المؤلفون: Yang, Chunxue, Bourdallé-Badie, Romain, Drevillon, Marie, Amaya, Dillon, Aouf, Lotfi, Aydogdu, Ali, Barton, Benjamin, Bell, Mike, Boyer, Tim, Blauw, Anouk, Carton, James, Candela, Tony, Cossarini, Gianpiero, Dabrowski, Tomasz, de Boisseson, Eric, de Mora, Lee, Fablet, Ronan, Forget, Gaël, Fujii, Yosuke, Garric, Gilles, Giunta, Valentina, Salamon, Peter, Hersbach, Hans, Juza, Mélanie, Sommer, Julien Le, Martin, Matthew, Mcadam, Ronan, Garcia, Melisa Menendez, Morim, Joao, Nicolì, Dario, Reppucci, Antonio, Samuelsen, Annette, Sauzède, Raphaëlle, Slivinski, Laura, Specq, Damien, Storto, Andrea, Tuomi, Laura, Vandenbulcke, Luc, Aznar, Roland, Beuvier, Jonathan, Cipollone, Andrea, Clementi, Emanuela, Di Biagio, Valeria, Escudier, Romain, Giesen, Rianne, Greiner, Eric, Guihou, Karen, Korabel, Vasily, Lamouroux, Julien, Chune, Stephane Law, Lellouche, Jean- Michel, Levier, Bruno, Lima, Leonardo, Mangin, Antoine, Mayer, Michael, Melet, Angelique, Miraglio, Pietro, Oikonomou, Charikleia, Pfeffer, Julia, Renshaw, Richard, Ringgaard, Ida, Thual, Sulian, Titaud, Olivier, Tonani, Marina, van Gennip, Simon, von Schuckmann, Karina, Drillet, Yann, Traon, Pierre-Yves Le

المساهمون: National Research Council of Italy, Mercator Océan, Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Service hydrographique et océanographique de la Marine-Centre National de la Recherche Scientifique (CNRS)-Météo-France, NOAA Physical Sciences Laboratory (PSL), National Oceanic and Atmospheric Administration (NOAA), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS), Euro-Mediterranean Center on Climate Change (CMCC), National Oceanographic Centre Liverpool (NOC ), Met Office Hadley Centre (MOHC), United Kingdom Met Office Exeter, Deltares The Netherlands, University of Maryland College Park, University of Maryland System, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Marine Institute Ireland, European Centre for Medium-Range Weather Forecasts (ECMWF), Plymouth Marine Laboratory (PML), Département Mathematical and Electrical Engineering (IMT Atlantique - MEE), IMT Atlantique (IMT Atlantique), Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT), Equipe Observations Signal & Environnement (Lab-STICC_OSE), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom Paris (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom Paris (IMT), Océan Dynamique Observations Analyse (ODYSSEY), Université de Rennes (UR)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-IMT Atlantique (IMT Atlantique), Massachusetts Institute of Technology (MIT), Meteorological Research Institute Tsukuba (MRI), Japan Meteorological Agency (JMA), European Commission - Joint Research Centre Ispra (JRC), SOCIB Balearic Islands Coastal Ocean Observing and Forecasting System, Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Centro Euro-Mediterraneo per i Cambiamenti Climatici Bologna (CMCC), Universidad de Cantabria Santander = University of Cantabria Spain = Université de Cantabrie Espagne (UC / UniCan), University of Central Florida Orlando (UCF), Nansen Environmental and Remote Sensing Center Bergen (NERSC), Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NOAA Earth System Research Laboratory (ESRL), Finnish Meteorological Institute (FMI), Université de Liège, Nologin Oceanic Weather Systems Madrid (NOW), Royal Netherlands Meteorological Institute (KNMI), Collecte Localisation Satellites (CLS), Danish Meteorological Institute (DMI), Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST), Universität Wien = University of Vienna, Hellenic Centre for Marine Research (HCMR), Magellium, Met Office Climate Research Division

المصدر: ISSN: 0003-0007.

مصطلحات موضوعية: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere

الوصف: International audience

العلاقة: hal-04536448; https://hal.science/hal-04536448Test; https://hal.science/hal-04536448/documentTest; https://hal.science/hal-04536448/file/bams-BAMS-D-24-0034.1.pdfTest

الإتاحة: https://doi.org/10.1175/BAMS-D-24-0034.1Test
https://hal.science/hal-04536448Test
https://hal.science/hal-04536448/documentTest
https://hal.science/hal-04536448/file/bams-BAMS-D-24-0034.1.pdfTest

المؤلفون: Clavier, Cannelle, Meftah, Mustapha, Sarkissian, Alain, Romand, Frédéric, Fanton d'Andon, Odile, Hembise, Mangin, Antoine, Bekki, Slimane, Dahoo, Pierre-Richard, Galopeau, Patrick H. M., Lefèvre, Franck, Hauchecorne, Alain, Keckhut, Philippe

المساهمون: STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST), HELIOS - LATMOS

المصدر: ISSN: 2072-4292 ; Remote Sensing ; https://insu.hal.science/insu-04550544Test ; Remote Sensing, 2024, 16 (3), pp.529. ⟨10.3390/rs16030529⟩.

مصطلحات موضوعية: greenhouse gases, carbon dioxide, methane, earth observation, Uvsq-Sat NG, SolAtmos, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology

الوصف: International audience ; Monitoring atmospheric concentrations of greenhouse gases (GHGs) like carbon diox- ide and methane in near real time and with good spatial resolution is crucial for enhancing our understanding of the sources and sinks of these gases. A novel approach can be proposed using a con- stellation of small satellites equipped with miniaturized spectrometers having a spectral resolution of a few nanometers. The objective of this study is to describe expected results that can be obtained with a single satellite named Uvsq-Sat NG. The SolAtmos end-to-end simulator and its three tools (IRIS, OptiSpectra, and GHGRetrieval) were developed to evaluate the performance of the spectrometer of the Uvsq-Sat NG mission, which focuses on measuring the main GHGs. The IRIS tool was imple- mented to provide Top-Of-Atmosphere (TOA) spectral radiances. Four scenes were analyzed (pine forest, deciduous forest, ocean, snow) combined with different aerosol types (continental, desert, maritime, urban). Simulated radiance spectra were calculated based on the wavelength ranges of the Uvsq-Sat NG, which spans from 1200 to 2000 nm. The OptiSpectra tool was used to determine optimal observational settings for the spectrometer, including Signal-to-Noise Ratio (SNR) and integration time. Data derived from IRIS and OptiSpectra served as input for our GHGRetrieval simulation tool, developed to provide greenhouse gas concentrations. The Levenberg–Marquardt algorithm was applied iteratively to ne-tune gas concentrations and model inputs, aligning observed transmittance functions with simulated ones under given environmental conditions. To estimate gas concentrations (CO2 , CH4 , O2 , H2 O) and their uncertainties, the Monte Carlo method was used. Based on this analysis, this study demonstrates that a miniaturized spectrometer onboard Uvsq-Sat NG is capable of observing different scenes by adjusting its integration time according to the wavelength. The expected precision for each measurement is of the order of a few ppm for ...

العلاقة: insu-04550544; https://insu.hal.science/insu-04550544Test; https://insu.hal.science/insu-04550544v2/documentTest; https://insu.hal.science/insu-04550544v2/file/remotesensing-16-00529.pdfTest

الإتاحة: https://doi.org/10.3390/rs16030529Test
https://insu.hal.science/insu-04550544Test
https://insu.hal.science/insu-04550544v2/documentTest
https://insu.hal.science/insu-04550544v2/file/remotesensing-16-00529.pdfTest

المؤلفون: Meftah, Mustapha, Clavier, Cannelle, Sarkissian, Alain, Hauchecorne, Alain, Bekki, Slimane, Lefèvre, Franck, Galopeau, Patrick H. M., Dahoo, Pierre-Richard, Pazmino, Andrea, Vieau, André-Jean, Dufour, Christophe, Maso, Pierre, Caignard, Nicolas, Ferreira, Frédéric, Gilbert, Pierre, D’andon, Odile, Hembise Fanton, Mathieu, Sandrine, Mangin, Antoine, Billard, Catherine, Keckhut, Philippe

المساهمون: STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

المصدر: ISSN: 2072-4292 ; Remote Sensing ; https://insu.hal.science/insu-04233745Test ; Remote Sensing, 2023, 15 (19), pp.4876. ⟨10.3390/rs15194876⟩.

مصطلحات موضوعية: greenhouse gases, Earth's Radiation Budget, spectrometer, radiometer, imaging systems, [SDU]Sciences of the Universe [physics]

الوصف: International audience ; Climate change is undeniably one of the most pressing and critical challenges facing humanity in the 21st century. In this context, monitoring the Earth’s Energy Imbalance (EEI) is fundamental in conjunction with greenhouse gases (GHGs) in order to comprehensively understand and address climate change. The French Uvsq-Sat NG pathfinder mission addresses this issue through the implementation of a Six-Unit CubeSat, which has dimensions of 111.3 × 36.6 × 38.8 cm in its unstowed configuration. Uvsq-Sat NG is a satellite mission spearheaded by the Laboratoire Atmosphères, Observations Spatiales (LATMOS), and supported by the International Satellite Program in Research and Education (INSPIRE). The launch of this mission is planned for 2025. One of the Uvsq-Sat NG objectives is to ensure the smooth continuity of the Earth Radiation Budget (ERB) initiated via the Uvsq-Sat and Inspire-Sat satellites. Uvsq-Sat NG seeks to achieve broadband ERB measurements using state-of-the-art yet straightforward technologies. Another goal of the Uvsq-Sat NG mission is to conduct precise and comprehensive monitoring of atmospheric gas concentrations (CO2 and CH4) on a global scale and to investigate its correlation with Earth’s Outgoing Longwave Radiation (OLR). Uvsq-Sat NG carries several payloads, including Earth Radiative Sensors (ERSs) for monitoring incoming solar radiation and outgoing terrestrial radiation. A Near-Infrared (NIR) Spectrometer is onboard to assess GHGs’ atmospheric concentrations through observations in the wavelength range of 1200 to 2000 nm. Uvsq-Sat NG also includes a high-definition camera (NanoCam) designed to capture images of the Earth in the visible range. The NanoCam will facilitate data post-processing acquired via the spectrometer by ensuring accurate geolocation of the observed scenes. It will also offer the capability of observing the Earth’s limb, thus providing the opportunity to roughly estimate the vertical temperature profile of the atmosphere. We present here the ...

العلاقة: insu-04233745; https://insu.hal.science/insu-04233745Test; https://insu.hal.science/insu-04233745/documentTest; https://insu.hal.science/insu-04233745/file/remotesensing-15-04876-v2.pdfTest

الإتاحة: https://doi.org/10.3390/rs15194876Test
https://insu.hal.science/insu-04233745Test
https://insu.hal.science/insu-04233745/documentTest
https://insu.hal.science/insu-04233745/file/remotesensing-15-04876-v2.pdfTest

المؤلفون: Loisel, Hubert, Kien, Trung, Ferreira, Daniel, Schaffer, Steinmetz, François, Mangin, Antoine, Bretagnon, Marine, Fanton d'Andon, Odile, Hembise, Duforêt-Gaurier, Lucile

المساهمون: Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG), Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ), Université du Littoral Côte d'Opale (ULCO)

المصدر: ISSN: 2752-0706 ; State of the Planet ; https://hal.science/hal-04348896Test ; State of the Planet , 2023, 7th edition of the Copernicus Ocean State Report (OSR7), 1-osr7 (11), ⟨10.5194/sp-1-osr7-11-2023⟩.

مصطلحات موضوعية: [SDE]Environmental Sciences

الوصف: International audience ; Knowledge of the organic and inorganic particulate fraction of suspended material in coastal waters is essential for the study of particle dynamics and biogeochemical cycles in these complex and highly variable environments. Thanks to the availability of appropriate spatial sensors and to the considerable improvements in algorithms dedicated to the satellite observation of coastal waters from ocean color radiometry (OCR) achieved in the last 2 decades, various optical and biogeochemical parameters can now be routinely monitored over coastal waters. Here we show that a proxy for particulate composition (PPC) can be estimated from OCR observations. The present algorithm, based on a neural network approach, has been validated using a broad range of biogeochemical data collected in various contrasted coastal waters and has been applied to MERIS observations over the global coastal ocean at a 1 km × 1 km spatial resolution from 2002 to 2012. The relevance of the temporal occurrence of PPC in a given water pixel has been illustrated over the global coastal ocean, and its pertinence has been discussed in depth for the English Channel and the southern North Sea, which are characterized by a well-documented variability in suspended particulate matter composition. The present algorithm can directly be applied to all OCR sensors.

العلاقة: hal-04348896; https://hal.science/hal-04348896Test; https://hal.science/hal-04348896/documentTest; https://hal.science/hal-04348896/file/LOSEILetal_sp-1-osr7-11-2023.pdfTest

الإتاحة: https://doi.org/10.5194/sp-1-osr7-11-2023Test
https://hal.science/hal-04348896Test
https://hal.science/hal-04348896/documentTest
https://hal.science/hal-04348896/file/LOSEILetal_sp-1-osr7-11-2023.pdfTest

المؤلفون: Terrats, Louis, Claustre, Hervé, Briggs, Nathan, Poteau, Antoine, Briat, Benjamin, Lacour, Léo, Ricour, Florian, Mangin, Antoine, Neukermans, Griet

المصدر: GLOBAL BIOGEOCHEMICAL CYCLES ; ISSN: 0886-6236 ; ISSN: 1944-9224

مصطلحات موضوعية: Earth and Environmental Sciences, Biology and Life Sciences, ocean carbon cycle, biological carbon pump, BioGeoChemical-Argo floats, bio-optics, carbon flux, sinking particles, POC flux, phytoplankton, BGC-Argo floats, mesopelagic layer, PARTICULATE ORGANIC-CARBON, HIGH-RESOLUTION OBSERVATIONS, IRON-FERTILIZED AREA, POLAR FRONTAL ZONES, SEA-ICE ZONE, IN-SITU, BEAM ATTENUATION, SINKING VELOCITY, FECAL PELLETS, PARTICLE-SIZE

الوصف: The gravitational sinking of particles in the mesopelagic layer (similar to 200-1,000 m) transfers to the deep ocean a part of atmospheric carbon fixed by phytoplankton. This process, called the gravitational pump, exerts an important control on atmospheric CO2 levels but remains poorly characterized given the limited spatio-temporal coverage of ship-based flux measurements. Here, we examined the gravitational pump with BioGeoChemical-Argo floats in the Southern Ocean, a critically under-sampled area. Using time-series of bio-optical measurements, we characterized the concentration of particles in the productive zone, their export and transfer efficiency in the underlying mesopelagic zone, and the magnitude of sinking flux at 1,000 m. We separated float observations into six environments delineated by latitudinal fronts, sea-ice coverage, and natural iron fertilization. Results show a significant increase in the sinking-particle flux at 1,000 m with increasing latitude, despite comparable particle concentrations in the productive layer. The variability in deep flux was driven by changes in the transfer efficiency of the flux, related to the composition of the phytoplanktonic community and the size of particles, with intense flux associated with the predominance of micro-phytoplankton and large particles at the surface. We quantified the relationships between the nature of surface particles and the flux at 1,000 m and used these results to upscale our flux survey across the whole Southern Ocean using surface observations by floats and satellites. We then estimated the basin-wide Spring-Summer flux of sinking particles at 1,000 m over the Southern Ocean (0.054 +/- 0.021 Pg C).

وصف الملف: application/pdf

العلاقة: https://biblio.ugent.be/publication/01HE0477TAB2FWPHMBBK3WV2YYTest; http://hdl.handle.net/1854/LU-01HE0477TAB2FWPHMBBK3WV2YYTest; http://doi.org/10.1029/2022gb007624Test; https://biblio.ugent.be/publication/01HE0477TAB2FWPHMBBK3WV2YY/file/01HE04DHM1C5ATAK4CYXA1MS67Test

الإتاحة: https://doi.org/10.1029/2022gb007624Test
https://biblio.ugent.be/publication/01HE0477TAB2FWPHMBBK3WV2YYTest
http://hdl.handle.net/1854/LU-01HE0477TAB2FWPHMBBK3WV2YYTest
https://biblio.ugent.be/publication/01HE0477TAB2FWPHMBBK3WV2YY/file/01HE04DHM1C5ATAK4CYXA1MS67Test

المؤلفون: Xi, Hongyan, Bretagnon, Marine, Losa, Svetlana N., Brotas, Vanda, Gomes, Mara, Peeken, Ilka, Alvarado, Leonardo M. A., Mangin, Antoine, Bracher, Astrid

المصدر: eISSN: 2752-0706

الوصف: An analysis of multi-satellite-derived products of four major phytoplankton functional types (PFTs – diatoms, haptophytes, prokaryotes and dinoflagellates) was carried out to investigate the PFT time series in the Atlantic Ocean between 2002 and 2021. The investigation includes the 2-decade trends, climatology, phenology and anomaly of PFTs for the whole Atlantic Ocean and its different biogeochemical provinces in the surface layer that optical satellite signals can reach. The PFT time series over the whole Atlantic region showed mostly no clear trend over the last 2 decades, except for a small decline in prokaryotes and an abrupt increase in diatoms during 2018–2019, which is mainly observed in the northern Longhurst provinces. The phenology of diatoms, haptophytes and dinoflagellates is very similar: at higher latitudes bloom maxima are reached in spring (April in the Northern Hemisphere and October in the Southern Hemisphere), in the oligotrophic regions in winter time and in the tropical regions during May to September. In general, prokaryotes show opposite annual cycles to the other three PFTs and present more spatial complexity. The PFT anomaly (in percent) of 2021 compared to the 20-year mean reveals mostly a slight decrease in diatoms and a prominent increase in haptophytes in most areas of the high latitudes. Both diatoms and prokaryotes show a mild decrease along coastlines and an increase in the gyres, while prokaryotes show a clear decrease at mid-latitudes to low latitudes and an increase on the western African coast (Canary Current Coastal Province, CNRY and Guinea Current Coastal Province, GUIN) and southwestern corner of North Atlantic Tropical Gyral Province (NATR). Dinoflagellates, as a minor contributor to the total biomass, are relatively stable in the whole Atlantic region. This study illustrated the past and current PFT state in the Atlantic Ocean and acted as the first step to promote long-term consistent PFT observations that enable time series analyses of PFT trends and interannual ...

وصف الملف: application/pdf

العلاقة: https://sp.copernicus.org/articles/1-osr7/5/2023Test/

الإتاحة: https://doi.org/10.5194/sp-1-osr7-5-2023Test
https://sp.copernicus.org/articles/1-osr7/5/2023Test/

المؤلفون: Jaccard, Pierre, Hjermann, Dag Øystein, Ruohola, Jani, Marty, Sabine, Kristiansen, Trond, Sørensen, Kai, Kaitala, Seppo, Mangin, Antoine, Pouliquen, Sylvie

الوصف: The quality of the INSITU_GLO_BGC_DISCRETE_MY_013_046 product from the Copernicus Marine Service distribution is assessed through overall quality and spatial coverage of the following variables: Chlorophyll FLU2 (chlorophyll-a fluorescence; [mg m-3]) CPHL (chlorophyll-a concentration [mg m-3]) Oxygen DOXY (dissolved oxygen [mmol m-3]) DOX1 (dissolved oxygen [ml l-1]) DOX2 (dissolved oxygen [μmol kg-1]) Nutrients NTRA (nitrate [mmol m-3]) NTAW (nitrate [μmol kg-1]) SLCA (silicate [mmol m-3]) PHOS (phosphate [mmol m-3]) The particularity of any oceanographic in-situ measurements dataset is that the horizontal and vertical coverage of the dataset varies strongly along time following the technological developments and the international cooperation on observations networks. One should thus ensure that both the vertical coverage and the horizontal coverage fit his needs in terms of sampled ocean variability scales before using the data. Therefore, the horizontal coverage of the dataset for chlorophyll, oxygen, nitrate, silicate, and phosphate variables are shown. As a measure of the overall quality of the data, the amount of data flagged as “good data” and “bad data”, respectively, during the quality control procedure is shown and discussed. For additional information regarding the in-depth validation of this product, the calculation of the assessment metrics presented in this product other detailed information in quality and noticeable events please refer to the reference quid document CMEMC-INS-QUID-013_046. Important notice: The contents of this document are an assessment based on the best set of observations available for evaluation at the time the operational system was validated. The validation methodology was defined and agreed within Copernicus Marine Service, inheriting the long experience of MyOcean and MERSEA series of projects (Hernandez et al., 2018) The results presented in this report and derived estimated accuracy numbers (EAN) are representative of average error levels over large areas of the ocean. ...

وصف الملف: application/pdf

العلاقة: https://archimer.ifremer.fr/doc/00437/54846/109193.pdfTest; https://archimer.ifremer.fr/doc/00437/54846/109194.pdfTest; https://archimer.ifremer.fr/doc/00437/54846Test/

الإتاحة: https://doi.org/10.13155/54846Test
https://archimer.ifremer.fr/doc/00437/54846/109193.pdfTest
https://archimer.ifremer.fr/doc/00437/54846/109194.pdfTest
https://archimer.ifremer.fr/doc/00437/54846Test/

المؤلفون: Bertin, Clément, Matsuoka, Atsushi, Mangin, Antoine, Babin, Marcel

الوصف: In response to global warming, the Arctic is undergoing rapid and unprecedented changes that alter the land-to-sea forcing in large Arctic rivers. Improving our knowledge of terrestrial dissolved organic carbon (tDOC) flux to the coastal Arctic Ocean (AO) is thus critical and timely as these changes strongly alter the biogeochemical cycles on AO shelves. In this study, we merged riverine in situ tDOC concentrations with satellite ocean color estimates retrieved at the land-marine interface of the Mackenzie Delta to make a first assessment of the tDOC export from its main outlets to the shelf. We combined tDOC and river discharge data to develop a regression model that simulated tDOC concentrations and fluxes from daily to interannual (2003–2017) time scales. We then compared the simulated satellite-derived estimates to those simulated by the model constrained by in situ tDOC data only. As the satellite tDOC estimates reflect the delta effect in terms of tDOC enrichment and removal, our results inform us of how much tDOC can potentially leave the delta to reach the ocean (1.44 ± 0.14 TgC.yr−1). The chemodynamic relationships and the model suggest contrasting patterns between Shallow Bay and the two easternmost delta outlets, which can be explained by the variability in their geomorphological settings. At the seasonal scale and for all outlets, the satellite-derived tDOC export departs from the estimate based on in situ tDOC data only. During the river freshet in May, the satellite-derived tDOC export is, on average, ~15% (Shallow Bay) to ~20% (Beluga Bay) lower than the in situ-derived estimate. This difference was the highest (−60%) in 2005 and exceeds 30% over most of the last decade, and can be explained by qualitative and quantitative differences between the tDOCin situ and tDOCsat datasets in a period when the freshet is highly variable. In contrast, in summer and fall, the satellite-derived tDOC export is higher than the in situ-derived estimate. The temporal difference between the satellite and in ...

العلاقة: info:eu-repo/grantAgreement/EC/H2020/773421/; https://zenodo.org/communities/nunataryukTest; https://zenodo.org/record/6411915Test; https://doi.org/10.3389/feart.2022.694062Test; oai:zenodo.org:6411915

الإتاحة: https://doi.org/10.3389/feart.2022.694062Test
https://zenodo.org/record/6411915Test

المؤلفون: Meftah, Mustapha, Boust, Fabrice, Keckhut, Philippe, Sarkissian, Alain, Boutéraon, Thomas, Bekki, Slimane, Damé, Luc, Galopeau, Patrick H. M., Hauchecorne, Alain, Dufour, Christophe, Finance, Adrien, Vieau, André-Jean, Bertran, Emmanuel, Gilbert, Pierre, Caignard, Nicolas, Dias, Clément, Engler, Jean-Luc, Lacroix, Patrick, Grossel, Kévin, Rannou, Véronique, Saillant, Stéphane, Avelino, Yannick, Azoulay, Benjamin, Brand, Cyril, Dominguez, Carlos, Haasz, Akos, Paskeviciute, Agne, Segura, Kevin, Maso, Pierre, Ancelin, Sébastien, Mercier, Christophe, Stée, Valentin, Mangin, Antoine, Bolsée, David, Billard, Catherine

المساهمون: STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), DEMR, ONERA, Université Paris Saclay Palaiseau, ONERA-Université Paris-Saclay, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), HELIOS - LATMOS, Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST), Observatoire de Versailles Saint-Quentin-en-Yvelines (OVSQ), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Innovative Solutions In Space Delft (ISIS), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Centre de recherche en épidémiologie et santé des populations (CESP), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay, This research was mainly funded by Centre National de la Recherche Scientifique (CNRS,France), UVSQ (Université de Versailles Saint-Quentin-en-Yvelines, France), Agence Nationale de laRecherche (ANR, France), Office National d’Etudes et de Recherches Aérospatiales (ONERA, France),Développement économique-Saint-Quentin en Yvelines (78, France), and Département des Yvelines(78, France)., ANR-18-CE42-0015,DEVINS,Technologies Détecteurs Innovantes pour l'Observation Spatiale dans l'Ultraviolet Lointain(2018)

المصدر: ISSN: 2072-4292 ; Remote Sensing ; https://insu.hal.science/insu-03506566Test ; Remote Sensing, 2022, 14 (1), pp.186. ⟨10.3390/rs14010186⟩.

مصطلحات موضوعية: ionosphere, Earth’s energy budget, climate observation and monitoring, nanosatellite, CubeSat constellations, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology

الوصف: International audience ; INSPIRE-SAT 7 is a French 2-Unit CubeSat (11.5 × 11.5 × 22.7 cm) primarily designed for Earth and Sun observation. INSPIRE-SAT 7 is one of the missions of the International Satellite Program in Research and Education (INSPIRE). Twice the size of a 4 × 4 Rubik’s Cube and weighing about 3 kg, INSPIRE-SAT 7 will be deployed in Low Earth Orbit (LEO) in 2023 to join its sister satellite, UVSQ-SAT. INSPIRE-SAT 7 represents one of the in-orbit demonstrators needed to test how two Earth observation CubeSats in orbit can be utilized to set up a satellite constellation. This new scientific and technological pathfinder CubeSat mission (INSPIRE-SAT 7) uses a multitude of miniaturized sensors on all sides of the CubeSat to measure the Earth’s energy budget components at the top-of-the-atmosphere for climate change studies. INSPIRE-SAT 7 contains also a High-Frequency (HF) payload that will receive HF signals from a ground-based HF transmitter to probe the ionosphere for space weather studies. Finally, this CubeSat is equipped with several technological demonstrators (total solar irradiance sensors, UV sensors to measure solar spectral irradiance, a new Light Fidelity (Li-Fi) wireless communication system, a new versatile telecommunication system suitable for CubeSat). After introducing the objectives of the INSPIRE-SAT 7 mission, we present the satellite definition and the mission concept of operations. We also briefly show the observations made by the UVSQ-SAT CubeSat, and assess how two CubeSats in orbit could improve the information content of their Earth’s energy budget measurements. We conclude by reporting on the potential of future missions enabled by CubeSat constellations.

العلاقة: insu-03506566; https://insu.hal.science/insu-03506566Test; https://insu.hal.science/insu-03506566/documentTest; https://insu.hal.science/insu-03506566/file/remotesensing-14-00186-v2.pdfTest

الإتاحة: https://doi.org/10.3390/rs14010186Test
https://insu.hal.science/insu-03506566Test
https://insu.hal.science/insu-03506566/documentTest
https://insu.hal.science/insu-03506566/file/remotesensing-14-00186-v2.pdfTest

المؤلفون: Xi, Hongyan, Bretagnon, Marine, Losa, Svetlana N., Brotas, Vanda, Gomes, Mara, Peeken, Ilka, Mangin, Antoine, Bracher, Astrid

المصدر: eISSN: 2752-0706

وصف الملف: application/pdf

العلاقة: https://sp.copernicus.org/preprints/sp-2022-6Test/

الإتاحة: https://doi.org/10.5194/sp-2022-6Test
https://sp.copernicus.org/preprints/sp-2022-6Test/