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Journal Article

A dynamical link between the Arctic and the global climate system

MPS-Authors
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Roeckner,  Erich
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
Climate Modelling, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

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2005GL025245.pdf
(Publisher version), 666KB

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Citation

Dethloff, K., Rinke, A., Benkel, A., Koltzow, M., Sokolova, E., Kumar Saha, S., et al. (2006). A dynamical link between the Arctic and the global climate system. Geophysical Research Letters, 33(3): L03703. doi:10.1029/2005GL025245.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-FD0A-8
Abstract
By means of simulations with a global coupled AOGCM it is shown that changes in the polar energy sink region can exert a strong influence on the mid- and high-latitude climate by modulating the strength of the mid-latitude westerlies and storm tracks. It is found, that a more realistic sea-ice and snow albedo treatment changes the ice-albedo feedback and the radiative exchange between the atmosphere and the ocean-sea-ice system. The planetary wave energy fluxes in the middle troposphere of mid-latitudes between 30 and 50°N are redistributed, which induces perturbations in the zonal and meridional planetary wave trains from the tropics over the mid-latitudes into the Arctic. It is shown, that the improved parameterization of Arctic sea-ice and snow albedo can trigger changes in the Arctic and North Atlantic Oscillation pattern with strong implications for the European climate.