The interplay of dynamic and thermodynamic processes in driving the ice-edge location in the Southern Ocean

摘要: A stand-alone sea-ice model (CICE4) was used to investigate the physical processes affecting ice-edge location. Particular attention is paid relative contributions of dynamic and thermodynamic processes in advancing ice edge equatorward during growth. Results from 10 years an 11 year numerical simulation have been verified against satellite observations 1998 to 2007. The autumn advance primarily due thermodynamic processes, with significant limited regions such as 60–708 E and 310–3408 E. In the dynamically dominated regions, winds with a southerly component cause advection but also induce growth new ice, which occurs well poleward 15% iceconcentration contour where air temperature lowest. As moves into warmer water it melts, hence extending region ocean mixed layer at freezing point. This accelerates the northward progression permits soon air temperature reaches below are dominant (e.g. 340–408 E), maximum production just ice-concentration contour, thin sea prevalent. these longitude bands, melt generally absent at the ineffective advection.