We are thankful to Noel Keenlyside for many useful comments on the text. This study was supported by funding from the European Union within the Arctic Ice Cover Simulation Experiment project (EVK2-CT-2000-00078 AICSEX). One of the authors (O. M. Johannessen) was supported by the Research Council of Norway, projects Marine Climate and Ecosystem in the Seasonal Ice Zone (MACESIZ) and Role of the Arctic Sea Ice–Atmosphere Processes (ROLARC).
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