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A Quantitative Assessment of the Arabian Sea Sediment Record Using GCM Simulated Upwelling

Published online by Cambridge University Press:  20 January 2017

Grant R. Bigg ,
Dongxiang Jiang  and
John F. B. Mitchell
Grant R. Bigg
Affiliation:
School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
Dongxiang Jiang
Affiliation:
School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
John F. B. Mitchell
Affiliation:
Meteorological Office, London Road, Bracknell Berks RG12 2SZ, United Kingdom
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Abstract

A general circulation model (GCM) of the ocean is used to study the effects of changes in the monsoon winds of present day and 9000 yr B.P. on the upwelling in the Arabian Sea. The vertical transport from the ocean GCM is used as a measure of upwelling strength to assess the relative abundance of Globigerina bulloides at present and 9000 yr B.P., during the climatic optimum. The high abundance of G. bulloides at 9000 yr B.P. is probably a result of a doubling of the vertical transport at that time.

Type
Research Article
Information
Quaternary Research , Volume 35 , Issue 3-Part1 , May 1991 , pp. 464 - 468
Copyright
University of Washington

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