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Article: Arctic sea ice and freshwater changes driven by the atmospheric leading mode in a coupled sea ice-ocean model
- Article from:
- Journal of Climate
- Article date:
- July 1, 2003
- Author:
CopyrightCopyright American Meteorological Society Jul 1, 2003. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Observational and modeling studies have indicated recent large changes of sea ice and hydrographic properties in the Arctic Ocean. However, the observational database is sufficiently sparse that the mechanisms responsible for the recent changes are not fully understood. A coupled
Arctic ocean-sea ice model forced by output from the NCEP-NCAR reanalysis is employed to investigate the role that the leading atmospheric mode has played in the recent changes of the Arctic Ocean. A modified Arctic Oscillation (AO) index is derived for the region poleward of 62.5[degrees]N in order to avoid ambiguities in the distinction between the conventional AO and the North Atlantic Oscillation ...