A dynamical link between the Arctic and the global climate system

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • K. Dethloff
  • A. Rinke
  • A. Benkel
  • M. Køltzow
  • E. Sokolova
  • S. Kumar Saha
  • D. Handorf
  • W. Dorn
  • B. Rockel
  • H. von Storch
  • J. E. Haugen
  • L. P. Røed
  • E. Roeckner
  • Christensen, Jens Hesselbjerg
  • M. Stendel

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.

TidsskriftGeophysical Research Letters
Udgave nummer3
StatusUdgivet - 16 feb. 2006

ID: 186941985