The elucidation of a global environment change system on the basis of the East Antarctic Ice history

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Three distinct deglaciation phases since Pliocene for this sector of the EAIS are identified, based on rock weathering and 10Be surface exposure data at the Sor Rondane Mountains, East Antarctica, based on detailed geomorphological survey, cosmogenic exposure dating. The ice sheet was thinned by at least 535 m during the Plio-Pleistocene . This thinning is attributed to the reorganization of Southern Ocean circulation associated with the global cooling into the Pleistocene, which reduced the transport of moisture from the Southern Ocean to the interior of EAIS. The data also show since the Last Glacial Maximum the ice surface has lowered less than 50 m and probably started after ca. 14 ka. In addition, the multibeam bathymetry, multi-channel seismic reflection, and sediment coring surveys on the Conrad Rise, located in the southern Indian Ocean sector of the ACC revealthe northward shift of the ACC.