Global Sea Level Budget Assessment by World Climate Research Programme
Global mean sea level is an integral of changes occurring in the climate system in response to unforced climate variability as well as natural and anthropogenic forcing factors. Its temporal evolution allows detecting changes (e.g., acceleration) in one or more components. Study of the sea level bud...
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ftseanoe:oai:seanoe.org:54854 2023-05-15T13:34:06+02:00 Global Sea Level Budget Assessment by World Climate Research Programme Cazenave, Anny Meyssignac, Benoit Palanisamy, Hindumathi North 90.0, South -90.0, East 180.0, West -180.0 2018-04-25 https://doi.org/10.17882/54854 unknown SEANOE doi:10.17882/54854 http://dx.doi.org/10.17882/54854 CC-BY CC-BY ocean climate sea level ice sheets glaciers land waters thermal expansion sea level budget dataset 2018 ftseanoe https://doi.org/10.17882/54854 2021-12-09T18:22:48Z Global mean sea level is an integral of changes occurring in the climate system in response to unforced climate variability as well as natural and anthropogenic forcing factors. Its temporal evolution allows detecting changes (e.g., acceleration) in one or more components. Study of the sea level budget provides constraints on missing or poorly known contributions, such as the unsurveyed deep ocean or the still uncertain land water component. In the context of the World Climate Research Programme Grand Challenge entitled “Regional Sea Level and Coastal Impacts”, an international effort involving the sea level community worldwide has been recently initiated with the objective of assessing the various data sets used to estimate components of the sea level budget during the altimetry era (1993 to present). These data sets are based on the combination of a broad range of space-based and in situ observations, model estimates and algorithms. Evaluating their quality, quantifying uncertainties and identifying sources of discrepancies between component estimates is extremely useful for various applications in climate research. This effort involves several tens of scientists from about sixty research teams/institutions worldwide (www.wcrp-climate.org/grand-challenges/gc-sea-level). The results presented in this paper are a synthesis of the first assessment performed during 2017-2018. We present estimates of the altimetry-based global mean sea level (average rate of 3.1 +/- 0.3 mm/yr and acceleration of 0.1 mm/yr2 over 1993-present), as well as of the different components of the sea level budget. We further examine closure of the sea level budget, comparing the observed global mean sea level with the sum of components. Ocean thermal expansion, glaciers, Greenland and Antarctica contribute by 42%, 21%, 15% and 8% to the global mean sea level over the 1993-present. We also study the sea level budget over 2005-present, using GRACE-based ocean mass estimates instead of sum of individual mass components. Results show closure of the sea level budget within 0.3 mm/yr. Substantial uncertainty remains for the land water storage component, as shown in examining individual mass contributions to sea level. Dataset Antarc* Antarctica Greenland SEANOE (Sea scientific open data publication) Greenland |
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Open Polar |
collection |
SEANOE (Sea scientific open data publication) |
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ftseanoe |
language |
unknown |
topic |
ocean climate sea level ice sheets glaciers land waters thermal expansion sea level budget |
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ocean climate sea level ice sheets glaciers land waters thermal expansion sea level budget Cazenave, Anny Meyssignac, Benoit Palanisamy, Hindumathi Global Sea Level Budget Assessment by World Climate Research Programme |
topic_facet |
ocean climate sea level ice sheets glaciers land waters thermal expansion sea level budget |
description |
Global mean sea level is an integral of changes occurring in the climate system in response to unforced climate variability as well as natural and anthropogenic forcing factors. Its temporal evolution allows detecting changes (e.g., acceleration) in one or more components. Study of the sea level budget provides constraints on missing or poorly known contributions, such as the unsurveyed deep ocean or the still uncertain land water component. In the context of the World Climate Research Programme Grand Challenge entitled “Regional Sea Level and Coastal Impacts”, an international effort involving the sea level community worldwide has been recently initiated with the objective of assessing the various data sets used to estimate components of the sea level budget during the altimetry era (1993 to present). These data sets are based on the combination of a broad range of space-based and in situ observations, model estimates and algorithms. Evaluating their quality, quantifying uncertainties and identifying sources of discrepancies between component estimates is extremely useful for various applications in climate research. This effort involves several tens of scientists from about sixty research teams/institutions worldwide (www.wcrp-climate.org/grand-challenges/gc-sea-level). The results presented in this paper are a synthesis of the first assessment performed during 2017-2018. We present estimates of the altimetry-based global mean sea level (average rate of 3.1 +/- 0.3 mm/yr and acceleration of 0.1 mm/yr2 over 1993-present), as well as of the different components of the sea level budget. We further examine closure of the sea level budget, comparing the observed global mean sea level with the sum of components. Ocean thermal expansion, glaciers, Greenland and Antarctica contribute by 42%, 21%, 15% and 8% to the global mean sea level over the 1993-present. We also study the sea level budget over 2005-present, using GRACE-based ocean mass estimates instead of sum of individual mass components. Results show closure of the sea level budget within 0.3 mm/yr. Substantial uncertainty remains for the land water storage component, as shown in examining individual mass contributions to sea level. |
format |
Dataset |
author |
Cazenave, Anny Meyssignac, Benoit Palanisamy, Hindumathi |
author_facet |
Cazenave, Anny Meyssignac, Benoit Palanisamy, Hindumathi |
author_sort |
Cazenave, Anny |
title |
Global Sea Level Budget Assessment by World Climate Research Programme |
title_short |
Global Sea Level Budget Assessment by World Climate Research Programme |
title_full |
Global Sea Level Budget Assessment by World Climate Research Programme |
title_fullStr |
Global Sea Level Budget Assessment by World Climate Research Programme |
title_full_unstemmed |
Global Sea Level Budget Assessment by World Climate Research Programme |
title_sort |
global sea level budget assessment by world climate research programme |
publisher |
SEANOE |
publishDate |
2018 |
url |
https://doi.org/10.17882/54854 |
op_coverage |
North 90.0, South -90.0, East 180.0, West -180.0 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland |
genre_facet |
Antarc* Antarctica Greenland |
op_relation |
doi:10.17882/54854 http://dx.doi.org/10.17882/54854 |
op_rights |
CC-BY |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.17882/54854 |
_version_ |
1766048979065241600 |