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Sensitivity of Asian and African climate to variations in seasonal insolation, glacial ice cover, sea surface temperature, and Asian orographyA general circulation model was used to investigate the sensitivity of Asian and African climate to prescribed changes in boundary conditions with the objective of identifying the relative importance of individual high-latitude glacial boundary conditions on seasonal climate and providing a physical basis for interpreting the paleoclimate record. The circulation model is described and results are presented. Insolation forcing increased summer Asian monsoon winds, while increased high-latitude ice cover strengthened winter Asian trade winds causing decreased precipitation. These factors had little effect on African climate. Cooler North Atlantic sea surface temperatures enhanced winter trade winds over North Africa, southern Asian climate was relatively unaffected. Reducing Asian orography enhanced Asian winter circulation while decreasing the summer monsoon. These model results suggest that African and southern Asian climate respond differently to separate elements of high-latitude climate variability.
Document ID
19930050692
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Demenocal, Peter B.
(Lamont-Doherty Geological Observatory Palisades, NY, United States)
Rind, David
(NASA Goddard Inst. for Space Studies New York, United States)
Date Acquired
August 16, 2013
Publication Date
April 20, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: D4
ISSN: 0148-0227
Subject Category
Meteorology And Climatology
Accession Number
93A34689
Funding Number(s)
CONTRACT_GRANT: NSF OCE-92-03936
Distribution Limits
Public
Copyright
Other

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