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Editor's Highlight
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GEOPHYSICAL RESEARCH LETTERS,
VOL. 33,
L03703,
doi:10.1029/2005GL025245,
2006
A dynamical link between the Arctic and the global climate system
K. Dethloff
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
A. Rinke
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
A. Benkel
GKSS Research Center, Institute of Coastal Research, Geesthacht, Germany
M. Køltzow
Norwegian Meteorological Institute, Oslo, Norway
E. Sokolova
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
S. Kumar Saha
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
D. Handorf
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
W. Dorn
Research Unit Potsdam, Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
B. Rockel
GKSS Research Center, Institute of Coastal Research, Geesthacht, Germany
H. von Storch
GKSS Research Center, Institute of Coastal Research, Geesthacht, Germany
J. E. Haugen
Norwegian Meteorological Institute, Oslo, Norway
L. P. Røed
Norwegian Meteorological Institute, Oslo, Norway
E. Roeckner
Max Planck Institute for Meteorology, Hamburg, Germany
J. H. Christensen
Danish Meterorological Institute, Copenhagen, Denmark
M. Stendel
Danish Meterorological Institute, Copenhagen, Denmark
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.
Received 16
November
2005;
accepted 15
December
2005;
published 1
February
2006.
Index Terms: 1616 Global Change: Climate variability (1635, 3305, 3309, 4215, 4513); 1620 Global Change: Climate dynamics (0429, 3309); 1622 Global Change: Earth system modeling (1225); 1626 Global Change: Global climate models (3337, 4928).
Read Full Article (file size: 681355 bytes) Cited by
Citation: Dethloff, K., et al.
(2006),
A dynamical link between the Arctic and the global climate system,
Geophys. Res. Lett.,
33,
L03703,
doi:10.1029/2005GL025245.
Copyright 2006 by the American Geophysical Union.
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