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A dynamical link between the Arctic and the global climate system
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
GKSS Research Center, Institute of Coastal Research, Geesthacht, Germany
Norwegian Meteorological Institute, Oslo, Norway
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
GKSS Research Center, Institute of Coastal Research, Geesthacht, Germany
GKSS Research Center, Institute of Coastal Research, Geesthacht, Germany
Norwegian Meteorological Institute, Oslo, Norway
Norwegian Meteorological Institute, Oslo, Norway
Max Planck Institute for Meteorology, Hamburg, Germany
Danish Meterorological Institute, Copenhagen, Denmark
Danish Meterorological Institute, Copenhagen, Denmark
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.
Received 16 November 2005; accepted 15 December 2005; published 1 February 2006.
Citation: (2006), A dynamical link between the Arctic and the global climate system, Geophys. Res. Lett., 33, L03703, doi:10.1029/2005GL025245.
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