Intraseasonal Sea Ice Concentration Variability Over the Weddell Sea During Austral Autumn

The sea ice concentration (SIC) over the Weddell Sea displays obvious intraseasonal variability during austral autumn with a dominant frequency of 5–20 days. SIC is manifested as development anomalies from northeastern Antarctic Peninsula toward central Sea. Rossby wave train associated internal atmospheric featuring circumglobal zonal wavenumber 4 pattern induces anomalous surface winds and drifting, leading to directly. thermodynamical processes include air temperature, moisturizing lower troposphere, latent sensible heating, downwelling longwave radiation, which contribute variation local greenhouse effect Sea, thus lead variation. investigation helps understanding sea-ice-atmosphere interaction region.