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Sensitivity of Northern Hemispheric continental ice sheets to tropical SST during deglaciation
IPSL/LSCE, Gif sur Yvette, France
IPSL/LSCE, Gif sur Yvette, France
IPSL/LSCE, Gif sur Yvette, France
IPSL/LSCE, Gif sur Yvette, France
IPSL/LSCE, Gif sur Yvette, France
LGGE, Saint-Martin d'Heres, France
NOAA-CIRES Climate Diagnostics Center, Boulder, Colorado, USA
Department of Geosciences, Bremen University, Bremen, Germany
Max Planck Institute for Meteorology, M&D group, Hamburg, Germany
Lamont Doherty Earth Observatory of Columbia University, Palisades, New York, USA
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.
Received 9 August 2003; accepted 21 November 2003; published 23 January 2004.
Citation: (2004), Sensitivity of Northern Hemispheric continental ice sheets to tropical SST during deglaciation, Geophys. Res. Lett., 31, L02206, doi:10.1029/2003GL018375.
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