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A first look at past sea surface temperatures in the equatorial Indian Ocean from Mg/Ca in foraminifera

DRS at CSIR-National Institute of Oceanography

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Title A first look at past sea surface temperatures in the equatorial Indian Ocean from Mg/Ca in foraminifera
 
Creator Saraswat, R.
Nigam, R.
Weldeab, S.
Mackensen, A.
Naidu, P.D.
 
Subject surface temperature
foraminifera
palaeo studies
indicators
palaeoclimatology
magnesium isotopes
calcium isotopes
radiocarbon dating
 
Description Sea surface temperature (SST) for the central equatorial Indian Ocean, has been reconstructed over the last approx. 137 kyr, from Mg/Ca of the planktonic foraminiferal species Globigerinoides ruber. According to our record the equatorial Indian Ocean SST was approx. 2.1 degrees C colder during the last glacial maximum as compared to present times. The data further shows that the surface equatorial Indian Ocean was comparatively warmer during isotopic stage 5e than at present (approx. 29.9 vs approx. 28.5 degrees C). Comparison of the equatorial Indian Ocean SST with the Antarctic delta D and Greenland delta sup(18) O records, shows that the major high-latitude cooling/warming events are also present in the equatorial Indian Ocean SST variation record. Similarity between the equatorial Indian Ocean SST and the equatorial Pacific SST suggests the possibility of a common mechanism controlling the SSTs in both the equatorial Indian Ocean and the Pacific Ocean
 
Date 2008-02-22T05:30:09Z
2008-02-22T05:30:09Z
2005
 
Type Journal Article
 
Identifier Geophysical research letters, Vol.32; doi:10.1029/2005GL024093, 4 ppp.
http://drs.nio.org/drs/handle/2264/931
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher AGU