[en] Surface mass balance (SMB) variations of the Greenland ice sheet (GrIS) has been identified as an important contributor to contemporary and projected global mean sea level variations but their impact on the regional sea level change pattern is still poorly known. This study provides for the first time, consistent estimates (i.e. computed with the same models over the past -1900-2015- and over the future -2015-2100-) of GrIS SMB over 1900-2100 based on the output of 32 atmospheric-ocean General Circulation Models and Earth system models involved in the Climate Model Intercomparison Project phase 5 (CMIP5). It is based on a downscaling technique calibrated against the MAR regional climate model in order to calculate an ensemble of 32 Greenland SMB estimates at regional scale. Because the GrIS SMB does not respond uniformly to greenhouse gases (GHG) emissions. the southern part of the GrIS is more sensitive to climate warming. This study shows that it should be in imbalance in the 21st century sooner that the northern part. This regional variability affects significantly the associated relative sea level pattern over the entire ocean and particularly along the eastern coast of US and the northern coast of Europe. This highlights the necessity of taking into account GrIS regional SMB changes to evaluate accurately relative sea level changes in future projections.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Meyssignac, B.
Fettweis, Xavier ; Université de Liège > Département de géographie > Climatologie et Topoclimatologie
Chevrier, R.
pada, G.
Language :
English
Title :
Regional sea level changes for the 20th and the 21st century induced by the regional variability in Greenland ice sheet surface mass loss
Publication date :
2017
Journal title :
Journal of Climate
ISSN :
0894-8755
eISSN :
1520-0442
Publisher :
American Meteorological Society
Volume :
online
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
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