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Caractérisation des effets du réchauffement climatique sur l'océan superficiel au cours des 50 dernières années ArchiMer
Hamon, Mathieu.
To identify and characterize the effects of global warming is one of the major scientific challenges of this new century. The rise of sea level, the hydrological changes are some consequences of this phenomenon which will influence all forms of life on Earth. Due to its high thermal capacity, it is estimated that 84% of the energy developed by global warming is stored in the first layers of the ocean. However, it is rather difficult to assess its overall impact over the last 50 years because the ocean is not warming uniformly and the inhomogeneous sampling (spatial and temporal) of oceanographic observations, instrumental errors (XBT) and biases related to the estimation process of global indicators can affect our assessment of the evolution of ocean...
Tipo: Text Palavras-chave: Réchauffement climatique; Observations in situ; Biais XBT; Reconstruction de champs; Contenu thermique; Contenu d’eau douce; Global warming; In situ measurement; XBT bias; Field reconstruction; Heat content; Freshwater content.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00498/60957/64360.pdf
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Consistency of the current global ocean observing systems from an Argo perspective ArchiMer
Von Schuckmann, Karina; Sallee, Jean-baptiste; Chambers, D.; Le Traon, Pierre-yves; Cabanes, Cecile; Gaillard, Fabienne; Speich, Sabrina; Hamon, Mathieu.
Variations in the world's ocean heat storage and its associated volume changes are a key factor to gauge global warming and to assess the earth's energy and sea level budget. Estimating global ocean heat content (GOHC) and global steric sea level (GSSL) with temperature/salinity data from the Argo network reveals a positive change of 0.5 +/- 0.1 W m(-2) (applied to the surface area of the ocean) and 0.5 +/- 0.1 mm year(-1) during the years 2005 to 2012, averaged between 60 degrees S and 60 degrees N and the 10-1500m depth layer. In this study, we present an intercomparison of three global ocean observing systems: the Argo network, satellite gravimetry from GRACE and satellite altimetry. Their consistency is investigated from an Argo perspective at global...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00202/31365/29753.pdf
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Requirements for an Integrated in situ Atlantic Ocean Observing System From Coordinated Observing System Simulation Experiments ArchiMer
Gasparin, Florent; Guinehut, Stephanie; Mao, Chongyuan; Mirouze, Isabelle; Rémy, Elisabeth; King, Robert R.; Hamon, Mathieu; Reid, Rebecca; Storto, Andrea; Le Traon, Pierre-yves; Martin, Matthew J.; Masina, Simona.
A coordinated effort, based on observing system simulation experiments (OSSEs), has been carried out by four European ocean forecasting centers for the first time, in order to provide insights on the present and future design of the in situ Atlantic Ocean observing system from a monitoring and forecasting perspective. This multi-system approach is based on assimilating synthetic data sets, obtained by sub-sampling in space and time using an eddy-resolving unconstrained simulation, named the Nature Run. To assess the ability of a given Atlantic Ocean observing system to constrain the ocean model state, a set of assimilating experiments were performed using four global eddy-permitting systems. For each set of experiments, different designs of the in situ...
Tipo: Text Palavras-chave: Observing system simulation experiment; H2020 AtlantOS project; Argo float; Deep observations; Drifter; Global monitoring and forecasting systems.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00485/59623/62651.pdf
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The Copernicus Marine Environment Monitoring Service Ocean State Report ArchiMer
Von Schuckmann, Karina; Le Traon, Pierre-yves; Alvarez-fanjul, Enrique; Axell, Lars; Balmaseda, Magdalena; Breivik, Lars-anders; Brewin, Robert J. W.; Bricaud, Clement; Drevillon, Marie; Drillet, Yann; Dubois, Clotilde; Embury, Owen; Etienne, Helene; Garcia Sotillo, Marcos; Garric, Gilles; Gasparin, Florent; Gutknecht, Elodie; Guinehut, Stephanie; Hernandez, Fabrice; Juza, Melanie; Karlson, Bengt; Korres, Gerasimos; Legeais, Jean Francois; Levier, Bruno; Lien, Vidar S.; Morrow, Rosemary; Notarstefano, Giulio; Parent, Laurent; Pascual, Alvaro; Perez-gomez, Begona; Perruche, Coralie; Pinardi, Nadia; Pisano, Andrea; Poulain, Pierre-marie; Pujol, Isabelle M.; Raj, Roshin P.; Raudsepp, Urmas; Roquet, Herve; Samuelsen, Annette; Sathyendranath, Shubha; She, Jun; Simoncelli, Simona; Solidoro, Cosimo; Tinker, Jonathan; Tintore, Joaquin; Viktorsson, Lena; Ablain, Michael; Almroth-rosell, Elin; Bonaduce, Antonio; Clementi, Emanuela; Cossarini, Gianpiero; Dagneaux, Quentin; Desportes, Charles; Dye, Stephen; Fratianni, Claudia; Good, Simon; Greiner, Eric; Gourrion, Jerome; Hamon, Mathieu; Holt, Jason; Hyder, Pat; Kennedy, John; Manzano-munoz, Fernando; Melet, Angelique; Meyssignac, Benoit; Mulet, Sandrine; Nardelli, Bruno Buongiorno; O'Dea, Enda; Olason, Einar; Paulmier, Aurelien; Perez-gonzalez, Irene; Reid, Rebecca; Racault, Marie-fanny; Raitsos, Dionysios E.; Ramos, Antonio; Sykes, Peter; Szekely, Tanguy; Verbrugge, Nathalie.
The Copernicus Marine Environment Monitoring Service (CMEMS) Ocean State Report (OSR) provides an annual report of the state of the global ocean and European regional seas for policy and decision-makers with the additional aim of increasing general public awareness about the status of, and changes in, the marine environment. The CMEMS OSR draws on expert analysis and provides a 3-D view (through reanalysis systems), a view from above (through remote-sensing data) and a direct view of the interior (through in situ measurements) of the global ocean and the European regional seas. The report is based on the unique CMEMS monitoring capabilities of the blue (hydrography, currents), white (sea ice) and green (e.g. Chlorophyll) marine environment. This first...
Tipo: Text Palavras-chave: Copernicus Marine Environment Monitoring Service; Ocean reporting; Ocean monitoring; State of the ocean; Ocean variability; Operational oceanography; Ocean climate variability.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00383/49471/49959.pdf
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