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dc.contributor.authorNaik, S.S.
dc.contributor.authorNaidu, P.D.
dc.contributor.authorFoster, G.L.
dc.contributor.authorMartínez-Boti, M.A.
dc.date.accessioned2015-08-24T09:40:20Z
dc.date.available2015-08-24T09:40:20Z
dc.date.issued2015
dc.identifier.citationGeophysical Research Letters, vol.42(5); 2015; 1450-1458
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/4752
dc.description.abstractHere we present the first boron isotope-based pCO<sub>2</sub><sup>sw</sup> (pCO<sub>2</sub> of seawater) reconstruction from the eastern Arabian Sea using the planktic foraminifera species Globigerinoides ruber. Our results from sediment core AAS9/21 show that pCO<sub>2</sub><sup>sw</sup> varied between ~160 and 300 µatm during the last 23 kyr. The deltapCO<sub>2</sub>, the sea-air pCO<sub>2</sub> difference, is relatively small during the last glacial maximum and becomes more negative towards the Holocene, with the exception of a significant excess during the last deglaciation centered on the Bølling-Ållerød. Throughout the record, deltapCO<sub>2</sub> is predominantly negative, probably as a result of enhanced biological productivity (and higher nutrient and carbon utilization) during the southwest monsoon. A reduction in deltapCO<sub>2</sub> during the last glacial maximum is therefore consistent with a reduction in the strength of this monsoon system.
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.rightsAn edited version of this paper was published by AGU. Copyright [2015] AGU. To view the published open abstract, go to http://dx.doi.org/10.1002/2015GL063089
dc.subjectPALAEO-STUDIES
dc.subjectPALAEO-STUDIES
dc.titleTracing the strength of the southwest monsoon using boron isotopes in the eastern Arabian Sea
dc.typeJournal Article


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