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A Numerical Ice-Stream Model: Application to Holocene Retreat in the Ross Sea, West Antarctica (Abstract)

A numerical model of ice-stream retreat during the Holocene period of rising sea-level has been constructed, and applied to one of the ice streams draining the Ross Sea sector of the West Antarctic ice sheet. The purpose of the experiment is to assess the relative significance of eustatic sea-level rise, the response of the solid Earth to the changing ice load, and the formation of the Ross Ice Shelf on retreat of the ice-stream grounding line to its present position in the Ross embayment. An underlying hypothesis is that marine ice sheets (such as that in West Antarctica), the ocean, and the solid Earth form a coupled dynamic system in which changes, once initiated by an external event such as rising sea-level, can proceed independently of climatic change. Ice stream E (see maps by Rose 1979) was used as a test case during development of the model.