Seawater isotope constraints on tropical hydrology during the Holocene


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dc.contributor.author Oppo, Delia W.
dc.contributor.author Schmidt, Gavin A.
dc.contributor.author LeGrande, Allegra N.
dc.date.accessioned 2010-04-28T15:50:59Z
dc.date.available 2010-04-28T15:50:59Z
dc.date.issued 2007-07-03
dc.identifier.citation Geophysical Research Letters 34 (2007): L13701 en_US
dc.identifier.uri http://hdl.handle.net/1912/3344
dc.description Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 34 (2007): L13701, doi:10.1029/2007GL030017. en_US
dc.description.abstract Paleoceanographic data from the low latitude Pacific Ocean provides evidence of changes in the freshwater budget and redistribution of freshwater within the basin during the Holocene. Reconstructed Holocene seawater δ 18O changes compare favorably to differences predicted between climate simulations for the middle Holocene (MH) and for the pre-Industrial late Holocene (LH). The model simulations demonstrate that changes in the tropical hydrologic cycle affect the relationship between δ 18Osw and surface salinity, and allow, for the first time, quantitative estimates of western Pacific salinity change during the Holocene. The simulations suggest that during the MH, the mean salinity of the Pacific was higher because less water vapor was transported from the Atlantic Ocean and more was transported to the Indian Ocean. The salinity of the western Pacific was enhanced further due both to the greater advection of salt to the region by ocean currents and to an increase in continental precipitation at the expense of maritime precipitation, the latter a consequence of the stronger Asian summer monsoon. en_US
dc.description.sponsorship This work was supported by NSF grants ATM-0501241, ATM-0501351, and WHOI’s Ocean and Climate Change Institute. en_US
dc.format.mimetype text/plain
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2007GL030017
dc.subject Holocene en_US
dc.subject Tropical Pacific en_US
dc.subject Hydrology en_US
dc.subject Paleoceanography en_US
dc.subject Geochemical tracers en_US
dc.subject Insolation forcing en_US
dc.title Seawater isotope constraints on tropical hydrology during the Holocene en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2007GL030017

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