Ice sheets on the move: How north and south poles connect: Changes in the Antarctic ice sheet were driven by the melting ice sheets in the Northern Hemisphere

ScienceDaily | Nov 25, 2020 at 8:02 PM
  • As the climate cooled, during the last Ice Age, water became locked up in land ice in the Northern Hemisphere leading to dropping sea levels in Antarctica and consequent growth of the ice sheet.
  • As the climate warmed, on the other hand, as it did through the period of deglaciation, the retreating ice in the Northern Hemisphere led to rising water levels around Antarctica.
  • In order to investigate the mechanisms involved in driving changes in the Antarctic ice sheet over geologic time scales, the study draws on numerical modeling and a wide range of geological records, from cores of sediment from the ocean bottom near Antarctica to records of land exposure and past shorelines.