Premium
Greenland Ice Sheet Contribution to 21st Century Sea Level Rise as Simulated by the Coupled CESM2.1‐CISM2.1
Author(s) -
Muntjewerf Laura,
Petrini Michele,
Vizcaino Miren,
Ernani da Silva Carolina,
Sellevold Raymond,
Scherrenberg Meike D. W.,
ThayerCalder Katherine,
Bradley Sarah L.,
Lenaerts Jan T. M.,
Lipscomb William H.,
Lofverstrom Marcus
Publication year - 2020
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl086836
Subject(s) - greenland ice sheet , future sea level , ice sheet , glacier mass balance , geology , glacier , sea level , sea level rise , climatology , cryosphere , ice sheet model , drainage basin , physical geography , climate change , ice stream , oceanography , geomorphology , sea ice , geography , cartography
The Greenland Ice Sheet (GrIS) mass balance is examined with an Earth system/ice sheet model that interactively couples the GrIS to the broader Earth system. The simulation runs from 1850 to 2100, with historical and SSP5‐8.5 forcing. By the mid‐21st century, the cumulative GrIS contribution to global mean sea level rise (SLR) is 23 mm. During the second half of the 21st century, the surface mass balance becomes negative in all drainage basins, with an additional SLR contribution of 86 mm. The annual mean GrIS mass loss in the last two decades is 2.7‐mm sea level equivalent (SLE) year −1 . The increased SLR contribution from the surface mass balance (3.1 mm SLE year −1 ) is partly offset by reduced ice discharge from thinning and retreat of outlet glaciers. The southern GrIS drainage basins contribute 73% of the mass loss in mid‐century but 55% by 2100, as surface runoff increases in the northern basins.