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Influence of the Antarctic Ice Sheet on southern high latitude climate during the Cenozoic: Albedo vs topography effect
Author(s) -
Ogura Tomo'o,
AbeOuchi Ayako
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011366
Subject(s) - ice sheet , antarctic ice sheet , albedo (alchemy) , geology , climatology , cryosphere , ice sheet model , atmospheric sciences , sea ice , sea ice thickness , atmosphere (unit) , latitude , greenland ice sheet , environmental science , antarctic sea ice , oceanography , meteorology , geography , art , geodesy , performance art , art history
Sensitivity of high latitude temperature distribution to the variation of the Antarctic ice sheet is investigated using an atmospheric general circulation model coupled with a mixed layer ocean. Results suggest that cooling effect of the ice sheet is not negligible compared to the effect of atmospheric CO 2 decrease such as during the Cenozoic. Cooling effect of high surface albedo of the ice sheet is enhanced over the ice sheet and slightly suppressed over the circumpolar ocean by the high topography of the ice sheet. High surface albedo and high topography of the ice sheet each causes increase and decrease of southward atmospheric heat transport respectively, whose contribution to maintaining the heat balance anomaly of atmosphere‐ocean system is comparable to that of local adjustment of radiation balance.