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Sensitivity of Northern Hemispheric continental ice sheets to tropical SST during deglaciation
Author(s) -
Rodgers Keith B.,
Charbit Sylvie,
Kageyama Masa,
Philippon Gwenaëlle,
Ramstein Gilles,
Ritz Catherine,
Yin Jeffrey H.,
Lohmann Gerrit,
Lorenz Stephan J.,
Khodri Myriam
Publication year - 2004
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 - 10.1029/2003gl018375
Subject(s) - deglaciation , ice sheet , climatology , sea surface temperature , geology , precipitation , atmospheric sciences , ice sheet model , environmental science , sea ice , oceanography , cryosphere , ice stream , meteorology , holocene , physics
A thermomechanical ice sheet model (ISM) is used to investigate the sensitivity of the Laurentide and Fennoscandian ice sheets to tropical sea surface temperature (SST) perturbations during deglaciation. The ISM is driven by surface temperature and precipitation fields from three different atmospheric general circulation models (AGCMs). For each AGCM, the responses in temperature and precipitation over the ice sheets nearly compensate, such that ice sheet mass balance is not strongly sensitive to tropical SST boundary conditions. It was also found that there is significant variation in the response of the ISM to the different AGCM output fields.