georefid:2011-089350SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1016/j.marmicro.2010.09.0062011-01-01publicationgeorefid:2011-089350doi:10.1016/j.marmicro.2010.09.006Godad, Shital P.National Institute of Oceanography, Dona Paula, IndiaauthorNaidu, Pothuri DivakarUppsala University, SwedenauthorMalmgren, Bjorn A.authorElsevier, Amsterdam, NetherlandspublisherdocumentHardcopyMarine Micropaleontology78 (1-2)25-29In 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 (0-3.5ka) is attributable to intense upwelling during August, ii) a minimum SST difference from 4 to 12ka is due to weak upwelling during the month of August, and iii) the highest SST difference during the last glacial interval (19 to 22ka) 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. Abstract Copyright (2011) Elsevier, B.V.completedQuaternary geologyArabian SeaassemblagesCenozoicForaminiferaGlobigerinaGlobigerina bulloidesGlobigerinaceaGlobigerinidaeHoloceneIndian OceanInvertebrataLeg 117marine environmentmicrofossilsmonsoonsneural networksOcean Drilling ProgramODP Site 723paleo-oceanographypaleoclimatologypaleoenvironmentpaleotemperaturePleistoceneProtistaQuaternaryRotaliinasea-surface temperatureseasonal variationsupper Pleistoceneupwellingurn:org.iodp:exp:117urnlargerWorkCitationcampaignurn:org.iodp:exp:117:site:723urnlargerWorkCitationstudyurn:org.iodp:exp:117urnlargerWorkCitationcampaignEnglishgeoscientificInformation57.363357.363418.030418.0305Includes appendix