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Effect of ice sheet interactions in anthropogenic climate change simulations

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Mikolajewicz,  U.
Ocean Physics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Vizcaino,  M.
IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society;

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Jungclaus,  J.       
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Schurgers,  G.
Ocean Physics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society;

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2007GL031173.pdf
(Publisher version), 522KB

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Citation

Mikolajewicz, U., Vizcaino, M., Jungclaus, J., & Schurgers, G. (2007). Effect of ice sheet interactions in anthropogenic climate change simulations. Geophysical Research Letters, 34: L18706. doi:10.1029/2007GL031173.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-FAB3-2
Abstract
We investigate the effect of ice sheets on climate change under elevated atmospheric CO2 concentrations with an atmosphere ocean general circulation model ( AOGCM) coupled to a thermomechanical ice sheet model and a vegetation model. The effect of increased meltwater fluxes from ice sheets turned out to be negligible in the phase of initial weakening of the North Atlantic meridional overturning circulation ( AMOC), and more important during the recovery in subsequent centuries. Lower surface height of the Greenland ice sheet ( GRIS) leads locally to a warming, especially in winter, and remotely to a cooling over northern Eurasia due to modified atmospheric circulation. With quadrupling of the atmospheric CO2 concentration the entire GRIS is exposed to surface melt in summer. On formerly ice-covered grid points climate locally warms strongly via increased albedos, with positive feedbacks due to boreal forest expansion.