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Registros recuperados: 9
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A large-scale view of oceanic variability from 2007 to 2015 in the global high resolution monitoring and forecasting system at Mercator Océan ArchiMer
Gasparin, Florent; Greiner, Eric; Lellouche, Jean-michel; Legalloudec, Olivier; Garric, Gilles; Drillet, Yann; Bourdalle-badie, Romain; Le Traon, Pierre-yves; Remy, Elisabeth; Drevillon, Marie.
The global high resolution monitoring and forecasting system PSY4 at Mercator Océan, initialized in October 2006, has achieved 11 years of global ocean state estimation. Based on the NEMO global 1/12° configuration, PSY4 includes data assimilation of satellite and multi-instrument in situ observations. In parallel to this monitoring system, a twin-free simulation (with no assimilation) has been performed for the period 2007-2015. In this study, monthly-averaged fields of both ocean state estimates are compared with observation products for the period 2007-2015, to examine the consistency of PSY4 fields with related observations for representing large-scale variability and to provide a baseline that is mainly focused on in situ comparisons for...
Tipo: Text Palavras-chave: Global ocean monitoring and forecasting system; Climate variability; System evaluation/qualification; Global ocean observing system.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00448/55956/57550.pdf
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Assessing the impact of multiple altimeter missions and Argo in a global eddy-permitting data assimilation system ArchiMer
Verrier, Simon; Le Traon, Pierre-yves; Remy, Elisabeth.
A series of observing system simulation experiments (OSSEs) is carried out with a global data assimilation system at 1∕4° resolution using simulated data derived from a 1∕12° resolution free-run simulation. The objective is to not only quantify how well multiple altimeter missions and Argo profiling floats can constrain the global ocean analysis and 7-day forecast at 1∕4° resolution but also to better understand the sensitivity of results to data assimilation techniques used in Mercator Ocean operational systems. The impact of multiple altimeter data is clearly evidenced even at a 1∕4° resolution. Seven-day forecasts of sea level and ocean currents are significantly improved when moving from one altimeter to two altimeters not only on the sea level, but...
Tipo: Text
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00416/52780/53660.pdf
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Assessing the impact of SAR altimetry for global ocean analysis and forecasting ArchiMer
Verrier, Simon; Le Traon, Pierre-yves; Remy, Elisabeth; Lellouche, Jean Michel.
Satellite altimetry provides essential sea level observations to constrain ocean analysis and forecasting systems. New generation of nadir altimeters now provides enhanced capability thanks to a SAR mode that allows reducing the 1 Hz (7 km) measurement noise level from about 3 to 1 cm RMS. A first assessment of the impact of SAR altimetry for global ocean analysis and forecasting is carried out using Observing System Simulation Experiments (OSSEs) with the global Mercator Ocean high resolution 1/12° system. OSSEs are used to quantify the impact of assimilating multiple altimeter missions with and without a SAR mode. A simple twin experiment set up that only takes into account initialisation errors and impact of altimeter random noise is used. Results are...
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00453/56414/58326.pdf
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Assessment of AtlantOS impact ArchiMer
Remy, Elisabeth.
Assessment of the impact of AtlantOS in situ observing system for Copernicus Marine Service and seasonal prediction
Tipo: Text
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00482/59330/62106.pdf
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CAMBIOS, Vessel mounted ADCP data (RDI NB-75) ArchiMer
Gaillard, Fabienne; Lherminier, Pascale; Remy, Elisabeth; Abel, Karine.
This dataset includes the VMADCP data from the 3 CAMBIOS cruises (processing level: L2b, sofware: Cascade)
Tipo: Dataset Palavras-chave: VMADCP; SADCP; Canary basin; North-East Atlantic; Azores front.
Ano: 2015 URL: http://dx.doi.org/10.17882/40808
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Contribution of future wide-swath altimetry missions to ocean analysis and forecasting ArchiMer
Bonaduce, Antonio; Benkiran, Mounir; Remy, Elisabeth; Le Traon, Pierre-yves; Garric, Gilles.
The impact of forthcoming wide-swath altimetry missions on the ocean analysis and forecasting system was investigated by means of OSSEs (observing system simulation experiments). These experiments were performed with a regional data assimilation system, implemented in the Iberian-Biscay-Ireland (IBI) region, at 1/12 degrees resolution using simulated observations derived from a fully eddy-resolving free simulation at 1/36 degrees resolution over the same region. The objective of the experiments was to assess the ability of different satellite constellations to constrain the ocean analyses and forecasts, considering both along-track altimeters and future wide-swath missions; consequently, the capability of the data assimilation techniques used in the...
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00469/58116/60549.pdf
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From Observation to Information and Users: The Copernicus Marine Service Perspective ArchiMer
Le Traon, Pierre-yves; Reppucci, Antonio; Alvarez Fanjul, Enrique; Aouf, Lotfi; Behrens, Arno; Belmonte, Maria; Bentamy, Abderrahim; Bertino, Laurent; Brando, Vittorio Ernesto; Kreiner, Matilde Brandt; Benkiran, Mounir; Carval, Thierry; Ciliberti, Stefania A.; Claustre, Hervé; Clementi, Emanuela; Coppini, Giovanni; Cossarini, Gianpiero; De Alfonso Alonso-muñoyerro, Marta; Delamarche, Anne; Dibarboure, Gerald; Dinessen, Frode; Drevillon, Marie; Drillet, Yann; Faugere, Yannice; Fernández, Vicente; Fleming, Andrew; Garcia-hermosa, M. Isabel; Sotillo, Marcos García; Garric, Gilles; Gasparin, Florent; Giordan, Cedric; Gehlen, Marion; Gregoire, Marilaure L.; Guinehut, Stephanie; Hamon, Michel; Harris, Chris; Hernandez, Fabrice; Hinkler, Jørgen B.; Hoyer, Jacob; Karvonen, Juha; Kay, Susan; King, Robert; Lavergne, Thomas; Lemieux-dudon, Benedicte; Lima, Leonardo; Mao, Chongyuan; Martin, Matthew J; Masina, Simona; Melet, Angelique; Buongiorno Nardelli, Bruno; Nolan, Glenn; Pascual, Ananda; Pistoia, Jenny; Palazov, Atanas; Piolle, Jean-francois; Pujol, Marie Isabelle; Pequignet, Anne Christine; Peneva, Elisaveta; Pérez Gómez, Begoña; Petit De La Villeon, Loic; Pinardi, Nadia; Pisano, Andrea; Pouliquen, Sylvie; Reid, Rebecca; Remy, Elisabeth; Santoleri, Rosalia; Siddorn, John; She, Jun; Staneva, Joanna; Stoffelen, Ad; Tonani, Marina; Vandenbulcke, Luc; Von Schuckmann, Karina; Volpe, Gianluca; Wettre, Cecilie; Zacharioudaki, Anna.
The Copernicus Marine Environment Monitoring Service (CMEMS) provides regular and systematic reference information on the physical and biogeochemical ocean and sea-ice state for the global ocean and the European regional seas. CMEMS serves a wide range of users (more than 15,000 users are now registered to the service) and applications. Observations are a fundamental pillar of the CMEMS value-added chain that goes from observation to information and users. Observations are used by CMEMS Thematic Assembly Centres (TACs) to derive high-level data products and by CMEMS Monitoring and Forecasting Centres (MFCs) to validate and constrain their global and regional ocean analysis and forecasting systems. This paper presents an overview of CMEMS, its evolution,...
Tipo: Text Palavras-chave: Ocean; Observing systems; Satellite; In situ; Data assimilation; Services.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00498/60983/64389.pdf
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Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system ArchiMer
Lellouche, Jean-michel; Greiner, Eric; Le Galloudec, Olivier; Garric, Gilles; Regnier, Charly; Drevillon, Marie; Benkiran, Mounir; Testut, Charles-emmanuel; Bourdalle-badie, Romain; Gasparin, Florent; Hernandez, Olga; Levier, Bruno; Drilled, Yann; Remy, Elisabeth; Le Traon, Pierre-yves.
Since 19 October 2016, and in the framework of Copernicus Marine Environment Monitoring Service (CMEMS), Mercator Ocean has delivered real-time daily services (weekly analyses and daily 10-day forecasts) with a new global 1∕12° high-resolution (eddy-resolving) monitoring and forecasting system. The model component is the NEMO platform driven at the surface by the IFS ECMWF atmospheric analyses and forecasts. Observations are assimilated by means of a reduced-order Kalman filter with a three-dimensional multivariate modal decomposition of the background error. Along-track altimeter data, satellite sea surface temperature, sea ice concentration, and in situ temperature and salinity vertical profiles are jointly assimilated to estimate the initial conditions...
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00458/56993/58884.pdf
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The Benefits of the Ka-Band as Evidenced from the SARAL/AltiKa Altimetric Mission: Scientific Applications ArchiMer
Verron, Jacques; Bonnefond, Pascal; Aouf, Lofti; Birol, Florence; Bhowmick, Suchandra A.; Calmant, Stephane; Conchy, Taina; Cretaux, Jean-francois; Dibarboure, Gerald; Dubey, A. K.; Faugere, Yannice; Guerreiro, Kevin; Gupta, P. K.; Hamon, Mathieu; Jebri, Fatma; Kumar, Raj; Morrow, Rosemary; Pascual, Ananda; Pujol, Marie-isabelle; Remy, Elisabeth; Remy, Frederique; Smith, Walter H. F.; Tournadre, Jean; Vergara, Oscar.
The India-France SARAL/AltiKa mission is the first Ka-band altimetric mission dedicated primarily to oceanography. The mission objectives were firstly the observation of the oceanic mesoscales but also global and regional sea level monitoring, including the coastal zone, data assimilation, and operational oceanography. SARAL/AltiKa proved also to be a great opportunity for inland waters applications, for observing ice sheet or icebergs, as well as for geodetic investigations. The mission ended its nominal phase after three years in orbit and began a new phase (drifting orbit) in July 2016. The objective of this paper is to highlight some of the most remarkable achievements of the SARAL/AltiKa mission in terms of scientific applications. Compared to the...
Tipo: Text Palavras-chave: Altimetry; Ka-band; Oceanography; Hydrology; Ice; Geodesy.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00600/71248/69623.pdf
Registros recuperados: 9
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