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Sea surface temperature changes during May and August in the western Arabian Sea over the last 22 kyr: Implications as to shifting of the upwelling season

DRS at CSIR-National Institute of Oceanography

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Title Sea surface temperature changes during May and August in the western Arabian Sea over the last 22 kyr: Implications as to shifting of the upwelling season
 
Creator Godad, S.P.
Naidu, P.D.
Malmgren, B.A.
 
Subject surface temperature
neural network
upwelling
Indian Ocean
 
Description In the western Arabian Sea (WAS), the highest seasonal sea surface temperature (SST) difference presently occurs between May and August. In order to gain an understanding on how monsoonal upwelling modulates the SST difference between these two months, we have computed SST for the months of May and August based on census counts of planktonic foraminifers by using the artificial neural network (ANN) technique. The SST difference between May and August exhibits three distinct phases: i) a moderate SST difference in the late Holocene (0-3.5 ka) is attributable to intense upwelling during August, ii) a minimum SST difference from 4 to 12 ka is due to weak upwelling during the month of August, and iii) the highest SST difference during the last glacial interval (19 to 22 ka) with high Globigerina bulloides % could have been caused by the occurrence of a prolonged upwelling season (from May through July) and maximum difference in the incoming solar radiation between May and August. Overall, variations in the SST difference between May and August show that the timing of intense upwelling in the Western Arabian Sea over the last 22 kyr has been variable over the months of June, July and August
 
Date 2011-02-03T08:41:02Z
2011-02-03T08:41:02Z
2011
 
Type Journal Article
 
Identifier Marine Micropaleontology, vol.78(1-2); 2011; 25-29
no
http://drs.nio.org/drs/handle/2264/3784
 
Language en
 
Relation Mar_Micropaleontol_78_25.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2011] Elsevier
 
Publisher Elsevier