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description Publicationkeyboard_double_arrow_right Article , Other literature type 2020 Germany, United Kingdom, United Kingdom, France, Italy EnglishPublisher:HAL CCSD Funded by:NSF | Collaborative Research: ..., UKRI | EUREC4A-UK: Elucidating t..., SNSF | Large-scale circulation d... +6 projectsNSF| Collaborative Research: EUREC4A-iso--Constraining the Interplay between Clouds, Convection, and Circulation with Stable Isotopologues of Water Vapor ,UKRI| EUREC4A-UK: Elucidating the role of cloud-circulation coupling in climate ,SNSF| Large-scale circulation drivers and stable water isotope characteristics of low-level clouds over the tropical North Atlantic ,UKRI| EUREC4A-UK: Elucidating the role of cloud-circulation coupling in climate ,EC| TRIATLAS ,ANR| NEPHELAE ,EC| COMPASS ,EC| EUREC4A ,EC| CONSTRAINB. Stevens; S. Bony; D. Farrell; F. Ament; F. Ament; A. Blyth; C. Fairall; J. Karstensen; P. K. Quinn; S. Speich; C. Acquistapace; F. Aemisegger; A. L. Albright; H. Bellenger; E. Bodenschatz; K.-A. Caesar; R. Chewitt-Lucas; G. de Boer; G. de Boer; J. Delanoë; L. Denby; F. Ewald; B. Fildier; M. Forde; G. George; S. Gross; M. Hagen; A. Hausold; K. J. Heywood; L. Hirsch; M. Jacob; F. Jansen; S. Kinne; D. Klocke; T. Kölling; T. Kölling; H. Konow; M. Lothon; W. Mohr; A. K. Naumann; A. K. Naumann; L. Nuijens; L. Olivier; R. Pincus; R. Pincus; M. Pöhlker; G. Reverdin; G. Roberts; G. Roberts; S. Schnitt; H. Schulz; A. P. Siebesma; C. C. Stephan; P. Sullivan; L. Touzé-Peiffer; J. Vial; R. Vogel; P. Zuidema; N. Alexander; L. Alves; S. Arixi; H. Asmath; G. Bagheri; K. Baier; A. Bailey; D. Baranowski; A. Baron; S. Barrau; P. A. Barrett; F. Batier; A. Behrendt; A. Bendinger; F. Beucher; S. Bigorre; E. Blades; P. Blossey; O. Bock; S. Böing; P. Bosser; D. Bourras; P. Bouruet-Aubertot; K. Bower; P. Branellec; H. Branger; M. Brennek; A. Brewer; P.-E. Brilouet; B. Brügmann; S. A. Buehler; E. Burke; R. Burton; R. Calmer; J.-C. Canonici; X. Carton; G. Cato Jr.; J. A. Charles; P. Chazette; Y. Chen; M. T. Chilinski; T. Choularton; P. Chuang; S. Clarke; H. Coe; C. Cornet; P. Coutris; F. Couvreux; S. Crewell; T. Cronin; Z. Cui; Y. Cuypers; A. Daley; G. M. Damerell; T. Dauhut; H. Deneke; J.-P. Desbios; S. Dörner; S. Donner; V. Douet; K. Drushka; M. Dütsch; M. Dütsch; A. Ehrlich; K. Emanuel; A. Emmanouilidis; J.-C. Etienne; S. Etienne-Leblanc; G. Faure; G. Feingold; L. Ferrero; A. Fix; C. Flamant; P. J. Flatau; G. R. Foltz; L. Forster; I. Furtuna; A. Gadian; J. Galewsky; M. Gallagher; P. Gallimore; C. Gaston; C. Gentemann; N. Geyskens; A. Giez; J. Gollop; I. Gouirand; C. Gourbeyre; D. de Graaf; G. E. de Groot; R. Grosz; J. Güttler; M. Gutleben; K. Hall; G. Harris; K. C. Helfer; D. Henze; C. Herbert; B. Holanda; A. Ibanez-Landeta; J. Intrieri; S. Iyer; F. Julien; H. Kalesse; J. Kazil; J. Kazil; A. Kellman; A. T. Kidane; U. Kirchner; M. Klingebiel; M. Körner; L. A. Kremper; J. Kretzschmar; O. Krüger; W. Kumala; A. Kurz; P. L'Hégaret; M. Labaste; T. Lachlan-Cope; A. Laing; P. Landschützer; T. Lang; T. Lang; D. Lange; I. Lange; C. Laplace; G. Lavik; R. Laxenaire; C. Le Bihan; M. Leandro; N. Lefevre; M. Lena; D. Lenschow; Q. Li; G. Lloyd; S. Los; N. Losi; O. Lovell; C. Luneau; P. Makuch; S. Malinowski; G. Manta;The science guiding the EUREC4A campaign and its measurements is presented. EUREC4A comprised roughly 5 weeks of measurements in the downstream winter trades of the North Atlantic – eastward and southeastward of Barbados. Through its ability to characterize processes operating across a wide range of scales, EUREC4A marked a turning point in our ability to observationally study factors influencing clouds in the trades, how they will respond to warming, and their link to other components of the earth system, such as upper-ocean processes or the life cycle of particulate matter. This characterization was made possible by thousands (2500) of sondes distributed to measure circulations on meso- (200 km) and larger (500 km) scales, roughly 400 h of flight time by four heavily instrumented research aircraft; four global-class research vessels; an advanced ground-based cloud observatory; scores of autonomous observing platforms operating in the upper ocean (nearly 10 000 profiles), lower atmosphere (continuous profiling), and along the air–sea interface; a network of water stable isotopologue measurements; targeted tasking of satellite remote sensing; and modeling with a new generation of weather and climate models. In addition to providing an outline of the novel measurements and their composition into a unified and coordinated campaign, the six distinct scientific facets that EUREC4A explored – from North Brazil Current rings to turbulence-induced clustering of cloud droplets and its influence on warm-rain formation – are presented along with an overview of EUREC4A's outreach activities, environmental impact, and guidelines for scientific practice. Track data for all platforms are standardized and accessible at https://doi.org/10.25326/165 (Stevens, 2021), and a film documenting the campaign is provided as a video supplement.
HAL Clermont Univers... arrow_drop_down University of East Anglia digital repositoryArticle . 2021 . Peer-reviewedData sources: University of East Anglia digital repositoryArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerHAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-IRD; Hal-DiderotArticle . 2021 . 2020License: CC BY NCMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . Preprint . 2021add 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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert HAL Clermont Univers... arrow_drop_down University of East Anglia digital repositoryArticle . 2021 . Peer-reviewedData sources: University of East Anglia digital repositoryArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerHAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-IRD; Hal-DiderotArticle . 2021 . 2020License: CC BY NCMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . Preprint . 2021add 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 2017 Belgium, France EnglishPublisher:Humanities Commons Funded by:EC | PleisTechnoVar, ANR | Big DryEC| PleisTechnoVar ,ANR| Big DryAuthors: Leplongeon, Alice;Leplongeon, Alice;During the Nubia Salvage Campaign and the subsequent expeditions from the 1960's to the 1980's, numerous sites attributed to the Late Palaeolithic (~25-15 ka) were found in the Nile Valley, particularly in Nubia and Upper Egypt. This region is one of the few to have allowed human occupations during the dry Marine Isotope Stage 2 and is therefore key to understanding how human populations adapted to environmental changes at this time. This paper focuses on two sites located in Upper Egypt, excavated by the Combined Prehistoric Expedition: E71K18, attributed to the Afian industry and E71K20, attributed to the Silsilian industry. It aims to review the geomorphological and chronological evidence of the sites, present a technological analysis of the lithic assemblages in order to provide data that can be used in detailed comparative studies, which will allow discussion of technological variability in the Late Palaeolithic of the Nile Valley and its place within the regional context. The lithic analysis relies on the chaîne opératoire concept combined with an attribute analysis to allow quantification. This study (1) casts doubts on the chronology of E71K18 and related Afian industry, which could be older or younger than previously suggested, highlights (2) distinct technological characteristics for the Afian and the Silsilian, as well as (3) similar technological characteristics which allow to group them under a same broad techno-cultural complex, distinct from those north or south of the area. ispartof: PLOS ONE vol:12 issue:12 ispartof: location:United States status: published
Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2017Full-Text: http://europepmc.org/articles/PMC5744920Data sources: PubMed Centraladd 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=10.17613/8fjj-8d35&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2017Full-Text: http://europepmc.org/articles/PMC5744920Data sources: PubMed Centraladd 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=10.17613/8fjj-8d35&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2013 United Kingdom, Netherlands, France EnglishPublisher:Copernicus Publications Zuiderweg, A.; Holzinger, R.; Martinerie, Patricia; Schneider, R.; Kaiser, J.; Witrant, Emmanuel; Etheridge, D.; Petrenko, V.; Blunier, T.; Röckmann, T.;A series of 12 high volume air samples collected from the S2 firn core during the North Greenland Eemian Ice Drilling (NEEM) 2009 campaign have been measured for mixing ratio and stable carbon isotope composition of the chlorofluorocarbon CFC-12 (CCl2F2). While the mixing ratio measurements compare favorably to other firn air studies, the isotope results show extreme 13C depletion at the deepest measurable depth (65 m), to values lower than δ13C = −80‰ vs. VPDB (the international stable carbon isotope scale), compared to present day surface tropospheric measurements near −40‰. Firn air modeling was used to interpret these measurements. Reconstructed atmospheric time series indicate even larger depletions (to −120‰) near 1950 AD, with subsequent rapid enrichment of the atmospheric reservoir of the compound to the present day value. Mass-balance calculations show that this change is likely to have been caused by a large change in the isotopic composition of anthropogenic CFC-12 emissions, probably due to technological advances in the CFC production process over the last 80 yr, though direct evidence is lacking.
University of East A... arrow_drop_down University of East Anglia digital repositoryArticle . 2013 . Peer-reviewedData sources: University of East Anglia digital repositoryMémoires en Sciences de l'Information et de la CommunicationArticle . 2013License: CC BYFull-Text: https://hal.science/hal-00821219/documentHAL Descartes; HAL - UPEC / UPEM; HAL-Pasteur; HAL-Inserm; Hal-DiderotArticle . 2013License: CC BYAll 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_______101::aee3989396d0d9937d1db821bf67acb5&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 University of East A... arrow_drop_down University of East Anglia digital repositoryArticle . 2013 . Peer-reviewedData sources: University of East Anglia digital repositoryMémoires en Sciences de l'Information et de la CommunicationArticle . 2013License: CC BYFull-Text: https://hal.science/hal-00821219/documentHAL Descartes; HAL - UPEC / UPEM; HAL-Pasteur; HAL-Inserm; Hal-DiderotArticle . 2013License: CC BYAll 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_______101::aee3989396d0d9937d1db821bf67acb5&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2017 France EnglishPublisher:HAL CCSD Funded by:ANR | OUTPACEANR| OUTPACEAuthors: MOUTIN , Thierry; Doglioli , Andrea Michelangelo; DE VERNEIL , Alain; Bonnet , Sophie;MOUTIN , Thierry; Doglioli , Andrea Michelangelo; DE VERNEIL , Alain; Bonnet , Sophie;International audience; The overall goal of OUTPACE (Oligotrophy to UlTra-oligotrophy PACific Experiment) was to obtain a successful representation of the interactions between planktonic organisms and the cycle of biogenic elements in the western tropical South Pacific Ocean across trophic and N 2 fixation gradients. Within the context of climate change, it is necessary to better quantify the ability of the oligotrophic ocean to sequester carbon through biological processes. OUTPACE was organized around three main objectives, which were (1) to perform a zonal characterization of the biogeochemistry and biological diversity of the western tropical South Pacific during austral summer conditions, (2) to study the production and fate of organic matter (including carbon export) in three contrasting trophic regimes (increasing oligotrophy) with a particular emphasis on the role of dinitrogen fixation, and (3) to obtain a representation of the main biogeochemical fluxes and dynamics of the planktonic trophic network. The international OUTPACE cruise took place between 18 Febru-ary and 3 April 2015 aboard the RV L'Atalante and involved 60 scientists (30 onboard). The west-east transect covered ∼ 4000 km from the western part of the Melanesian archipelago (New Caledonia) to the western boundary of the South Pacific gyre (French Polynesia). Following an adap-tive strategy, the transect initially designed along the 19 • S parallel was adapted along-route to incorporate information coming from satellite measurements of sea surface temperature , chlorophyll a concentration, currents, and diazotroph quantification. After providing a general context and describing previous work done in this area, this introductory paper elucidates the objectives of OUTPACE, the implementation plan of the cruise and water mass and climatological characteristics and concludes with a general overview of the other papers that will be published in this special issue.
ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerMémoires en Sciences de l'Information et de la Communication; HAL AMU; HAL-IRD; Hal-DiderotArticle . 2017License: CC BYHAL Descartes; HAL-Pasteur; HAL-InsermArticle . 2017All 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______2191::11b234ee86feb82526b204f3a2c399c9&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 ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerMémoires en Sciences de l'Information et de la Communication; HAL AMU; HAL-IRD; Hal-DiderotArticle . 2017License: CC BYHAL Descartes; HAL-Pasteur; HAL-InsermArticle . 2017All 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______2191::11b234ee86feb82526b204f3a2c399c9&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 France, Sweden, France, France, Netherlands English Funded by:EC | POPFULL, NWO | A multiple constraint dat..., EC | COCOS +4 projectsEC| POPFULL ,NWO| A multiple constraint data assimilation system for the carbon cycle ,EC| COCOS ,EC| GHG EUROPE ,EC| LUISE ,EC| JULIA ,EC| DOFOCOLuyssaert, S.; Abril, G.; Andres, R.; Bastviken, D.; Bellassen, V.; Bergamaschi, P.; Bousquet, P.; Chevallier, F.; Ciais, P.; Corazza, M.; Dechow, R.; Erb, K.H.; Etiope, G.; Fortems-Cheiney, A.; Grassi, G.; Hartmann, J.; Jung, M.; Lathiere, J.; Lohila, A.; Mayorga, E.; Moosdorf, N.; Njakou, D.S.; Otto, J.; Papale, D.; Peters, W.; Peylin, P.; Raymond, P.; Rodenbeck, C.; Saarnio, S.; Schulze, E.D.; Szopa, S.; Thompson, R.; Verkerk, P.J.; Vuichard, N.; Wang, R.; Wattenbach, M.; Zaehle, S.;Globally, terrestrial ecosystems have absorbed about 30% of anthropogenic greenhouse gas emissions over the period 2000-2007 and inter-hemispheric gradients indicate that a significant fraction of terrestrial carbon sequestration must be north of the Equator. We present a compilation of the CO2, CO, CH4 and N2O balances of Europe following a dual constraint approach in which (1) a land-based balance derived mainly from ecosystem carbon inventories and (2) a land-based balance derived from flux measurements are compared to (3) the atmospheric data-based balance derived from inversions constrained by measurements of atmospheric GHG (greenhouse gas) concentrations. Good agreement between the GHG balances based on fluxes (1294 +/- 545 Tg C in CO2-eq yr(-1)), inventories (1299 +/- 200 Tg C in CO2-eq yr(-1)) and inversions (1210 +/- 405 Tg C in CO2-eq yr(-1)) increases our confidence that the processes underlying the European GHG budget are well understood and reasonably sampled. However, the uncertainty remains large and largely lacks formal estimates. Given that European net land to atmosphere exchanges are determined by a few dominant fluxes, the uncertainty of these key components needs to be formally estimated before efforts could be made to reduce the overall uncertainty. The net land-to-atmosphere flux is a net source for CO2, CO, CH4 and N2O, because the anthropogenic emissions by far exceed the biogenic sink strength. The dual-constraint approach confirmed that the European biogenic sink removes as much as 205 +/- 72 Tg C yr(-1) from fossil fuel burning from the atmosphere. However, This C is being sequestered in both terrestrial and inland aquatic ecosystems. If the C-cost for ecosystem management is taken into account, the net uptake of ecosystems is estimated to decrease by 45% but still indicates substantial C-sequestration. However, when the balance is extended from CO2 towards the main GHGs, C-uptake by terrestrial and aquatic ecosystems is offset by emissions of non-CO2 GHGs. As such, the European ecosystems are unlikely to contribute to mitigating the effects of climate change. Funding Agencies|ERC|242564263522233366|US Department of Energy, Office of Science, Biological and Environmental Research (BER) programs||Oak Ridge National Laboratory (ORNL) under US Department of Energy|DE-AC05-00OR22725|Swedish Research councils VR||FORMAS||Linkoping University||European Commission under EU|212196|German Research Foundation (DFG)|EXC117HA4472-6/1|EU-project GHG Europe|244122|EU||Geoland-2||
NARCIS; Research@WUR arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2012License: CC BYFull-Text: https://hal.science/hal-01150807v2/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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; Research@WUR arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2012License: CC BYFull-Text: https://hal.science/hal-01150807v2/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=11858/00-001M-0000-000E-DD6A-A&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2017 France, France, Netherlands EnglishPublisher:Copernicus Publications Houweling, Sander; Bergamaschi, Peter; Chevallier, Frederic; Heimann, Martin; Kaminski, Thomas; Krol, Maarten; Michalak, Anna M.; Patra, Prabir;The aim of this paper is to present an overview of inverse modeling methods that have been developed over the years for estimating the global sources and sinks of CH4. It provides insight into how techniques and estimates have evolved over time and what the remaining shortcomings are. As such, it serves a didactical purpose of introducing apprentices to the field, but it also takes stock of developments so far and reflects on promising new directions. The main focus is on methodological aspects that are particularly relevant for CH4, such as its atmospheric oxidation, the use of methane isotopologues, and specific challenges in atmospheric transport modeling of CH4. The use of satellite retrievals receives special attention as it is an active field of methodological development, with special requirements on the sampling of the model and the treatment of data uncertainty. Regional scale flux estimation and attribution is still a grand challenge, which calls for new methods capable of combining information from multiple data streams of different measured parameters. A process model representation of sources and sinks in atmospheric transport inversion schemes allows the integrated use of such data. These new developments are needed not only to improve our understanding of the main processes driving the observed global trend but also to support international efforts to reduce greenhouse gas emissions.
NARCIS; Research@WUR arrow_drop_down NARCIS; Research@WUROther literature type . Article . 2017License: CC BYFull-Text: https://edepot.wur.nl/407553add 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=11858/00-001M-0000-002A-FFBD-B&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 NARCIS; Research@WUR arrow_drop_down NARCIS; Research@WUROther literature type . Article . 2017License: CC BYFull-Text: https://edepot.wur.nl/407553add 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=11858/00-001M-0000-002A-FFBD-B&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2017 United Kingdom, France, France, Germany, Germany EnglishPublisher:Karlsruhe Funded by:EC | BACCHUS, EC | COEVOLVE, EC | LUC4C +1 projectsEC| BACCHUS ,EC| COEVOLVE ,EC| LUC4C ,EC| CRESCENDORabin, Sam S.; Melton, Joe R.; Lasslop, Gitta; Bachelet, Dominique; Forrest, Matthew; Hantson, Stijn; Kaplan, Jed O.; Li, Fang; Mangeon, Stéphane; Ward, Daniel S.; Yue, Chao; Arora, Vivek K.; Hickler, Thomas; Kloster, Silvia; Knorr, Wolfgang; Nieradzik, Lars; Spessa, Allan; Folberth, Gerd A.; Sheehan, Tim; Voulgarakis, Apostolos; Kelley, Douglas I.; Prentice, I. Colin; Sitch, Stephen; Harrison, Sandy; Arneth, Almut;International audience; The important role of fire in regulating vegetation community composition and contributions to emissions of greenhouse gases and aerosols make it a critical component of dynamic global vegetation models and Earth system models. Over 2 decades of development, a wide variety of model structures and mechanisms have been designed and incorporated into global fire models, which have been linked to different vegetation models. However, there has not yet been a systematic examination of how these different strategies contribute to model performance. Here we describe the structure of the first phase of the Fire Model Intercomparison Project (FireMIP), which for the first time seeks to systematically compare a number of models. By combining a standardized set of input data and model experiments with a rigorous comparison of model outputs to each other and to observations, we will improve the understanding of what drives vegetation fire, how it can best be simulated, and what new or improved observational data could allow better constraints on model behavior. In this paper, we introduce the fire models used in the first phase of FireMIP, the simulation protocols applied, and the benchmarking system used to evaluate the models. We have also created supplementary tables that describe, in thorough mathematical detail, the structure of each model.
Geoscientific Model ... arrow_drop_down Geoscientific Model Development; NERC Open Research ArchiveArticle . 2017 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2017Data sources: Hochschulschriftenserver - Universität Frankfurt am MainFachrepositorium LebenswissenschaftenArticle . 2017License: CC BYData sources: Fachrepositorium LebenswissenschaftenSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital RepositoryGeoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 11visibility views 11 download downloads 241 Powered bymore_vert Geoscientific Model ... arrow_drop_down Geoscientific Model Development; NERC Open Research ArchiveArticle . 2017 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2017Data sources: Hochschulschriftenserver - Universität Frankfurt am MainFachrepositorium LebenswissenschaftenArticle . 2017License: CC BYData sources: Fachrepositorium LebenswissenschaftenSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital RepositoryGeoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2011 Netherlands, Netherlands, France, Australia EnglishLi, L.; Vuichard, N.; Viovy, N.; Ciais, P.; Wang, T.; Ceschia, E.; Jans, W.; Wattenbach, M.; Beziat, P.; Gruenwald, T.; Lehuger, S.; Bernhofer, C.;handle: 10453/14676
This paper is a modelling study of crop management impacts on carbon and water fluxes at a range of European sites. The model is a crop growth model (STICS) coupled with a process-based land surface model (ORCHIDEE). The data are online eddy-covariance observations of CO2 and H2O fluxes at five European maize cultivation sites. The results show that the ORCHIDEE-STICS model explains up to 75 % of the observed daily net CO2 ecosystem exchange (NEE) variance, and up to 79 % of the latent heat flux (LE) variance at five sites. The model is better able to reproduce gross primary production (GPP) variations than terrestrial ecosystem respiration (TER) variations. We conclude that structural deficiencies in the model parameterizations of leaf area index (LAI) and TER are the main sources of error in simulating CO2 and H2O fluxes. A number of sensitivity tests, with variable crop variety, nitrogen fertilization, irrigation, and planting date, indicate that any of these management factors is able to change NEE by more than 15 %, but that the response of NEE to management parameters is highly site-dependent. Changes in management parameters are found to impact not only the daily values of NEE and LE, but also the cumulative yearly values. In addition, LE is shown to be less sensitive to management parameters than NEE. Multi-site model evaluations, coupled with sensitivity analysis to management parameters, thus provide important information about model errors, which helps to improve the simulation of CO2 and H2O fluxes across European croplands.
NARCIS; Research@WUR arrow_drop_down add 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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; Research@WUR arrow_drop_down add 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 2014 France, France, France, Netherlands English Funded by:EC | DOFOCOEC| DOFOCOLoew, A.; van Bodegom, P.; Widlowski, J.-L.; Otto, J.; Quaife, T.; Pinty, B.; Raddatz, T.;Dynamic global vegetation models (DGVMs) are an essential part of current state-of-the-art Earth system models. In recent years, the complexity of DGVMs has increased by incorporating new important processes like, e.g., nutrient cycling and land cover dynamics, while biogeophysical processes like surface radiation have not been developed much further. Canopy radiation models are however very important for the estimation of absorption and reflected fluxes and are essential for a proper estimation of surface carbon, energy and water fluxes. <br><br> The present study provides an overview of current implementations of canopy radiation schemes in a couple of state-of-the-art DGVMs and assesses their accuracy in simulating canopy absorption and reflection for a variety of different surface conditions. Systematic deviations in surface albedo and fractions of absorbed photosynthetic active radiation (faPAR) are identified and potential impacts are assessed. <br><br> The results show clear deviations for both, absorbed and reflected, surface solar radiation fluxes. FaPAR is typically underestimated, which results in an underestimation of gross primary productivity (GPP) for the investigated cases. The deviation can be as large as 25% in extreme cases. Deviations in surface albedo range between ĝ̂'0.15 ĝ‰Currency sign Δαĝ‰Currency sign 0.36, with a slight positive bias on the order of Δαĝ‰̂ 0.04. Potential radiative forcing caused by albedo deviations is estimated at ĝ̂'1.25 ĝ‰Currency sign RF ĝ‰Currency sign ĝ̂'0.8 (W mĝ̂'2), caused by neglect of the diurnal cycle of surface albedo. <br><br> The present study is the first one that provides an assessment of canopy RT schemes in different currently used DGVMs together with an assessment of the potential impact of the identified deviations. The paper illustrates that there is a general need to improve the canopy radiation schemes in DGVMs and provides different perspectives for their improvement. © Author(s) 2014. CC Attribution 3.0 License.
CORE (RIOXX-UK Aggre... arrow_drop_down add 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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert CORE (RIOXX-UK Aggre... arrow_drop_down add 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 2017 France EnglishPublisher:HAL CCSD Funded by:UKRI | Recovery of Gallium from ..., ANR | TecItEasyUKRI| Recovery of Gallium from Ionic Liquids (ReGaIL) ,ANR| TecItEasyHuon, Sylvain; Evrard, Olivier; Gourdin, Elian; Lefèvre, Irène; Bariac, Thierry; Reyss, Jean-Louis; des Tureaux, Thierry Henry; Sengtaheuanghoung, Oloth; Ayrault, Sophie; Ribolzi, Olivier;International audience; Study regionHouay Xon catchment in northern Laos.Study focusBecause agricultural headwater catchments of SE Asia are prone to erosion and deliver a significant proportion of the total suspended sediment supply to major rivers and floodplains, the potential sources of sediments and their dynamics were studied for two successive storm flow events in June 2013. Characterization of suspended sediment loads was carried out along a continuum of 7 monitoring stations, combining analyses of fallout radionuclides, particle borne organic matter and stream water properties.New hydrological insightsRadionuclide activities showed that remobilization of soil particles deposited during the previous rainy season or supplied by riverbank erosion is the dominant process, although pulses of surface-soil derived sediments also propagate downstream. This interpretation is supported by suspended organic matter data that also fingerprints the mixing of surface soil vs. subsurface particles. The study moreover highlights the advantages and the drawbacks of combining fallout radionuclides, particle borne organic matter composition and stream water characteristics to discriminate and quantify sediment sources and dynamics in rural areas undergoing urban sprawl.
Journal of Hydrology... arrow_drop_down Journal of Hydrology: Regional StudiesArticle . 2017License: CC BY NC NDData sources: BASE (Open Access Aggregator)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=od_______212::fb6a2d4a21182fdb86e370109859a1a3&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 Journal of Hydrology... arrow_drop_down Journal of Hydrology: Regional StudiesArticle . 2017License: CC BY NC NDData sources: BASE (Open Access Aggregator)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=od_______212::fb6a2d4a21182fdb86e370109859a1a3&type=result"></script>'); --> </script>
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description Publicationkeyboard_double_arrow_right Article , Other literature type 2020 Germany, United Kingdom, United Kingdom, France, Italy EnglishPublisher:HAL CCSD Funded by:NSF | Collaborative Research: ..., UKRI | EUREC4A-UK: Elucidating t..., SNSF | Large-scale circulation d... +6 projectsNSF| Collaborative Research: EUREC4A-iso--Constraining the Interplay between Clouds, Convection, and Circulation with Stable Isotopologues of Water Vapor ,UKRI| EUREC4A-UK: Elucidating the role of cloud-circulation coupling in climate ,SNSF| Large-scale circulation drivers and stable water isotope characteristics of low-level clouds over the tropical North Atlantic ,UKRI| EUREC4A-UK: Elucidating the role of cloud-circulation coupling in climate ,EC| TRIATLAS ,ANR| NEPHELAE ,EC| COMPASS ,EC| EUREC4A ,EC| CONSTRAINB. Stevens; S. Bony; D. Farrell; F. Ament; F. Ament; A. Blyth; C. Fairall; J. Karstensen; P. K. Quinn; S. Speich; C. Acquistapace; F. Aemisegger; A. L. Albright; H. Bellenger; E. Bodenschatz; K.-A. Caesar; R. Chewitt-Lucas; G. de Boer; G. de Boer; J. Delanoë; L. Denby; F. Ewald; B. Fildier; M. Forde; G. George; S. Gross; M. Hagen; A. Hausold; K. J. Heywood; L. Hirsch; M. Jacob; F. Jansen; S. Kinne; D. Klocke; T. Kölling; T. Kölling; H. Konow; M. Lothon; W. Mohr; A. K. Naumann; A. K. Naumann; L. Nuijens; L. Olivier; R. Pincus; R. Pincus; M. Pöhlker; G. Reverdin; G. Roberts; G. Roberts; S. Schnitt; H. Schulz; A. P. Siebesma; C. C. Stephan; P. Sullivan; L. Touzé-Peiffer; J. Vial; R. Vogel; P. Zuidema; N. Alexander; L. Alves; S. Arixi; H. Asmath; G. Bagheri; K. Baier; A. Bailey; D. Baranowski; A. Baron; S. Barrau; P. A. Barrett; F. Batier; A. Behrendt; A. Bendinger; F. Beucher; S. Bigorre; E. Blades; P. Blossey; O. Bock; S. Böing; P. Bosser; D. Bourras; P. Bouruet-Aubertot; K. Bower; P. Branellec; H. Branger; M. Brennek; A. Brewer; P.-E. Brilouet; B. Brügmann; S. A. Buehler; E. Burke; R. Burton; R. Calmer; J.-C. Canonici; X. Carton; G. Cato Jr.; J. A. Charles; P. Chazette; Y. Chen; M. T. Chilinski; T. Choularton; P. Chuang; S. Clarke; H. Coe; C. Cornet; P. Coutris; F. Couvreux; S. Crewell; T. Cronin; Z. Cui; Y. Cuypers; A. Daley; G. M. Damerell; T. Dauhut; H. Deneke; J.-P. Desbios; S. Dörner; S. Donner; V. Douet; K. Drushka; M. Dütsch; M. Dütsch; A. Ehrlich; K. Emanuel; A. Emmanouilidis; J.-C. Etienne; S. Etienne-Leblanc; G. Faure; G. Feingold; L. Ferrero; A. Fix; C. Flamant; P. J. Flatau; G. R. Foltz; L. Forster; I. Furtuna; A. Gadian; J. Galewsky; M. Gallagher; P. Gallimore; C. Gaston; C. Gentemann; N. Geyskens; A. Giez; J. Gollop; I. Gouirand; C. Gourbeyre; D. de Graaf; G. E. de Groot; R. Grosz; J. Güttler; M. Gutleben; K. Hall; G. Harris; K. C. Helfer; D. Henze; C. Herbert; B. Holanda; A. Ibanez-Landeta; J. Intrieri; S. Iyer; F. Julien; H. Kalesse; J. Kazil; J. Kazil; A. Kellman; A. T. Kidane; U. Kirchner; M. Klingebiel; M. Körner; L. A. Kremper; J. Kretzschmar; O. Krüger; W. Kumala; A. Kurz; P. L'Hégaret; M. Labaste; T. Lachlan-Cope; A. Laing; P. Landschützer; T. Lang; T. Lang; D. Lange; I. Lange; C. Laplace; G. Lavik; R. Laxenaire; C. Le Bihan; M. Leandro; N. Lefevre; M. Lena; D. Lenschow; Q. Li; G. Lloyd; S. Los; N. Losi; O. Lovell; C. Luneau; P. Makuch; S. Malinowski; G. Manta;The science guiding the EUREC4A campaign and its measurements is presented. EUREC4A comprised roughly 5 weeks of measurements in the downstream winter trades of the North Atlantic – eastward and southeastward of Barbados. Through its ability to characterize processes operating across a wide range of scales, EUREC4A marked a turning point in our ability to observationally study factors influencing clouds in the trades, how they will respond to warming, and their link to other components of the earth system, such as upper-ocean processes or the life cycle of particulate matter. This characterization was made possible by thousands (2500) of sondes distributed to measure circulations on meso- (200 km) and larger (500 km) scales, roughly 400 h of flight time by four heavily instrumented research aircraft; four global-class research vessels; an advanced ground-based cloud observatory; scores of autonomous observing platforms operating in the upper ocean (nearly 10 000 profiles), lower atmosphere (continuous profiling), and along the air–sea interface; a network of water stable isotopologue measurements; targeted tasking of satellite remote sensing; and modeling with a new generation of weather and climate models. In addition to providing an outline of the novel measurements and their composition into a unified and coordinated campaign, the six distinct scientific facets that EUREC4A explored – from North Brazil Current rings to turbulence-induced clustering of cloud droplets and its influence on warm-rain formation – are presented along with an overview of EUREC4A's outreach activities, environmental impact, and guidelines for scientific practice. Track data for all platforms are standardized and accessible at https://doi.org/10.25326/165 (Stevens, 2021), and a film documenting the campaign is provided as a video supplement.
HAL Clermont Univers... arrow_drop_down University of East Anglia digital repositoryArticle . 2021 . Peer-reviewedData sources: University of East Anglia digital repositoryArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerHAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-IRD; Hal-DiderotArticle . 2021 . 2020License: CC BY NCMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . Preprint . 2021add 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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert HAL Clermont Univers... arrow_drop_down University of East Anglia digital repositoryArticle . 2021 . Peer-reviewedData sources: University of East Anglia digital repositoryArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerHAL AMU; Mémoires en Sciences de l'Information et de la Communication; HAL-IRD; Hal-DiderotArticle . 2021 . 2020License: CC BY NCMémoires en Sciences de l'Information et de la Communication; Hal-DiderotArticle . Preprint . 2021add 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 2017 Belgium, France EnglishPublisher:Humanities Commons Funded by:EC | PleisTechnoVar, ANR | Big DryEC| PleisTechnoVar ,ANR| Big DryAuthors: Leplongeon, Alice;Leplongeon, Alice;During the Nubia Salvage Campaign and the subsequent expeditions from the 1960's to the 1980's, numerous sites attributed to the Late Palaeolithic (~25-15 ka) were found in the Nile Valley, particularly in Nubia and Upper Egypt. This region is one of the few to have allowed human occupations during the dry Marine Isotope Stage 2 and is therefore key to understanding how human populations adapted to environmental changes at this time. This paper focuses on two sites located in Upper Egypt, excavated by the Combined Prehistoric Expedition: E71K18, attributed to the Afian industry and E71K20, attributed to the Silsilian industry. It aims to review the geomorphological and chronological evidence of the sites, present a technological analysis of the lithic assemblages in order to provide data that can be used in detailed comparative studies, which will allow discussion of technological variability in the Late Palaeolithic of the Nile Valley and its place within the regional context. The lithic analysis relies on the chaîne opératoire concept combined with an attribute analysis to allow quantification. This study (1) casts doubts on the chronology of E71K18 and related Afian industry, which could be older or younger than previously suggested, highlights (2) distinct technological characteristics for the Afian and the Silsilian, as well as (3) similar technological characteristics which allow to group them under a same broad techno-cultural complex, distinct from those north or south of the area. ispartof: PLOS ONE vol:12 issue:12 ispartof: location:United States status: published
Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2017Full-Text: http://europepmc.org/articles/PMC5744920Data sources: PubMed Centraladd 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 gold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2017Full-Text: http://europepmc.org/articles/PMC5744920Data sources: PubMed Centraladd 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 2013 United Kingdom, Netherlands, France EnglishPublisher:Copernicus Publications Zuiderweg, A.; Holzinger, R.; Martinerie, Patricia; Schneider, R.; Kaiser, J.; Witrant, Emmanuel; Etheridge, D.; Petrenko, V.; Blunier, T.; Röckmann, T.;A series of 12 high volume air samples collected from the S2 firn core during the North Greenland Eemian Ice Drilling (NEEM) 2009 campaign have been measured for mixing ratio and stable carbon isotope composition of the chlorofluorocarbon CFC-12 (CCl2F2). While the mixing ratio measurements compare favorably to other firn air studies, the isotope results show extreme 13C depletion at the deepest measurable depth (65 m), to values lower than δ13C = −80‰ vs. VPDB (the international stable carbon isotope scale), compared to present day surface tropospheric measurements near −40‰. Firn air modeling was used to interpret these measurements. Reconstructed atmospheric time series indicate even larger depletions (to −120‰) near 1950 AD, with subsequent rapid enrichment of the atmospheric reservoir of the compound to the present day value. Mass-balance calculations show that this change is likely to have been caused by a large change in the isotopic composition of anthropogenic CFC-12 emissions, probably due to technological advances in the CFC production process over the last 80 yr, though direct evidence is lacking.
University of East A... arrow_drop_down University of East Anglia digital repositoryArticle . 2013 . Peer-reviewedData sources: University of East Anglia digital repositoryMémoires en Sciences de l'Information et de la CommunicationArticle . 2013License: CC BYFull-Text: https://hal.science/hal-00821219/documentHAL Descartes; HAL - UPEC / UPEM; HAL-Pasteur; HAL-Inserm; Hal-DiderotArticle . 2013License: CC BYAll 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_______101::aee3989396d0d9937d1db821bf67acb5&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 University of East A... arrow_drop_down University of East Anglia digital repositoryArticle . 2013 . Peer-reviewedData sources: University of East Anglia digital repositoryMémoires en Sciences de l'Information et de la CommunicationArticle . 2013License: CC BYFull-Text: https://hal.science/hal-00821219/documentHAL Descartes; HAL - UPEC / UPEM; HAL-Pasteur; HAL-Inserm; Hal-DiderotArticle . 2013License: CC BYAll 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_______101::aee3989396d0d9937d1db821bf67acb5&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2017 France EnglishPublisher:HAL CCSD Funded by:ANR | OUTPACEANR| OUTPACEAuthors: MOUTIN , Thierry; Doglioli , Andrea Michelangelo; DE VERNEIL , Alain; Bonnet , Sophie;MOUTIN , Thierry; Doglioli , Andrea Michelangelo; DE VERNEIL , Alain; Bonnet , Sophie;International audience; The overall goal of OUTPACE (Oligotrophy to UlTra-oligotrophy PACific Experiment) was to obtain a successful representation of the interactions between planktonic organisms and the cycle of biogenic elements in the western tropical South Pacific Ocean across trophic and N 2 fixation gradients. Within the context of climate change, it is necessary to better quantify the ability of the oligotrophic ocean to sequester carbon through biological processes. OUTPACE was organized around three main objectives, which were (1) to perform a zonal characterization of the biogeochemistry and biological diversity of the western tropical South Pacific during austral summer conditions, (2) to study the production and fate of organic matter (including carbon export) in three contrasting trophic regimes (increasing oligotrophy) with a particular emphasis on the role of dinitrogen fixation, and (3) to obtain a representation of the main biogeochemical fluxes and dynamics of the planktonic trophic network. The international OUTPACE cruise took place between 18 Febru-ary and 3 April 2015 aboard the RV L'Atalante and involved 60 scientists (30 onboard). The west-east transect covered ∼ 4000 km from the western part of the Melanesian archipelago (New Caledonia) to the western boundary of the South Pacific gyre (French Polynesia). Following an adap-tive strategy, the transect initially designed along the 19 • S parallel was adapted along-route to incorporate information coming from satellite measurements of sea surface temperature , chlorophyll a concentration, currents, and diazotroph quantification. After providing a general context and describing previous work done in this area, this introductory paper elucidates the objectives of OUTPACE, the implementation plan of the cruise and water mass and climatological characteristics and concludes with a general overview of the other papers that will be published in this special issue.
ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerMémoires en Sciences de l'Information et de la Communication; HAL AMU; HAL-IRD; Hal-DiderotArticle . 2017License: CC BYHAL Descartes; HAL-Pasteur; HAL-InsermArticle . 2017All 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______2191::11b234ee86feb82526b204f3a2c399c9&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 ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerMémoires en Sciences de l'Information et de la Communication; HAL AMU; HAL-IRD; Hal-DiderotArticle . 2017License: CC BYHAL Descartes; HAL-Pasteur; HAL-InsermArticle . 2017All 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______2191::11b234ee86feb82526b204f3a2c399c9&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 France, Sweden, France, France, Netherlands English Funded by:EC | POPFULL, NWO | A multiple constraint dat..., EC | COCOS +4 projectsEC| POPFULL ,NWO| A multiple constraint data assimilation system for the carbon cycle ,EC| COCOS ,EC| GHG EUROPE ,EC| LUISE ,EC| JULIA ,EC| DOFOCOLuyssaert, S.; Abril, G.; Andres, R.; Bastviken, D.; Bellassen, V.; Bergamaschi, P.; Bousquet, P.; Chevallier, F.; Ciais, P.; Corazza, M.; Dechow, R.; Erb, K.H.; Etiope, G.; Fortems-Cheiney, A.; Grassi, G.; Hartmann, J.; Jung, M.; Lathiere, J.; Lohila, A.; Mayorga, E.; Moosdorf, N.; Njakou, D.S.; Otto, J.; Papale, D.; Peters, W.; Peylin, P.; Raymond, P.; Rodenbeck, C.; Saarnio, S.; Schulze, E.D.; Szopa, S.; Thompson, R.; Verkerk, P.J.; Vuichard, N.; Wang, R.; Wattenbach, M.; Zaehle, S.;Globally, terrestrial ecosystems have absorbed about 30% of anthropogenic greenhouse gas emissions over the period 2000-2007 and inter-hemispheric gradients indicate that a significant fraction of terrestrial carbon sequestration must be north of the Equator. We present a compilation of the CO2, CO, CH4 and N2O balances of Europe following a dual constraint approach in which (1) a land-based balance derived mainly from ecosystem carbon inventories and (2) a land-based balance derived from flux measurements are compared to (3) the atmospheric data-based balance derived from inversions constrained by measurements of atmospheric GHG (greenhouse gas) concentrations. Good agreement between the GHG balances based on fluxes (1294 +/- 545 Tg C in CO2-eq yr(-1)), inventories (1299 +/- 200 Tg C in CO2-eq yr(-1)) and inversions (1210 +/- 405 Tg C in CO2-eq yr(-1)) increases our confidence that the processes underlying the European GHG budget are well understood and reasonably sampled. However, the uncertainty remains large and largely lacks formal estimates. Given that European net land to atmosphere exchanges are determined by a few dominant fluxes, the uncertainty of these key components needs to be formally estimated before efforts could be made to reduce the overall uncertainty. The net land-to-atmosphere flux is a net source for CO2, CO, CH4 and N2O, because the anthropogenic emissions by far exceed the biogenic sink strength. The dual-constraint approach confirmed that the European biogenic sink removes as much as 205 +/- 72 Tg C yr(-1) from fossil fuel burning from the atmosphere. However, This C is being sequestered in both terrestrial and inland aquatic ecosystems. If the C-cost for ecosystem management is taken into account, the net uptake of ecosystems is estimated to decrease by 45% but still indicates substantial C-sequestration. However, when the balance is extended from CO2 towards the main GHGs, C-uptake by terrestrial and aquatic ecosystems is offset by emissions of non-CO2 GHGs. As such, the European ecosystems are unlikely to contribute to mitigating the effects of climate change. Funding Agencies|ERC|242564263522233366|US Department of Energy, Office of Science, Biological and Environmental Research (BER) programs||Oak Ridge National Laboratory (ORNL) under US Department of Energy|DE-AC05-00OR22725|Swedish Research councils VR||FORMAS||Linkoping University||European Commission under EU|212196|German Research Foundation (DFG)|EXC117HA4472-6/1|EU-project GHG Europe|244122|EU||Geoland-2||
NARCIS; Research@WUR arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2012License: CC BYFull-Text: https://hal.science/hal-01150807v2/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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; Research@WUR arrow_drop_down HAL Descartes; Mémoires en Sciences de l'Information et de la Communication; HAL-CEAArticle . 2012License: CC BYFull-Text: https://hal.science/hal-01150807v2/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 2017 France, France, Netherlands EnglishPublisher:Copernicus Publications Houweling, Sander; Bergamaschi, Peter; Chevallier, Frederic; Heimann, Martin; Kaminski, Thomas; Krol, Maarten; Michalak, Anna M.; Patra, Prabir;The aim of this paper is to present an overview of inverse modeling methods that have been developed over the years for estimating the global sources and sinks of CH4. It provides insight into how techniques and estimates have evolved over time and what the remaining shortcomings are. As such, it serves a didactical purpose of introducing apprentices to the field, but it also takes stock of developments so far and reflects on promising new directions. The main focus is on methodological aspects that are particularly relevant for CH4, such as its atmospheric oxidation, the use of methane isotopologues, and specific challenges in atmospheric transport modeling of CH4. The use of satellite retrievals receives special attention as it is an active field of methodological development, with special requirements on the sampling of the model and the treatment of data uncertainty. Regional scale flux estimation and attribution is still a grand challenge, which calls for new methods capable of combining information from multiple data streams of different measured parameters. A process model representation of sources and sinks in atmospheric transport inversion schemes allows the integrated use of such data. These new developments are needed not only to improve our understanding of the main processes driving the observed global trend but also to support international efforts to reduce greenhouse gas emissions.
NARCIS; Research@WUR arrow_drop_down NARCIS; Research@WUROther literature type . Article . 2017License: CC BYFull-Text: https://edepot.wur.nl/407553add 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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; Research@WUR arrow_drop_down NARCIS; Research@WUROther literature type . Article . 2017License: CC BYFull-Text: https://edepot.wur.nl/407553add 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 2017 United Kingdom, France, France, Germany, Germany EnglishPublisher:Karlsruhe Funded by:EC | BACCHUS, EC | COEVOLVE, EC | LUC4C +1 projectsEC| BACCHUS ,EC| COEVOLVE ,EC| LUC4C ,EC| CRESCENDORabin, Sam S.; Melton, Joe R.; Lasslop, Gitta; Bachelet, Dominique; Forrest, Matthew; Hantson, Stijn; Kaplan, Jed O.; Li, Fang; Mangeon, Stéphane; Ward, Daniel S.; Yue, Chao; Arora, Vivek K.; Hickler, Thomas; Kloster, Silvia; Knorr, Wolfgang; Nieradzik, Lars; Spessa, Allan; Folberth, Gerd A.; Sheehan, Tim; Voulgarakis, Apostolos; Kelley, Douglas I.; Prentice, I. Colin; Sitch, Stephen; Harrison, Sandy; Arneth, Almut;International audience; The important role of fire in regulating vegetation community composition and contributions to emissions of greenhouse gases and aerosols make it a critical component of dynamic global vegetation models and Earth system models. Over 2 decades of development, a wide variety of model structures and mechanisms have been designed and incorporated into global fire models, which have been linked to different vegetation models. However, there has not yet been a systematic examination of how these different strategies contribute to model performance. Here we describe the structure of the first phase of the Fire Model Intercomparison Project (FireMIP), which for the first time seeks to systematically compare a number of models. By combining a standardized set of input data and model experiments with a rigorous comparison of model outputs to each other and to observations, we will improve the understanding of what drives vegetation fire, how it can best be simulated, and what new or improved observational data could allow better constraints on model behavior. In this paper, we introduce the fire models used in the first phase of FireMIP, the simulation protocols applied, and the benchmarking system used to evaluate the models. We have also created supplementary tables that describe, in thorough mathematical detail, the structure of each model.
Geoscientific Model ... arrow_drop_down Geoscientific Model Development; NERC Open Research ArchiveArticle . 2017 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2017Data sources: Hochschulschriftenserver - Universität Frankfurt am MainFachrepositorium LebenswissenschaftenArticle . 2017License: CC BYData sources: Fachrepositorium LebenswissenschaftenSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital RepositoryGeoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 11visibility views 11 download downloads 241 Powered bymore_vert Geoscientific Model ... arrow_drop_down Geoscientific Model Development; NERC Open Research ArchiveArticle . 2017 . Peer-reviewedLicense: CC BYHochschulschriftenserver - Universität Frankfurt am MainArticle . 2017Data sources: Hochschulschriftenserver - Universität Frankfurt am MainFachrepositorium LebenswissenschaftenArticle . 2017License: CC BYData sources: Fachrepositorium LebenswissenschaftenSpiral - Imperial College Digital RepositoryArticle . 2017Data sources: Spiral - Imperial College Digital RepositoryGeoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus Publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5445/ir/1000069022&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2011 Netherlands, Netherlands, France, Australia EnglishLi, L.; Vuichard, N.; Viovy, N.; Ciais, P.; Wang, T.; Ceschia, E.; Jans, W.; Wattenbach, M.; Beziat, P.; Gruenwald, T.; Lehuger, S.; Bernhofer, C.;handle: 10453/14676
This paper is a modelling study of crop management impacts on carbon and water fluxes at a range of European sites. The model is a crop growth model (STICS) coupled with a process-based land surface model (ORCHIDEE). The data are online eddy-covariance observations of CO2 and H2O fluxes at five European maize cultivation sites. The results show that the ORCHIDEE-STICS model explains up to 75 % of the observed daily net CO2 ecosystem exchange (NEE) variance, and up to 79 % of the latent heat flux (LE) variance at five sites. The model is better able to reproduce gross primary production (GPP) variations than terrestrial ecosystem respiration (TER) variations. We conclude that structural deficiencies in the model parameterizations of leaf area index (LAI) and TER are the main sources of error in simulating CO2 and H2O fluxes. A number of sensitivity tests, with variable crop variety, nitrogen fertilization, irrigation, and planting date, indicate that any of these management factors is able to change NEE by more than 15 %, but that the response of NEE to management parameters is highly site-dependent. Changes in management parameters are found to impact not only the daily values of NEE and LE, but also the cumulative yearly values. In addition, LE is shown to be less sensitive to management parameters than NEE. Multi-site model evaluations, coupled with sensitivity analysis to management parameters, thus provide important information about model errors, which helps to improve the simulation of CO2 and H2O fluxes across European croplands.
NARCIS; Research@WUR arrow_drop_down add 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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert NARCIS; Research@WUR arrow_drop_down 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.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2014 France, France, France, Netherlands English Funded by:EC | DOFOCOEC| DOFOCOLoew, A.; van Bodegom, P.; Widlowski, J.-L.; Otto, J.; Quaife, T.; Pinty, B.; Raddatz, T.;Dynamic global vegetation models (DGVMs) are an essential part of current state-of-the-art Earth system models. In recent years, the complexity of DGVMs has increased by incorporating new important processes like, e.g., nutrient cycling and land cover dynamics, while biogeophysical processes like surface radiation have not been developed much further. Canopy radiation models are however very important for the estimation of absorption and reflected fluxes and are essential for a proper estimation of surface carbon, energy and water fluxes. <br><br> The present study provides an overview of current implementations of canopy radiation schemes in a couple of state-of-the-art DGVMs and assesses their accuracy in simulating canopy absorption and reflection for a variety of different surface conditions. Systematic deviations in surface albedo and fractions of absorbed photosynthetic active radiation (faPAR) are identified and potential impacts are assessed. <br><br> The results show clear deviations for both, absorbed and reflected, surface solar radiation fluxes. FaPAR is typically underestimated, which results in an underestimation of gross primary productivity (GPP) for the investigated cases. The deviation can be as large as 25% in extreme cases. Deviations in surface albedo range between ĝ̂'0.15 ĝ‰Currency sign Δαĝ‰Currency sign 0.36, with a slight positive bias on the order of Δαĝ‰̂ 0.04. Potential radiative forcing caused by albedo deviations is estimated at ĝ̂'1.25 ĝ‰Currency sign RF ĝ‰Currency sign ĝ̂'0.8 (W mĝ̂'2), caused by neglect of the diurnal cycle of surface albedo. <br><br> The present study is the first one that provides an assessment of canopy RT schemes in different currently used DGVMs together with an assessment of the potential impact of the identified deviations. The paper illustrates that there is a general need to improve the canopy radiation schemes in DGVMs and provides different perspectives for their improvement. © Author(s) 2014. CC Attribution 3.0 License.
CORE (RIOXX-UK Aggre... arrow_drop_down add 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.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert CORE (RIOXX-UK Aggre... arrow_drop_down add 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 2017 France EnglishPublisher:HAL CCSD Funded by:UKRI | Recovery of Gallium from ..., ANR | TecItEasyUKRI| Recovery of Gallium from Ionic Liquids (ReGaIL) ,ANR| TecItEasyHuon, Sylvain; Evrard, Olivier; Gourdin, Elian; Lefèvre, Irène; Bariac, Thierry; Reyss, Jean-Louis; des Tureaux, Thierry Henry; Sengtaheuanghoung, Oloth; Ayrault, Sophie; Ribolzi, Olivier;International audience; Study regionHouay Xon catchment in northern Laos.Study focusBecause agricultural headwater catchments of SE Asia are prone to erosion and deliver a significant proportion of the total suspended sediment supply to major rivers and floodplains, the potential sources of sediments and their dynamics were studied for two successive storm flow events in June 2013. Characterization of suspended sediment loads was carried out along a continuum of 7 monitoring stations, combining analyses of fallout radionuclides, particle borne organic matter and stream water properties.New hydrological insightsRadionuclide activities showed that remobilization of soil particles deposited during the previous rainy season or supplied by riverbank erosion is the dominant process, although pulses of surface-soil derived sediments also propagate downstream. This interpretation is supported by suspended organic matter data that also fingerprints the mixing of surface soil vs. subsurface particles. The study moreover highlights the advantages and the drawbacks of combining fallout radionuclides, particle borne organic matter composition and stream water characteristics to discriminate and quantify sediment sources and dynamics in rural areas undergoing urban sprawl.
Journal of Hydrology... arrow_drop_down Journal of Hydrology: Regional StudiesArticle . 2017License: CC BY NC NDData sources: BASE (Open Access Aggregator)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=od_______212::fb6a2d4a21182fdb86e370109859a1a3&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 Journal of Hydrology... arrow_drop_down Journal of Hydrology: Regional StudiesArticle . 2017License: CC BY NC NDData sources: BASE (Open Access Aggregator)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=od_______212::fb6a2d4a21182fdb86e370109859a1a3&type=result"></script>'); --> </script>
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