Contribution of thermal expansion to present-day sea-level change revisited
0921-8181 We investigate the thermosteric (i.e., due to temperature only) sea-level change over the last 50 years using two global ocean temperature data sets recently published (Levitus et al., 2000a [Levitus, S., Stephens, C.M., Antonov, J.I., Boyer, T.P., 2000a. Yearly and year-season upper ocean...
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ftunivnantes:oai:HAL:hal-00409121v1 2023-05-15T17:35:58+02:00 Contribution of thermal expansion to present-day sea-level change revisited Lombard, A. Cazenave, A. Le Traon, P. Y. Ishii, M. Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) 2005 https://hal.science/hal-00409121 en eng HAL CCSD Elsevier hal-00409121 https://hal.science/hal-00409121 ISSN: 0921-8181 Global and Planetary Change https://hal.science/hal-00409121 Global and Planetary Change, 2005, 47 (1), pp.1-16 info:eu-repo/semantics/article Journal articles 2005 ftunivnantes 2023-02-22T00:32:56Z 0921-8181 We investigate the thermosteric (i.e., due to temperature only) sea-level change over the last 50 years using two global ocean temperature data sets recently published (Levitus et al., 2000a [Levitus, S., Stephens, C.M., Antonov, J.I., Boyer, T.P., 2000a. Yearly and year-season upper ocean temperature anomaly fields, 1948-1998, pp. 23, U.S. Gov. Printing Office, Washington, DC] and Ishii et al., 2003 [Ishii, M., Kimoto, M., Kachi, M., 2003. Historical ocean subsurface temperature analysis with error estimates, Monthly Weather Rev., 131, 51-73]). These data sets which provide gridded temperatures, down to 3000 in and 500 m respectively, are based on interpolation schemes of raw historical profiles over 1950-1998. We find that the two data sets compare well over 1950-1990, both in terms of thermosteric sea-level trends and global mean. Some difference is noticed however beyond 1990, due to differences in the raw temperature data processing. Analyses based on 'Empirical Orthogonal Function' show that the interannual variability of the thermosteric sea level is dominated by the signatures of El Nino Southern Oscillation, Pacific Decadal Oscillation and influenced by North Atlantic Oscillation. As a result, regional thermosteric sea-level trends are not stationary on a century time scale and have a typical lifetime on the order of a decade. In terms of global mean, the rate of thermosteric sea-level change computed over 10-year windows displays high variability, with values reaching up to three times the 40-year (1950-1990) average at some periods. Even negative values are noticed at other periods. One important consequence is that the pattern of sea-level trends derived from Topex/Poseidon altimetry over 1993-2003, which is mainly caused by thermal expansion, is very likely a non-permanent feature. Thus past and future extrapolation based on this 10-year altimetry pattern should be considered with caution. (c) 2004 Published by Elsevier B.V. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Université de Nantes: HAL-UNIV-NANTES Kachi ENVELOPE(138.618,138.618,59.831,59.831) Pacific |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
description |
0921-8181 We investigate the thermosteric (i.e., due to temperature only) sea-level change over the last 50 years using two global ocean temperature data sets recently published (Levitus et al., 2000a [Levitus, S., Stephens, C.M., Antonov, J.I., Boyer, T.P., 2000a. Yearly and year-season upper ocean temperature anomaly fields, 1948-1998, pp. 23, U.S. Gov. Printing Office, Washington, DC] and Ishii et al., 2003 [Ishii, M., Kimoto, M., Kachi, M., 2003. Historical ocean subsurface temperature analysis with error estimates, Monthly Weather Rev., 131, 51-73]). These data sets which provide gridded temperatures, down to 3000 in and 500 m respectively, are based on interpolation schemes of raw historical profiles over 1950-1998. We find that the two data sets compare well over 1950-1990, both in terms of thermosteric sea-level trends and global mean. Some difference is noticed however beyond 1990, due to differences in the raw temperature data processing. Analyses based on 'Empirical Orthogonal Function' show that the interannual variability of the thermosteric sea level is dominated by the signatures of El Nino Southern Oscillation, Pacific Decadal Oscillation and influenced by North Atlantic Oscillation. As a result, regional thermosteric sea-level trends are not stationary on a century time scale and have a typical lifetime on the order of a decade. In terms of global mean, the rate of thermosteric sea-level change computed over 10-year windows displays high variability, with values reaching up to three times the 40-year (1950-1990) average at some periods. Even negative values are noticed at other periods. One important consequence is that the pattern of sea-level trends derived from Topex/Poseidon altimetry over 1993-2003, which is mainly caused by thermal expansion, is very likely a non-permanent feature. Thus past and future extrapolation based on this 10-year altimetry pattern should be considered with caution. (c) 2004 Published by Elsevier B.V. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Lombard, A. Cazenave, A. Le Traon, P. Y. Ishii, M. |
spellingShingle |
Lombard, A. Cazenave, A. Le Traon, P. Y. Ishii, M. Contribution of thermal expansion to present-day sea-level change revisited |
author_facet |
Lombard, A. Cazenave, A. Le Traon, P. Y. Ishii, M. |
author_sort |
Lombard, A. |
title |
Contribution of thermal expansion to present-day sea-level change revisited |
title_short |
Contribution of thermal expansion to present-day sea-level change revisited |
title_full |
Contribution of thermal expansion to present-day sea-level change revisited |
title_fullStr |
Contribution of thermal expansion to present-day sea-level change revisited |
title_full_unstemmed |
Contribution of thermal expansion to present-day sea-level change revisited |
title_sort |
contribution of thermal expansion to present-day sea-level change revisited |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00409121 |
long_lat |
ENVELOPE(138.618,138.618,59.831,59.831) |
geographic |
Kachi Pacific |
geographic_facet |
Kachi Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0921-8181 Global and Planetary Change https://hal.science/hal-00409121 Global and Planetary Change, 2005, 47 (1), pp.1-16 |
op_relation |
hal-00409121 https://hal.science/hal-00409121 |
_version_ |
1766135288837439488 |