The sea ice in the Antarctic:
Antarctic sea ice differs in many respects from its Arctic counterpart. For example, the annual cycle of its extent is much larger, there is little melt at the sea-ice surface, and the ice extent has been slightly increasing in recent years.
These differences are largely caused by the different geographical setting around the Antarctic, where the ice is not bounded by continental margins towards warmer latitudes but can instead freely expand northward. In such setup, the large annual cycle, as well as the increasing extent are readily explicable by the prevailing wind forcing, which has increased in magnitude in recent years.
Another major difference lies in the dominance of differing ice types in the Antarctic compared to the Arctic, with the wide spread occurrence of frazil ice, snow ice and platelet ice in the sea-ice pack.