P3.4 The redistribution of heat within the Arctic atmosphere

Monday, 2 May 2011
Kennedy Room (1st Floor) (Omni Parker House )
Ron Lindsay, University of Washington, Seattle, WA; and A. Schweiger

WRF model simulations are made in which we use the sea ice thickness fields estimated by an off-line coupled ice-ocean model as a lower boundary condition. The goal is to better understand the fate within the atmosphere of the extra heat absorbed by the ocean in low ice years. How much is quickly lost to space and how much reduces ice growth rates during winter? Atmospheric heat fluxes and transports are compared for ice conditions from 2007 (the year with the minimum ice extent) and from the median ice conditions since 1979. The domain includes the entire Arctic Ocean, the grid size is 60 km, and there are 52 vertical levels. Lateral forcing is from the NCEP GFS analysis and the months of July through December are simulated in an ensemble of paired experiments, low ice versus median ice conditions.
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