Modeling the seasonal variation of sea ice in the Labrador Sea with a coupled multicategory ice model and the Princeton ocean model

摘要: We use a multicategory sea ice model coupled to the Princeton ocean model, which is driven by monthly climatological atmospheric forcing, study seasonal variation of cover in Labrador Sea. Initial conditions are derived from gridded, objectively analyzed temperature-salinity data set that provides improved resolution gradients vicinity shelf break. The produces realistic ice. There growth over inner and melt outer slope. Over shelf, advection diffusion decrease mass; increase mass, maintains location edge. Near offshore edge rate exceed s1mp er month, heat together with lost atmosphere exceeds 500 Wm 22 . at surface compensated for an convective region. dominant source spring retreat south shortwave radiation open water fraction. Marginal zones regions dynamic interaction be- tween atmosphere, ice, ocean. In marginal zone located near Current its associated break front. Wintertime convection western Sea thought form Intermedi- ate Water (Clarke Gascard, 1983). Since bor- ders region, it important clarify pro- cesses limit extent examine salt fluxes this we investigate evolution ice-ocean model. Our objective assess capability simulating identify deficien- cies. processes extent. has been subject number studies numerical models. Most recently, Ikeda et al. (1996) cou- pled two-category (Hibler, 1979) Geo- physical Fluid Dynamics Laboratory (GFDL) (Bryan, 1969; Cox, 1984). was overall agreement cycle as well interannual variations. re- sults showed shoreward relatively warm off- shore How- ever, decayed too rapidly, partly because underestimates concentration. differences between present (1996). have imple- mented used sigma coordi- nate (Blumberg Mellor, 1987; Mel- lor, 1996) embedded turbulence closure submodel. climatology National Centers Environmen- tal Prediction (NCEP)/National Center Atmospheric Re-