Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system
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...
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ftcopernicus:oai:publications.copernicus.org:os66698 2023-05-15T18:18:46+02:00 Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system Lellouche, Jean-Michel Greiner, Eric Galloudec, Olivier Garric, Gilles Regnier, Charly Drevillon, Marie Benkiran, Mounir Testut, Charles-Emmanuel Bourdalle-Badie, Romain Gasparin, Florent Hernandez, Olga Levier, Bruno Drillet, Yann Remy, Elisabeth Traon, Pierre-Yves 2018-11-30 application/pdf https://doi.org/10.5194/os-14-1093-2018 https://os.copernicus.org/articles/14/1093/2018/ eng eng doi:10.5194/os-14-1093-2018 https://os.copernicus.org/articles/14/1093/2018/ eISSN: 1812-0792 Text 2018 ftcopernicus https://doi.org/10.5194/os-14-1093-2018 2020-07-20T16:23:06Z 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 for numerical ocean forecasting. A 3D-VAR scheme provides a correction for the slowly evolving large-scale biases in temperature and salinity. This paper describes the recent updates applied to the system and discusses the importance of fine tuning an ocean monitoring and forecasting system. It details more particularly the impact of the initialization, the correction of precipitation, the assimilation of climatological temperature and salinity in the deep ocean, the construction of the background error covariance and the adaptive tuning of observation error on increasing the realism of the analysis and forecasts. The scientific assessment of the ocean estimations are illustrated with diagnostics over some particular years, assorted with time series over the time period 2007–2016. The overall impact of the integration of all updates on the product quality is also discussed, highlighting a gain in performance and reliability of the current global monitoring and forecasting system compared to its previous version. Text Sea ice Copernicus Publications: E-Journals Ocean Science 14 5 1093 1126 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
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 for numerical ocean forecasting. A 3D-VAR scheme provides a correction for the slowly evolving large-scale biases in temperature and salinity. This paper describes the recent updates applied to the system and discusses the importance of fine tuning an ocean monitoring and forecasting system. It details more particularly the impact of the initialization, the correction of precipitation, the assimilation of climatological temperature and salinity in the deep ocean, the construction of the background error covariance and the adaptive tuning of observation error on increasing the realism of the analysis and forecasts. The scientific assessment of the ocean estimations are illustrated with diagnostics over some particular years, assorted with time series over the time period 2007–2016. The overall impact of the integration of all updates on the product quality is also discussed, highlighting a gain in performance and reliability of the current global monitoring and forecasting system compared to its previous version. |
format |
Text |
author |
Lellouche, Jean-Michel Greiner, Eric Galloudec, Olivier Garric, Gilles Regnier, Charly Drevillon, Marie Benkiran, Mounir Testut, Charles-Emmanuel Bourdalle-Badie, Romain Gasparin, Florent Hernandez, Olga Levier, Bruno Drillet, Yann Remy, Elisabeth Traon, Pierre-Yves |
spellingShingle |
Lellouche, Jean-Michel Greiner, Eric Galloudec, Olivier Garric, Gilles Regnier, Charly Drevillon, Marie Benkiran, Mounir Testut, Charles-Emmanuel Bourdalle-Badie, Romain Gasparin, Florent Hernandez, Olga Levier, Bruno Drillet, Yann Remy, Elisabeth Traon, Pierre-Yves Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system |
author_facet |
Lellouche, Jean-Michel Greiner, Eric Galloudec, Olivier Garric, Gilles Regnier, Charly Drevillon, Marie Benkiran, Mounir Testut, Charles-Emmanuel Bourdalle-Badie, Romain Gasparin, Florent Hernandez, Olga Levier, Bruno Drillet, Yann Remy, Elisabeth Traon, Pierre-Yves |
author_sort |
Lellouche, Jean-Michel |
title |
Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system |
title_short |
Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system |
title_full |
Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system |
title_fullStr |
Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system |
title_full_unstemmed |
Recent updates to the Copernicus Marine Service global ocean monitoring and forecasting real-time 1∕12° high-resolution system |
title_sort |
recent updates to the copernicus marine service global ocean monitoring and forecasting real-time 1∕12° high-resolution system |
publishDate |
2018 |
url |
https://doi.org/10.5194/os-14-1093-2018 https://os.copernicus.org/articles/14/1093/2018/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
eISSN: 1812-0792 |
op_relation |
doi:10.5194/os-14-1093-2018 https://os.copernicus.org/articles/14/1093/2018/ |
op_doi |
https://doi.org/10.5194/os-14-1093-2018 |
container_title |
Ocean Science |
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14 |
container_issue |
5 |
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1093 |
op_container_end_page |
1126 |
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1766195461210767360 |