Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses
International audience Quantifying the effect of the seawater density changes on sea level variability is of crucial importance for climate change studies, as the sea level cumulative rise can be regarded as both an important climate change indicator and a possible danger for human activities in coa...
Published in: | Climate Dynamics |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03684928 https://doi.org/10.1007/s00382-015-2554-9 |
id |
ftunivnantes:oai:HAL:insu-03684928v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Ocean reanalysis evaluation Sea level variability Altimetry Gravimetry [SDU]Sciences of the Universe [physics] |
spellingShingle |
Ocean reanalysis evaluation Sea level variability Altimetry Gravimetry [SDU]Sciences of the Universe [physics] Storto, Andrea Masina, Simona Balmaseda, Magdalena Guinehut, Stéphanie Xue, Yan Szekely, Tanguy Fukumori, Ichiro Forget, Gael Chang, You-Soon Good, Simon A. Köhl, Armin Vernieres, Guillaume Ferry, Nicolas Peterson, K. Andrew Behringer, David Ishii, Masayoshi Masuda, Shuhei Fujii, Yosuke Toyoda, Takahiro Yin, Yonghong Valdivieso, Maria Barnier, Bernard Boyer, Tim Lee, Tony Gourrion, Jérome Wang, Ou Heimback, Patrick Rosati, Anthony Kovach, Robin Hernandez, Fabrice Martin, Matthew J. Kamachi, Masafumi Kuragano, Tsurane Mogensen, Kristian Alves, Oscar Haines, Keith Wang, Xiaochun Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses |
topic_facet |
Ocean reanalysis evaluation Sea level variability Altimetry Gravimetry [SDU]Sciences of the Universe [physics] |
description |
International audience Quantifying the effect of the seawater density changes on sea level variability is of crucial importance for climate change studies, as the sea level cumulative rise can be regarded as both an important climate change indicator and a possible danger for human activities in coastal areas. In this work, as part of the Ocean Reanalysis Intercomparison Project, the global and regional steric sea level changes are estimated and compared from an ensemble of 16 ocean reanalyses and 4 objective analyses. These estimates are initially compared with a satellite-derived (altimetry minus gravimetry) dataset for a short period (2003-2010). The ensemble mean exhibits a significant high correlation at both global and regional scale, and the ensemble of ocean reanalyses outperforms that of objective analyses, in particular in the Southern Ocean. The reanalysis ensemble mean thus represents a valuable tool for further analyses, although large uncertainties remain for the inter-annual trends. Within the extended intercomparison period that spans the altimetry era (1993-2010), we find that the ensemble of reanalyses and objective analyses are in good agreement, and both detect a trend of the global steric sea level of 1.0 and 1.1 ± 0.05 mm/year, respectively. However, the spread among the products of the halosteric component trend exceeds the mean trend itself, questioning the reliability of its estimate. This is related to the scarcity of salinity observations before the Argo era. Furthermore, the impact of deep ocean layers is non-negligible on the steric sea level variability (22 and 12 % for the layers below 700 and 1500 m of depth, respectively), although the small deep ocean trends are not significant with respect to the products spread. |
author2 |
Collecte Localisation Satellites (CLS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National d'Études Spatiales Toulouse (CNES) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Storto, Andrea Masina, Simona Balmaseda, Magdalena Guinehut, Stéphanie Xue, Yan Szekely, Tanguy Fukumori, Ichiro Forget, Gael Chang, You-Soon Good, Simon A. Köhl, Armin Vernieres, Guillaume Ferry, Nicolas Peterson, K. Andrew Behringer, David Ishii, Masayoshi Masuda, Shuhei Fujii, Yosuke Toyoda, Takahiro Yin, Yonghong Valdivieso, Maria Barnier, Bernard Boyer, Tim Lee, Tony Gourrion, Jérome Wang, Ou Heimback, Patrick Rosati, Anthony Kovach, Robin Hernandez, Fabrice Martin, Matthew J. Kamachi, Masafumi Kuragano, Tsurane Mogensen, Kristian Alves, Oscar Haines, Keith Wang, Xiaochun |
author_facet |
Storto, Andrea Masina, Simona Balmaseda, Magdalena Guinehut, Stéphanie Xue, Yan Szekely, Tanguy Fukumori, Ichiro Forget, Gael Chang, You-Soon Good, Simon A. Köhl, Armin Vernieres, Guillaume Ferry, Nicolas Peterson, K. Andrew Behringer, David Ishii, Masayoshi Masuda, Shuhei Fujii, Yosuke Toyoda, Takahiro Yin, Yonghong Valdivieso, Maria Barnier, Bernard Boyer, Tim Lee, Tony Gourrion, Jérome Wang, Ou Heimback, Patrick Rosati, Anthony Kovach, Robin Hernandez, Fabrice Martin, Matthew J. Kamachi, Masafumi Kuragano, Tsurane Mogensen, Kristian Alves, Oscar Haines, Keith Wang, Xiaochun |
author_sort |
Storto, Andrea |
title |
Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses |
title_short |
Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses |
title_full |
Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses |
title_fullStr |
Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses |
title_full_unstemmed |
Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses |
title_sort |
steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03684928 https://doi.org/10.1007/s00382-015-2554-9 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal-insu.archives-ouvertes.fr/insu-03684928 Climate Dynamics, 2017, 49, pp.709-729. ⟨10.1007/s00382-015-2554-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-015-2554-9 insu-03684928 https://hal-insu.archives-ouvertes.fr/insu-03684928 BIBCODE: 2017ClDy.49.709S doi:10.1007/s00382-015-2554-9 |
op_doi |
https://doi.org/10.1007/s00382-015-2554-9 |
container_title |
Climate Dynamics |
container_volume |
49 |
container_issue |
3 |
container_start_page |
709 |
op_container_end_page |
729 |
_version_ |
1766207386532446208 |
spelling |
ftunivnantes:oai:HAL:insu-03684928v1 2023-05-15T18:25:45+02:00 Steric sea level variability (1993-2010) in an ensemble of ocean reanalyses and objective analyses Storto, Andrea Masina, Simona Balmaseda, Magdalena Guinehut, Stéphanie Xue, Yan Szekely, Tanguy Fukumori, Ichiro Forget, Gael Chang, You-Soon Good, Simon A. Köhl, Armin Vernieres, Guillaume Ferry, Nicolas Peterson, K. Andrew Behringer, David Ishii, Masayoshi Masuda, Shuhei Fujii, Yosuke Toyoda, Takahiro Yin, Yonghong Valdivieso, Maria Barnier, Bernard Boyer, Tim Lee, Tony Gourrion, Jérome Wang, Ou Heimback, Patrick Rosati, Anthony Kovach, Robin Hernandez, Fabrice Martin, Matthew J. Kamachi, Masafumi Kuragano, Tsurane Mogensen, Kristian Alves, Oscar Haines, Keith Wang, Xiaochun Collecte Localisation Satellites (CLS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National d'Études Spatiales Toulouse (CNES) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Centre National de la Recherche Scientifique (CNRS) 2017 https://hal-insu.archives-ouvertes.fr/insu-03684928 https://doi.org/10.1007/s00382-015-2554-9 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-015-2554-9 insu-03684928 https://hal-insu.archives-ouvertes.fr/insu-03684928 BIBCODE: 2017ClDy.49.709S doi:10.1007/s00382-015-2554-9 ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal-insu.archives-ouvertes.fr/insu-03684928 Climate Dynamics, 2017, 49, pp.709-729. ⟨10.1007/s00382-015-2554-9⟩ Ocean reanalysis evaluation Sea level variability Altimetry Gravimetry [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2017 ftunivnantes https://doi.org/10.1007/s00382-015-2554-9 2023-03-01T01:39:43Z International audience Quantifying the effect of the seawater density changes on sea level variability is of crucial importance for climate change studies, as the sea level cumulative rise can be regarded as both an important climate change indicator and a possible danger for human activities in coastal areas. In this work, as part of the Ocean Reanalysis Intercomparison Project, the global and regional steric sea level changes are estimated and compared from an ensemble of 16 ocean reanalyses and 4 objective analyses. These estimates are initially compared with a satellite-derived (altimetry minus gravimetry) dataset for a short period (2003-2010). The ensemble mean exhibits a significant high correlation at both global and regional scale, and the ensemble of ocean reanalyses outperforms that of objective analyses, in particular in the Southern Ocean. The reanalysis ensemble mean thus represents a valuable tool for further analyses, although large uncertainties remain for the inter-annual trends. Within the extended intercomparison period that spans the altimetry era (1993-2010), we find that the ensemble of reanalyses and objective analyses are in good agreement, and both detect a trend of the global steric sea level of 1.0 and 1.1 ± 0.05 mm/year, respectively. However, the spread among the products of the halosteric component trend exceeds the mean trend itself, questioning the reliability of its estimate. This is related to the scarcity of salinity observations before the Argo era. Furthermore, the impact of deep ocean layers is non-negligible on the steric sea level variability (22 and 12 % for the layers below 700 and 1500 m of depth, respectively), although the small deep ocean trends are not significant with respect to the products spread. Article in Journal/Newspaper Southern Ocean Université de Nantes: HAL-UNIV-NANTES Southern Ocean Climate Dynamics 49 3 709 729 |