Arctic Ocean sea ice response to Northern Annular Mode-like wind forcing

Physics

Scientific paper

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Oceanography: General: Arctic And Antarctic Oceanography, Oceanography: General: Climate And Interannual Variability (3309), Oceanography: Physical: Ice Mechanics And Air/Sea/Ice Exchange Processes, Oceanography: General: Numerical Modeling

Scientific paper

The response of the Arctic Ocean sea ice system to Northern Annular Mode-like wind forcing has been investigated using an ocean/sea ice general circulation model coupled to an atmospheric boundary layer model. A series of idealized experiments was performed to investigate the Arctic Ocean's response to idealized winter wind anomalies on interannual to multi-decadal time scales. The sea ice response of the model consists of a rapid change of ice movements leading to widespread variation in sea ice thickness and concentration. In most areas the response is largely independent of the forcing frequency with only a slight increase towards longer periods. Only the Greenland Sea exhibited a change in sign of sea ice concentration anomalies at about 20 years period which appears to be caused by slow adjustment of the oceanic circulation.

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