style="line-height: 20px;"> By considering the dependence of the CNA/SNR correlation coefficients for both VHF radars (<i>C<sub>A1</sub></i> and <i>C<sub>A2</sub></i>) upon the correlation between SNRs for two radars (<i>C<sub>12</sub></i>), we show that both coefficients, <i>C<sub>A1</sub></i> and <i>C<sub>A2</sub></i>, and the agreement between them decrease drastically with a <i>C<sub>12</sub></i> decrease, which we interpreted through the progressively increasing role of the spatial inhomogeneity of the processes leading to the enhanced CNA and SNR. In this situation, a similarity between the radio signal collection areas should become important, and we demonstrate that the HCP occurrence and mean correlation coefficient decrease as the riometer beams and radar cells become less comparable in terms of mutual orientation and closeness between the points of maximum sensitivity. <p> <b>Keywords.</b> Ionosphere (Auroral ionosphere; Particle precipitation; Instruments and techniques)
Mémoires en Sciences... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; Hal-DiderotOther literature type . Article . 2005Full-Text: https://hal.science/hal-00317806/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 2 citations 2 popularity Average influence Average impulse Average Powered by BIP!visibility 2visibility views 2 download downloads 32 Powered bymore_vert Mémoires en Sciences... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; Hal-DiderotOther literature type . Article . 2005Full-Text: https://hal.science/hal-00317806/documentadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2021 United States, Spain, Norway, France, France, United Kingdom, Italy, France, Portugal, Germany, Italy, Netherlands, Norway, France, France, Italy, Belgium, France, Denmark, France, GreecePublisher:Elsevier BV Funded by:FCT | LA 1FCT| LA 1Abdalla, S; Abdeh Kolahchi, A; Ablain, M; Adusumilli, S; Aich Bhowmick, S; Alou-Font, E; Amarouche, L; Andersen, OB; Antich, H; Aouf, L; Arbic, B; Armitage, T; Arnault, S; Artana, C; Aulicino, G; Ayoub, N; Badulin, S; Baker, S; Banks, C; Bao, L; Barbetta, S; Barceló-Llull, B; Barlier, F; Basu, S; Bauer-Gottwein, P; Becker, M; Beckley, B; Bellefond, N; Belonenko, T; Benkiran, M; Benkouider, T; Bennartz, R; Benveniste, J; Bercher, N; Berge-Nguyen, M; Bettencourt, J; Blarel, F; Blazquez, A; Blumstein, D; Bonnefond, P; Borde, F; Bouffard, J; Boy, F; Boy, J-P; Brachet, C; Brasseur, P; Braun, A; Brocca, L; Brockley, D; Brodeau, L; Brown, S; Bruinsma, S; Bulczak, A; Buzzard, S; Cahill, M; Calmant, S; Calzas, M; Camici, S; Cancet, M; Capdeville, H; Carabajal, CC; Carrere, L; Cazenave, A; Chassignet, EP; Chauhan, P; Cherchali, S; Chereskin, T; Cheymol, C; Ciani, D; Cipollini, P; Cirillo, F; Cosme, E; Coss, S; Cotroneo, Y; Cotton, D; Couhert, A; Coutin-Faye, S; Crétaux, J-F; Cyr, F; d’Ovidio, F; Darrozes, J; David, C; Dayoub, N; De Staerke, D; Deng, X; Desai, S; Desjonqueres, J-D; Dettmering, D; Di Bella, A; Díaz-Barroso, L; Dibarboure, G; Dieng, HB; Dinardo, S; Dobslaw, H; Dodet, G; Doglioli, A; Domeneghetti, A; Donahue, D; Dong, S; Donlon, C; Dorandeu, J; Drezen, C; Drinkwater, M; Du Penhoat, Y; Dushaw, B; Egido, A; Erofeeva, S; Escudier, P; Esselborn, S; Exertier, P; Fablet, R; Falco, C; Farrell, SL; Faugere, Y; Femenias, P; Fenoglio, L; Fernandes, J; Fernández, JG; Ferrage, P; Ferrari, R; Fichen, L; Filippucci, P; Flampouris, S; Fleury, S; Fornari, M; Forsberg, R; Frappart, F; Frery, M-L; Garcia, P; Garcia-Mondejar, A; Gaudelli, J; Gaultier, L; Getirana, A; Gibert, F; Gil, A; Gilbert, L; Gille, S; Giulicchi, L; Gómez-Enri, J; Gómez-Navarro, L; Gommenginger, C; Gourdeau, L; Griffin, D; Groh, A; Guerin, A; Guerrero, R; Guinle, T; Gupta, P; Gutknecht, BD; Hamon, M; Han, G; Hauser, D; Helm, V; Hendricks, S; Hernandez, F; Hogg, A; Horwath, M; Idžanović, M; Janssen, P; Jeansou, E; Jia, Y; Jia, Y; Jiang, L; Johannessen, JA; Kamachi, M; Karimova, S; Kelly, K; Kim, SY; King, R; Kittel, CMM; Klein, P; Klos, A; Knudsen, P; Koenig, R; Kostianoy, A; Kouraev, A; Kumar, R; Labroue, S; Lago, LS; Lambin, J; Lasson, L; Laurain, O; Laxenaire, R; Lázaro, C; Le Gac, S; Le Sommer, J; Le Traon, P-Y; Lebedev, S; Léger, F; Legresy, B; Lemoine, F; Lenain, L; Leuliette, E; Levy, M; Lillibridge, J; Liu, J; Llovel, W; Lyard, F; Macintosh, C; Makhoul Varona, E; Otosaka, I; Shepherd, A; Slater, T; Zinchenko, V;handle: 10183/232861 , 11250/2993562 , 10261/256675 , 10400.3/6058 , 11367/94370
In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th (2012) years of progress and more recently, in 2018, in Ponta Delgada, Portugal, 25 Years of Progress in Radar Altimetry. On this latter occasion it was decided to collect contributions of scientists, engineers and managers involved in the worldwide altimetry community to depict the state of altimetry and propose recommendations for the altimetry of the future. This paper summarizes contributions and recommendations that were collected and provides guidance for future mission design, research activities, and sustainable operational radar altimetry data exploitation. Recommendations provided are fundamental for optimizing further scientific and operational advances of oceanographic observations by altimetry, including requirements for spatial and temporal resolution of altimetric measurements, their accuracy and continuity. There are also new challenges and new openings mentioned in the paper that are particularly crucial for observations at higher latitudes, for coastal oceanography, for cryospheric studies and for hydrology. The paper starts with a general introduction followed by a section on Earth System Science including Ocean Dynamics, Sea Level, the Coastal Ocean, Hydrology, the Cryosphere and Polar Oceans and the “Green” Ocean, extending the frontier from biogeochemistry to marine ecology. Applications are described in a subsequent section, which covers Operational Oceanography, Weather, Hurricane Wave and Wind Forecasting, Climate projection. Instruments’ development and satellite missions’ evolutions are described in a fourth section. A fifth section covers the key observations that altimeters provide and their potential complements, from other Earth observation measurements to in situ data. Section 6 identifies the data and methods and provides some accuracy and resolution requirements for the wet tropospheric correction, the orbit and other geodetic requirements, the Mean Sea Surface, Geoid and Mean Dynamic Topography, Calibration and Validation, data accuracy, data access and handling (including the DUACS system). Section 7 brings a transversal view on scales, integration, artificial intelligence, and capacity building (education and training). Section 8 reviews the programmatic issues followed by a conclusion. At the forefront of this support, we must obviously mention the space agencies CNES, ESA and NASA which have played and still play a decisive role in the development and launch of several prominent altimetry missions from the outset. Other agencies such as DLR, EUMETSAT, ISRO, NOAA, NSOAS and organizations such as CMEMS, also contribute significantly to developments in all forms of altimetry. International Altimetry Team.
CORE (RIOXX-UK Aggre... arrow_drop_down CORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NERC Open Research Archive; Advances in Space ResearchArticle . 2021 . Peer-reviewedLicense: CC BY NC NDCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCISArticle . 2021Full-Text: https://ris.utwente.nl/ws/files/266406341/Abdalla_2021_Altimetry_for_the_future_building_o.pdfData sources: NARCISHAL CY Cergy Paris Université; HAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRDArticle . 2021License: CC BY NDAdvances in Space ResearchArticle . 2021Full-Text: https://ezproxy2.utwente.nl/login?url=https://library.itc.utwente.nl/login/2021/isi/su_alt.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCIS; TU Delft RepositoryArticle . 2021eScholarship - University of CaliforniaArticle . 2021Data sources: eScholarship - University of CaliforniaBrage NMBU; Norwegian Open Research ArchivesArticle . 2021Institutional Repository of the Technical University of Crete (DIAS)Article . Peer-reviewedGFZ German Research Centre for GeosciencesArticle . 2021License: CC BY NC NDData sources: GFZ German Research Centre for GeosciencesArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerOnline Research Database In TechnologyArticle . 2021Data sources: Online Research Database In Technologyadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 108 citations 108 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 194visibility views 194 download downloads 153 Powered bymore_vert CORE (RIOXX-UK Aggre... arrow_drop_down CORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NERC Open Research Archive; Advances in Space ResearchArticle . 2021 . Peer-reviewedLicense: CC BY NC NDCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCISArticle . 2021Full-Text: https://ris.utwente.nl/ws/files/266406341/Abdalla_2021_Altimetry_for_the_future_building_o.pdfData sources: NARCISHAL CY Cergy Paris Université; HAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRDArticle . 2021License: CC BY NDAdvances in Space ResearchArticle . 2021Full-Text: https://ezproxy2.utwente.nl/login?url=https://library.itc.utwente.nl/login/2021/isi/su_alt.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCIS; TU Delft RepositoryArticle . 2021eScholarship - University of CaliforniaArticle . 2021Data sources: eScholarship - University of CaliforniaBrage NMBU; Norwegian Open Research ArchivesArticle . 2021Institutional Repository of the Technical University of Crete (DIAS)Article . Peer-reviewedGFZ German Research Centre for GeosciencesArticle . 2021License: CC BY NC NDData sources: GFZ German Research Centre for GeosciencesArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerOnline Research Database In TechnologyArticle . 2021Data sources: Online Research Database In Technologyadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Other literature type , Article 2016 United States, Switzerland, France, Finland, France, FinlandPublisher:American Association for the Advancement of Science (AAAS) Funded by:EC | nanoCAVa, AKA | Formation and growth of a..., AKA | ATMOSPHERIC SCIENCES - Pa... +16 projectsEC| nanoCAVa ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,AKA| ATMOSPHERIC SCIENCES - Particularly for determination of cluster and nanoaerosol composition ,AKA| Measurement of Nano-particle Nucelation in the Atmosphere via Cluster Ion Mass Spectrometry ,FCT| Collaboration in the CLOUD experiment ,SNSF| Investigation of new particle formation in the CLOUD chamber at CERN and the PSI smog chamber ,AKA| Nanoaerosol synthesis for bridging laboratory and field investigations of new particle formation and growth ,AKA| Formation and growth of atmospheric aerosol particles: from molecular to global scale ,FWF| Chemical Characterization of Organic Nanoparticles ,UKRI| E-Infrastructure Interconnectivity EPSRC - Chris Taylor ,AKA| Infrastructure of Environmental and Atmospheric Sciences (ATM-Science) ,SNSF| CLOUD ,SNSF| FORCE Proposal to Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,EC| ATMNUCLE ,AKA| Computational research chain from quantum chemistry to climate change / Consortium: ComQuaCC ,AKA| Nucleation of particles and ice in the atmosphere: from surface layer to upper troposphere ,SNSF| Investigation of Secondary Organic Aerosol Formation in the PSI Smog Chamber and at CERN ,UKRI| Global Aerosol Synthesis and Science Project (GASSP) to reduce the uncertainty in aerosol radiative forcing ,SNSF| Molecular Imaging of CNS-Immune System Interactions in Multiple SclerosisEimear M. Dunne; Hamish Gordon; Andreas Kürten; Joao Almeida; Jonathan Duplissy; Christina Williamson; Ismael K. Ortega; Kirsty J. Pringle; Alexey Adamov; Urs Baltensperger; Peter Barmet; Francois Benduhn; F. Bianchi; Martin Breitenlechner; Antony D. Clarke; Joachim Curtius; Josef Dommen; Neil M. Donahue; Sebastian Ehrhart; Richard C. Flagan; Alessandro Franchin; Roberto Guida; Jani Hakala; Armin Hansel; Martin Heinritzi; Tuija Jokinen; Juha Kangasluoma; Jasper Kirkby; Markku Kulmala; Agnieszka Kupc; Michael J. Lawler; Katrianne Lehtipalo; Vladimir Makhmutov; Graham Mann; Serge Mathot; Joonas Merikanto; Pasi Miettinen; Athanasios Nenes; Antti Onnela; Alexandru Rap; Carly Reddington; Francesco Riccobono; N. A. D. Richards; Matti P. Rissanen; Linda Rondo; Nina Sarnela; Siegfried Schobesberger; Kamalika Sengupta; Mario Simon; Mikko Sipilä; James N. Smith; Yuri Stozkhov; António Tomé; Jasmin Tröstl; Paul E. Wagner; Daniela Wimmer; Paul M. Winkler; Douglas R. Worsnop; Kenneth S. Carslaw;pmid: 27789796
New particle formation in the atmosphere produces around half of the cloud condensation nuclei that seed cloud droplets. Such particles have a pivotal role in determining the properties of clouds and the global radiation balance. Dunne et al. used the CLOUD (Cosmics Leaving Outdoor Droplets) chamber at CERN to construct a model of aerosol formation based on laboratory measured nucleation rates. They found that nearly all nucleation involves either ammonia or biogenic organic compounds. Furthermore in the present day atmosphere cosmic ray intensity cannot meaningfully affect climate via nucleation.Science this issue p. 1119Fundamental questions remain about the origin of newly formed atmospheric aerosol particles because data from laboratory measurements have been insufficient to build global models. In contrast gas phase chemistry models have been based on laboratory kinetics measurements for decades. We built a global model of aerosol formation by using extensive laboratory measurements of rates of nucleation involving sulfuric acid ammonia ions and organic compounds conducted in the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber. The simulations and a comparison with atmospheric observations show that nearly all nucleation throughout the present day atmosphere involves ammonia or biogenic organic compounds in addition to sulfuric acid. A considerable fraction of nucleation involves ions but the relatively weak dependence on ion concentrations indicates that for the processes studied variations in cosmic ray intensity do not appreciably affect climate through nucleation in the present day atmosphere.U http://science.sciencemag.org/content/sci/354/6316/1119.full.pdf
Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 276 citations 276 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 34visibility views 34 download downloads 740 Powered bymore_vert Science arrow_drop_down ScienceOther literature type . Article . 2016 . Peer-reviewedCaltech AuthorsArticle . 2016 . Peer-reviewedFull-Text: https://authors.library.caltech.edu/71775/5/Global%20atmospheric%20particle%20formation.pdfData sources: Caltech AuthorsInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2021 Netherlands, Belgium, FrancePublisher:Elsevier BV Leon T. Hauser; Jean-Baptiste Féret; Nguyen An Binh; Niels van der Windt; Ângelo Filipe dos Reis Pereira e Cortinhas Sil; J. Timmermans; Nadejda A. Soudzilovskaia; Peter M. van Bodegom;Large-scale high-resolution satellite observations of plant functional diversity patterns will greatly benefit our ability to study ecosystem functioning. Here, we demonstrate a potentially scalable approach that uses aggregate plant traits estimated from radiative transfer model (RTM) inversion of Sentinel-2 satellite images to calculate community patterns of plant functional diversity. Trait retrieval relied on simulations and Look-up Tables (LUTs) generated by a RTM rather than heavily depending on a priori field data and data-driven statistical learning. This independence from in-situ training data benefits its scalability as relevant field data remains scarce and difficult to acquire. We ran a total of three different inversion algorithms that are representative of commonly applied approaches and we used two different metrics to calculate functional diversity. In tandem with Sentinel-2 image-based estimation of plant traits, we measured Leaf Area Index (LAI), leaf Chlorophyll content (CAB), and Leaf Mass per Area (LMA) in-situ in a (semi-)natural heterogeneous landscape (Montesinho region) located in northern Portugal. Sampling plots were scaled and georeferenced to match the satellite observed pixels and thereby allowed for a direct one-to-one posterior ground truth validation of individual traits and functional diversity. Across approaches, we observe a reasonable correspondence between the satellite-based retrievals and the insitu observations in terms of the relative distribution of individual trait means and plant functional diversity across locations despite the heterogeneity of the landscape and canopies. The functional diversity estimates, based on a combination of canopy and leaf traits, were robust against estimation biases in trait means. Particularly, the convex hull volume estimate of functional diversity showed strong concordance with in-situ observations across all three inversion methods (Spearman's rho: 0.67-0.80). The remotely sensed estimates of functional diversity also related to in-situ taxonomic diversity (Spearman's rho: 0.55-0.63). Our work highlights the potential and challenges of RTM-based functional diversity metrics to study spatial community-level ecological patterns using currently operational and publicly available Sentinel-2 imagery. While further validation and assessment across different ecosystems and larger datasets are needed, the study contributes towards a further maturation of scalable, spatially, and temporally explicit methods for functional diversity assessments from space. The authors would like to acknowledge Christian Rossi, Prof. Geof-frey M. Henebry, and the anonymous reviewers for their valuable comments and suggestions that greatly improved the manuscript. This work was supported financially by the Ecology Fund of the RoyalNetherlands Academy of Arts and Sciences (‘KNAW Fonds Ecologie’; KNAWWF/807/19011). We thank Altino Geraldes, Joao Carlos Aze-vedo, and the local farmers and foresters in the Montesinho-Nogueira Natura 2000 site for their help and collaboration. We thank Emilie Didaskalou for her lab assistance. J.-B. F ́eret acknowledges financial support from Agence Nationale de la Recherche (BioCop project—ANR- 17-32CE-0001).
NARCIS arrow_drop_down Leiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications RepositoryMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . 2021License: CC BYFull-Text: https://hal.inrae.fr/hal-03245246/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.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 23 citations 23 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert NARCIS arrow_drop_down Leiden University Scholarly Publications RepositoryOther literature type . 2021License: CC BYData sources: Leiden University Scholarly Publications RepositoryMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . 2021License: CC BYFull-Text: https://hal.inrae.fr/hal-03245246/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.2021.112505&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2018 France, France, United KingdomPublisher:Springer Science and Business Media LLC Stephen R. Rintoul; Steven L. Chown; Robert M. DeConto; Matthew H. England; Helen A. Fricker; Valérie Masson-Delmotte; Tim R Naish; Martin J. Siegert; José C. Xavier;pmid: 30018346
We present two narratives on the future of Antarctica and the Southern Ocean, from the perspective of an observer looking back from 2070. In the first scenario, greenhouse gas emissions remained unchecked, the climate continued to warm, and the policy response was ineffective; this had large ramifications in Antarctica and the Southern Ocean, with worldwide impacts. In the second scenario, ambitious action was taken to limit greenhouse gas emissions and to establish policies that reduced anthropogenic pressure on the environment, slowing the rate of change in Antarctica. Choices made in the next decade will determine what trajectory is realized.
add 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=10.1038/s41586-018-0173-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 162 citations 162 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 115visibility views 115 download downloads 238 Powered bymore_vert add 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=10.1038/s41586-018-0173-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2016 Italy, France, France, France, France, Italy, Germany, France, MaltaPublisher:American Geophysical Union (AGU) Funded by:EC | SCARP, EC | ASTARTEEC| SCARP ,EC| ASTARTEAuthors: Marc-André Gutscher; Stéphane Dominguez; Bernard Mercier de Lépinay; Luis M. Pinheiro; +7 AuthorsMarc-André Gutscher; Stéphane Dominguez; Bernard Mercier de Lépinay; Luis M. Pinheiro; Flora Gallais; Nathalie Babonneau; Antonio Cattaneo; Yann Le Faou; Giovanni Barreca; Aaron Micallef; Marzia Rovere;doi: 10.1002/2015tc003898
handle: 20.500.11769/497146
Subduction of a narrow slab of oceanic lithosphere beneath a tightly curved orogenic arc requires the presence of at least one lithospheric scale tear fault. While the Calabrian subduction beneath southern Italy is considered to be the type example of this geodynamic setting, the geometry, kinematics and surface expression of the associated lateral, slab tear fault offshore eastern Sicily remain controversial. Results from a new marine geophysical survey conducted in the Ionian Sea, using high-resolution bathymetry and seismic profiling reveal active faulting at the seafloor within a 140 km long, two-branched fault system near Alfeo Seamount. The previously unidentified 60 km long NW trending North Alfeo Fault system shows primarily strike-slip kinematics as indicated by the morphology and steep-dipping transpressional and transtensional faults. Available earthquake focal mechanisms indicate dextral strike-slip motion along this fault segment. The 80 km long SSE trending South Alfeo fault system is expressed by one or two steeply dipping normal faults, bounding the western side of a 500+ m thick, 5 km wide, elongate, syntectonic Plio-Quaternary sedimentary basin. Both branches of the fault system are mechanically capable of generating magnitude 6–7 earthquakes like those that struck eastern Sicily in 1169, 1542, and 1693. peer-reviewed
IRIS - Università de... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2016Data sources: ArchiMer - Institutional Archive of IfremerIRIS - Università degli Studi di CataniaArticle . 2016Data sources: IRIS - Università degli Studi di Cataniahttps://doi.org/10.1002/2015TC...Other literature typeData sources: European Union Open Data Portaladd 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=10.1002/2015tc003898&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 75 citations 75 popularity Top 10% influence Top 10% impulse Top 1% Powered by BIP!visibility 13visibility views 13 download downloads 3 Powered bymore_vert IRIS - Università de... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2016Data sources: ArchiMer - Institutional Archive of IfremerIRIS - Università degli Studi di CataniaArticle . 2016Data sources: IRIS - Università degli Studi di Cataniahttps://doi.org/10.1002/2015TC...Other literature typeData sources: European Union Open Data Portaladd 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=10.1002/2015tc003898&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Preprint 2012 FrancePublisher:Copernicus GmbH Authors: Bashmachnikov, I.; Carton, X.;Bashmachnikov, I.; Carton, X.;Abstract. Meddies, intra-thermocline eddies of Mediterranean water, can often be detected at the sea surface as positive sea-level anomalies. Here we study the surface signature of several meddies tracked with RAFOS floats and AVISO altimetry. While pushing its way through the water column, a meddy raises isopycnals above. As a consequence of potential vorticity conservation, negative relative vorticity is generated in the upper layer. During the initial period of meddy acceleration after meddy formation or after a stagnation stage, a cyclonic signal is also generated at the sea-surface, but mostly the anticyclonic surface signal follows the meddy. Based on geostrophy and potential vorticity balance, we present theoretical estimates of the intensity of the surface signature. It appears to be proportional to the meddy core radius and to the Coriolis parameter, and inversely proportional to the core depth and buoyancy frequency. This indicates that surface signature of a meddy may be strongly reduced by the upper ocean stratification. Using climatic distribution of the stratification intensity, we claim that the southernmost limit for detection in altimetry of small meddies (with radii on the order of 10–15 km) should lie in the subtropics (35–45° N), while large meddies (with radii of 25–30 km) could be detected as far south as the northern tropics (25–35° N). Those results agree with observations.
Ocean Science arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2012Data sources: ArchiMer - Institutional Archive of Ifremeradd 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/osd-9-2457-2012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 28 citations 28 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 11visibility views 11 download downloads 4 Powered bymore_vert Ocean Science arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2012Data sources: ArchiMer - Institutional Archive of Ifremeradd 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/osd-9-2457-2012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 1999 FrancePublisher:EDP Sciences Funded by:FCT | D4FCT| D4Authors: Wong, T. F.; Baud, P.;Wong, T. F.; Baud, P.;doi: 10.2516/ogst:1999061
International audience; In many reservoir engineering and tectonic problems, the ability to predict both the occurrence and extent of inelastic deformation and failure hinges upon a fundamental understanding of the phenomenology and micromechanics of compaction in reservoir rock. This paper reviews recent research advances on mechanical compaction of porous sandstone, with focus on the synthesis of laboratory data, quantitative microstructural characterization of damage, and theoretical models based on elastic contact and fracture mechanics. The mechanical attributes of compaction in nominally dry and saturated samples have been studied under hydrostatic and nonhydrostatic loadings over a broad range of pressure conditions. Specific topics reviewed herein include: comparison of mechanical and acoustic emission data with continuum plasticity theory; microstructural control of onset and development of compaction; strain hardening and spatial evolution of damage during compaction; and the weakening effect of water on compactive yield and porosity change.
Oil & Gas Scienc... arrow_drop_down Mémoires en Sciences de l'Information et de la CommunicationArticle . 1999License: CC BYFull-Text: https://hal.science/hal-02075856/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=10.2516/ogst:1999061&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 91 citations 91 popularity Top 10% influence Top 10% impulse Average Powered by BIP!more_vert Oil & Gas Scienc... arrow_drop_down Mémoires en Sciences de l'Information et de la CommunicationArticle . 1999License: CC BYFull-Text: https://hal.science/hal-02075856/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=10.2516/ogst:1999061&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2014 FrancePublisher:Elsevier BV Funded by:FCT | D4FCT| D4Moreau , Jean-David; Fara , Emmanuel; Gand , Georges; Lafaurie , Gérard; Baret , Louis;International audience; An abundant ichnological material composed of xiphosuran trackways and isolated traces was discovered in Upper Jurassic limestones from the Causses Basin (Causse Méjean, Lozère, France). The morphology of the imprints supports their identification as Kouphichnium isp. In contrast to the most frequent case, the trackways are composed of omnipresent pusher imprints sometime associated with leg traces, but with no telson mark. We argue that this pattern reflects actual surface traces rather than an incomplete set of undertracks. The size distribution of the sampled ichnites is broadly bimodal. This is best explained by sexual dimorphism, a phenomenon frequently observed in modern xiphosurans. Analysis of the trace fossils further suggests that several growth stages are recorded and that the horseshoe crabs were walking in a protected and flat environment like a lagoon. This area, certainly close to a mating ground, was occasionally affected by a continental influence. The biometric study of the tracks suggests a gigantic size for the trackmakers whose body may have reached 84 cm in length. This discovery complements the few reports on other gigantic horseshoe crabs in the Jurassic of Western Europe, thus casting doubt on the postulated increase in body size from the Palaeozoic to the Recent. Furthermore, a literature review shows that there are still major gaps in the record of limulid body-fossils and tracks. Thus, neither of these archives can be taken at face value for quantifying the body-size evolution of horseshoe crabs.
add 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.geobios.2014.06.005&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 13 citations 13 popularity Average influence Average impulse Average Powered by BIP!more_vert add 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.geobios.2014.06.005&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2014 France EnglishPublisher:HAL CCSD Funded by:FCT | D4FCT| D4Deshmukh, C.; Serça, Dominique; Delon, Claire; Tardif, R.; Demarty, M.; Jarnot, C.; Meyerfeld, Y.; Chanudet, V.; Guédant, P.; Rode, W.; Descloux, S.; Guérin, F.;In the present study, we measured independently CH4 ebullition and diffusion in the footprint of an eddy covariance system (EC) measuring CH4 emissions in the Nam Theun 2 Reservoir, a recently impounded (2008) subtropical hydroelectric reservoir located in the Lao People's Democratic Republic (PDR), Southeast Asia. The EC fluxes were very consistent with the sum of the two terms measured independently (diffusive fluxes + ebullition = EC fluxes), indicating that the EC system picked up both diffusive fluxes and ebullition from the reservoir. We showed a diurnal bimodal pattern of CH4 emissions anti-correlated with atmospheric pressure. During daytime, a large atmospheric pressure drop triggers CH4 ebullition (up to 100 mmol m−2 d−1), whereas at night, a more moderate peak of CH4 emissions was recorded. As a consequence, fluxes during daytime were twice as high as during nighttime. Additionally, more than 4800 discrete measurements of CH4 ebullition were performed at a weekly/fortnightly frequency, covering water depths ranging from 0.4 to 16 m and various types of flooded ecosystems. Methane ebullition varies significantly seasonally and depends mostly on water level change during the warm dry season, whereas no relationship was observed during the cold dry season. On average, ebullition was 8.5 ± 10.5 mmol m−2 d−1 and ranged from 0 to 201.7 mmol m−2 d−1. An artificial neural network (ANN) model could explain up to 46% of seasonal variability of ebullition by considering total static pressure (the sum of hydrostatic and atmospheric pressure), variations in the total static pressure, and bottom temperature as controlling factors. This model allowed extrapolation of CH4 ebullition on the reservoir scale and performance of gap filling over four years. Our results clearly showed a very high seasonality: 50% of the yearly CH4 ebullition occurs within four months of the warm dry season. Overall, ebullition contributed 60–80% of total emissions from the surface of the reservoir (disregarding downstream emissions), suggesting that ebullition is a major pathway in young hydroelectric reservoirs in the tropics.
Horizon / Pleins tex... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2014License: CC BYFull-Text: https://hal.science/hal-03026379/documentAll 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______2592::190a05d92d8c60bcb5f9c557bede6b54&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 Horizon / Pleins tex... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; HAL-IRDArticle . 2014License: CC BYFull-Text: https://hal.science/hal-03026379/documentAll 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______2592::190a05d92d8c60bcb5f9c557bede6b54&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2005 France, United KingdomPublisher:Copernicus GmbH Funded by:FCT | LA 1FCT| LA 1Authors: R. A. Makarevitch; R. A. Makarevitch; F. Honary;R. A. Makarevitch; R. A. Makarevitch; F. Honary;We present examples and statistical analysis of the events with statistically significant correlation between the cosmic noise absorption (CNA) and the signal-to-noise ratio (SNR) of the VHF coherent echo intensity in the area monitored simultaneously by an imaging riometer and two oblique-sounding coherent VHF radars in Northern Scandinavia. By only considering the observations from the narrow riometer beams comparable (in terms of the intersection with the ionosphere) with the VHF radar cells, we identify ~200 one-hour high correlation periods (HCPs) for 2 years near the solar cycle maximum, 2000–2001. The HCP occurrence is maximized in the afternoon (12:00–17:00 UT, MLT≅UT+3), with the secondary peak near the midnight (21:00–02:00 UT). Relative to the VHF echo occurrence, HCPs occur more frequently from 11:00 to 20:00 UT. The diurnal variation of HCP occurrence is similar to that of the 1-h intervals with the lowest mean absorption <i>A</i><0.25dB. </p><p style="line-height: 20px;"> The HCPs are observed more frequently during the winter months, which, combined with the fact that VHF echoes observed during HCPs exhibit features typical for field-aligned E-region irregularities, makes their association with the polar mesospheric echoes (for which some positive CNA/SNR correlation has been reported in the past) very unlikely. Instead, we attribute the high positive CNA/SNR correlation to the synchronous, to a first approximation, variation of the particle fluxes for two different but close sets of energies. </p><p style="line-height: 20px;"> By considering the dependence of the CNA/SNR correlation coefficients for both VHF radars (<i>C<sub>A1</sub></i> and <i>C<sub>A2</sub></i>) upon the correlation between SNRs for two radars (<i>C<sub>12</sub></i>), we show that both coefficients, <i>C<sub>A1</sub></i> and <i>C<sub>A2</sub></i>, and the agreement between them decrease drastically with a <i>C<sub>12</sub></i> decrease, which we interpreted through the progressively increasing role of the spatial inhomogeneity of the processes leading to the enhanced CNA and SNR. In this situation, a similarity between the radio signal collection areas should become important, and we demonstrate that the HCP occurrence and mean correlation coefficient decrease as the riometer beams and radar cells become less comparable in terms of mutual orientation and closeness between the points of maximum sensitivity. <p> <b>Keywords.</b> Ionosphere (Auroral ionosphere; Particle precipitation; Instruments and techniques)
Mémoires en Sciences... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; Hal-DiderotOther literature type . Article . 2005Full-Text: https://hal.science/hal-00317806/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/angeo-23-1543-2005&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 2 citations 2 popularity Average influence Average impulse Average Powered by BIP!visibility 2visibility views 2 download downloads 32 Powered bymore_vert Mémoires en Sciences... arrow_drop_down Mémoires en Sciences de l'Information et de la Communication; Hal-DiderotOther literature type . Article . 2005Full-Text: https://hal.science/hal-00317806/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.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2021 United States, Spain, Norway, France, France, United Kingdom, Italy, France, Portugal, Germany, Italy, Netherlands, Norway, France, France, Italy, Belgium, France, Denmark, France, GreecePublisher:Elsevier BV Funded by:FCT | LA 1FCT| LA 1Abdalla, S; Abdeh Kolahchi, A; Ablain, M; Adusumilli, S; Aich Bhowmick, S; Alou-Font, E; Amarouche, L; Andersen, OB; Antich, H; Aouf, L; Arbic, B; Armitage, T; Arnault, S; Artana, C; Aulicino, G; Ayoub, N; Badulin, S; Baker, S; Banks, C; Bao, L; Barbetta, S; Barceló-Llull, B; Barlier, F; Basu, S; Bauer-Gottwein, P; Becker, M; Beckley, B; Bellefond, N; Belonenko, T; Benkiran, M; Benkouider, T; Bennartz, R; Benveniste, J; Bercher, N; Berge-Nguyen, M; Bettencourt, J; Blarel, F; Blazquez, A; Blumstein, D; Bonnefond, P; Borde, F; Bouffard, J; Boy, F; Boy, J-P; Brachet, C; Brasseur, P; Braun, A; Brocca, L; Brockley, D; Brodeau, L; Brown, S; Bruinsma, S; Bulczak, A; Buzzard, S; Cahill, M; Calmant, S; Calzas, M; Camici, S; Cancet, M; Capdeville, H; Carabajal, CC; Carrere, L; Cazenave, A; Chassignet, EP; Chauhan, P; Cherchali, S; Chereskin, T; Cheymol, C; Ciani, D; Cipollini, P; Cirillo, F; Cosme, E; Coss, S; Cotroneo, Y; Cotton, D; Couhert, A; Coutin-Faye, S; Crétaux, J-F; Cyr, F; d’Ovidio, F; Darrozes, J; David, C; Dayoub, N; De Staerke, D; Deng, X; Desai, S; Desjonqueres, J-D; Dettmering, D; Di Bella, A; Díaz-Barroso, L; Dibarboure, G; Dieng, HB; Dinardo, S; Dobslaw, H; Dodet, G; Doglioli, A; Domeneghetti, A; Donahue, D; Dong, S; Donlon, C; Dorandeu, J; Drezen, C; Drinkwater, M; Du Penhoat, Y; Dushaw, B; Egido, A; Erofeeva, S; Escudier, P; Esselborn, S; Exertier, P; Fablet, R; Falco, C; Farrell, SL; Faugere, Y; Femenias, P; Fenoglio, L; Fernandes, J; Fernández, JG; Ferrage, P; Ferrari, R; Fichen, L; Filippucci, P; Flampouris, S; Fleury, S; Fornari, M; Forsberg, R; Frappart, F; Frery, M-L; Garcia, P; Garcia-Mondejar, A; Gaudelli, J; Gaultier, L; Getirana, A; Gibert, F; Gil, A; Gilbert, L; Gille, S; Giulicchi, L; Gómez-Enri, J; Gómez-Navarro, L; Gommenginger, C; Gourdeau, L; Griffin, D; Groh, A; Guerin, A; Guerrero, R; Guinle, T; Gupta, P; Gutknecht, BD; Hamon, M; Han, G; Hauser, D; Helm, V; Hendricks, S; Hernandez, F; Hogg, A; Horwath, M; Idžanović, M; Janssen, P; Jeansou, E; Jia, Y; Jia, Y; Jiang, L; Johannessen, JA; Kamachi, M; Karimova, S; Kelly, K; Kim, SY; King, R; Kittel, CMM; Klein, P; Klos, A; Knudsen, P; Koenig, R; Kostianoy, A; Kouraev, A; Kumar, R; Labroue, S; Lago, LS; Lambin, J; Lasson, L; Laurain, O; Laxenaire, R; Lázaro, C; Le Gac, S; Le Sommer, J; Le Traon, P-Y; Lebedev, S; Léger, F; Legresy, B; Lemoine, F; Lenain, L; Leuliette, E; Levy, M; Lillibridge, J; Liu, J; Llovel, W; Lyard, F; Macintosh, C; Makhoul Varona, E; Otosaka, I; Shepherd, A; Slater, T; Zinchenko, V;handle: 10183/232861 , 11250/2993562 , 10261/256675 , 10400.3/6058 , 11367/94370
In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th (2012) years of progress and more recently, in 2018, in Ponta Delgada, Portugal, 25 Years of Progress in Radar Altimetry. On this latter occasion it was decided to collect contributions of scientists, engineers and managers involved in the worldwide altimetry community to depict the state of altimetry and propose recommendations for the altimetry of the future. This paper summarizes contributions and recommendations that were collected and provides guidance for future mission design, research activities, and sustainable operational radar altimetry data exploitation. Recommendations provided are fundamental for optimizing further scientific and operational advances of oceanographic observations by altimetry, including requirements for spatial and temporal resolution of altimetric measurements, their accuracy and continuity. There are also new challenges and new openings mentioned in the paper that are particularly crucial for observations at higher latitudes, for coastal oceanography, for cryospheric studies and for hydrology. The paper starts with a general introduction followed by a section on Earth System Science including Ocean Dynamics, Sea Level, the Coastal Ocean, Hydrology, the Cryosphere and Polar Oceans and the “Green” Ocean, extending the frontier from biogeochemistry to marine ecology. Applications are described in a subsequent section, which covers Operational Oceanography, Weather, Hurricane Wave and Wind Forecasting, Climate projection. Instruments’ development and satellite missions’ evolutions are described in a fourth section. A fifth section covers the key observations that altimeters provide and their potential complements, from other Earth observation measurements to in situ data. Section 6 identifies the data and methods and provides some accuracy and resolution requirements for the wet tropospheric correction, the orbit and other geodetic requirements, the Mean Sea Surface, Geoid and Mean Dynamic Topography, Calibration and Validation, data accuracy, data access and handling (including the DUACS system). Section 7 brings a transversal view on scales, integration, artificial intelligence, and capacity building (education and training). Section 8 reviews the programmatic issues followed by a conclusion. At the forefront of this support, we must obviously mention the space agencies CNES, ESA and NASA which have played and still play a decisive role in the development and launch of several prominent altimetry missions from the outset. Other agencies such as DLR, EUMETSAT, ISRO, NOAA, NSOAS and organizations such as CMEMS, also contribute significantly to developments in all forms of altimetry. International Altimetry Team.
CORE (RIOXX-UK Aggre... arrow_drop_down CORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NERC Open Research Archive; Advances in Space ResearchArticle . 2021 . Peer-reviewedLicense: CC BY NC NDCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCISArticle . 2021Full-Text: https://ris.utwente.nl/ws/files/266406341/Abdalla_2021_Altimetry_for_the_future_building_o.pdfData sources: NARCISHAL CY Cergy Paris Université; HAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRDArticle . 2021License: CC BY NDAdvances in Space ResearchArticle . 2021Full-Text: https://ezproxy2.utwente.nl/login?url=https://library.itc.utwente.nl/login/2021/isi/su_alt.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCIS; TU Delft RepositoryArticle . 2021eScholarship - University of CaliforniaArticle . 2021Data sources: eScholarship - University of CaliforniaBrage NMBU; Norwegian Open Research ArchivesArticle . 2021Institutional Repository of the Technical University of Crete (DIAS)Article . Peer-reviewedGFZ German Research Centre for GeosciencesArticle . 2021License: CC BY NC NDData sources: GFZ German Research Centre for GeosciencesArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerOnline Research Database In TechnologyArticle . 2021Data sources: Online Research Database In Technologyadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 108 citations 108 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 194visibility views 194 download downloads 153 Powered bymore_vert CORE (RIOXX-UK Aggre... arrow_drop_down CORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NERC Open Research Archive; Advances in Space ResearchArticle . 2021 . Peer-reviewedLicense: CC BY NC NDCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCISArticle . 2021Full-Text: https://ris.utwente.nl/ws/files/266406341/Abdalla_2021_Altimetry_for_the_future_building_o.pdfData sources: NARCISHAL CY Cergy Paris Université; HAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-CEA; HAL-IRDArticle . 2021License: CC BY NDAdvances in Space ResearchArticle . 2021Full-Text: https://ezproxy2.utwente.nl/login?url=https://library.itc.utwente.nl/login/2021/isi/su_alt.pdfData sources: NARCISCORE (RIOXX-UK Aggregator)Article . 2021License: CC BY NC NDData sources: CORE (RIOXX-UK Aggregator)NARCIS; TU Delft RepositoryArticle . 2021eScholarship - University of CaliforniaArticle . 2021Data sources: eScholarship - University of CaliforniaBrage NMBU; Norwegian Open Research ArchivesArticle . 2021Institutional Repository of the Technical University of Crete (DIAS)Article . Peer-reviewedGFZ German Research Centre for GeosciencesArticle . 2021License: CC BY NC NDData sources: GFZ German Research Centre for GeosciencesArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerOnline Research Database In TechnologyArticle . 2021Data sources: Online Research Database In Technologyadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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