In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height
The In Situ Analysis System (ISAS) was developed to produce gridded fields of temperature and salinity that preserve as much as possible the time and space sampling capabilities of the Argo network of profiling floats. Since the first global re-analysis performed in 2009, the system has evolved and...
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Online Access: | https://hal.science/hal-04200751 https://hal.science/hal-04200751/document https://hal.science/hal-04200751/file/clim-jcli-d-15-0028.1.pdf https://doi.org/10.1175/JCLI-D-15-0028.1 |
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ftccsdartic:oai:HAL:hal-04200751v1 2023-12-17T10:46:49+01:00 In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height Gaillard, Fabienne Reynaud, Thierry Thierry, Virginie Kolodziejczyk, Nicolas von Schuckmann, Karina Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2016-02 https://hal.science/hal-04200751 https://hal.science/hal-04200751/document https://hal.science/hal-04200751/file/clim-jcli-d-15-0028.1.pdf https://doi.org/10.1175/JCLI-D-15-0028.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-15-0028.1 hal-04200751 https://hal.science/hal-04200751 https://hal.science/hal-04200751/document https://hal.science/hal-04200751/file/clim-jcli-d-15-0028.1.pdf doi:10.1175/JCLI-D-15-0028.1 info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-04200751 Journal of Climate, 2016, 29 (4), pp.1305-1323. ⟨10.1175/JCLI-D-15-0028.1⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1175/JCLI-D-15-0028.1 2023-11-18T23:43:45Z The In Situ Analysis System (ISAS) was developed to produce gridded fields of temperature and salinity that preserve as much as possible the time and space sampling capabilities of the Argo network of profiling floats. Since the first global re-analysis performed in 2009, the system has evolved and a careful delayed mode processing of the 2002-2012 dataset has been carried out using version 6 of ISAS and updating the statistics to produce the ISAS13 analysis. This last version is now implemented as the operational analysis tool at the Coriolis data centre. The robustness of the results with respect to the system evolution is explored through global quantities of climatological interest: the Ocean Heat Content and the Steric Height. Estimates of errors consistent with the methodology are computed. This study shows that building reliable statistics on the fields is fundamental to improve the monthly estimates and to determine the absolute error bars. The new mean fields and variances deduced from the ISAS13 re-analysis and dataset show significant changes relative to the previous ISAS estimates, in particular in the southern ocean, justifying the iterative procedure. During the decade covered by Argo, the intermediate waters appear warmer and saltier in the North Atlantic and fresher in the Southern Ocean than in WOA05 long term mean. At inter-annual scale, the impact of ENSO on the Ocean Heat Content and Steric Height is observed during the 2006-2007 and 2009-2010 events captured by the network. Article in Journal/Newspaper North Atlantic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Journal of Climate 29 4 1305 1323 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Gaillard, Fabienne Reynaud, Thierry Thierry, Virginie Kolodziejczyk, Nicolas von Schuckmann, Karina In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
The In Situ Analysis System (ISAS) was developed to produce gridded fields of temperature and salinity that preserve as much as possible the time and space sampling capabilities of the Argo network of profiling floats. Since the first global re-analysis performed in 2009, the system has evolved and a careful delayed mode processing of the 2002-2012 dataset has been carried out using version 6 of ISAS and updating the statistics to produce the ISAS13 analysis. This last version is now implemented as the operational analysis tool at the Coriolis data centre. The robustness of the results with respect to the system evolution is explored through global quantities of climatological interest: the Ocean Heat Content and the Steric Height. Estimates of errors consistent with the methodology are computed. This study shows that building reliable statistics on the fields is fundamental to improve the monthly estimates and to determine the absolute error bars. The new mean fields and variances deduced from the ISAS13 re-analysis and dataset show significant changes relative to the previous ISAS estimates, in particular in the southern ocean, justifying the iterative procedure. During the decade covered by Argo, the intermediate waters appear warmer and saltier in the North Atlantic and fresher in the Southern Ocean than in WOA05 long term mean. At inter-annual scale, the impact of ENSO on the Ocean Heat Content and Steric Height is observed during the 2006-2007 and 2009-2010 events captured by the network. |
author2 |
Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Gaillard, Fabienne Reynaud, Thierry Thierry, Virginie Kolodziejczyk, Nicolas von Schuckmann, Karina |
author_facet |
Gaillard, Fabienne Reynaud, Thierry Thierry, Virginie Kolodziejczyk, Nicolas von Schuckmann, Karina |
author_sort |
Gaillard, Fabienne |
title |
In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height |
title_short |
In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height |
title_full |
In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height |
title_fullStr |
In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height |
title_full_unstemmed |
In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height |
title_sort |
in-situ based reanalysis of the global ocean temperature and salinity with isas: variability of the heat content and steric height |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-04200751 https://hal.science/hal-04200751/document https://hal.science/hal-04200751/file/clim-jcli-d-15-0028.1.pdf https://doi.org/10.1175/JCLI-D-15-0028.1 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-04200751 Journal of Climate, 2016, 29 (4), pp.1305-1323. ⟨10.1175/JCLI-D-15-0028.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-15-0028.1 hal-04200751 https://hal.science/hal-04200751 https://hal.science/hal-04200751/document https://hal.science/hal-04200751/file/clim-jcli-d-15-0028.1.pdf doi:10.1175/JCLI-D-15-0028.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JCLI-D-15-0028.1 |
container_title |
Journal of Climate |
container_volume |
29 |
container_issue |
4 |
container_start_page |
1305 |
op_container_end_page |
1323 |
_version_ |
1785570460996468736 |