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dc.contributor.authorConroy, Jessica L.en_US
dc.contributor.authorThompson, Diane M.en_US
dc.contributor.authorCobb, Kim M.en_US
dc.contributor.authorNoone, Daviden_US
dc.contributor.authorRea, Solandaen_US
dc.contributor.authorLegrande, Allegra N.en_US
dc.date.accessioned2018-02-26T20:08:04Z
dc.date.available2018-02-26T20:08:04Z
dc.date.issued2017-05-01
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000403451600003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e74115fe3da270499c3d65c9b17d654
dc.identifier.citationJessica L Conroy, Diane M Thompson, Kim M Cobb, David Noone, Solanda Rea, Allegra N Legrande. 2017. "Spatiotemporal variability in the O-18-salinity relationship of seawater across the tropical Pacific Ocean." Paleoceanography, Volume 32, Issue 5, pp. 484 - 497 (14).
dc.identifier.issn0883-8305
dc.identifier.issn1944-9186
dc.identifier.urihttps://hdl.handle.net/2144/27299
dc.description.abstractThe relationship between salinity and the stable oxygen isotope ratio of seawater (δ18Osw) is of utmost importance to the quantitative reconstruction of past changes in salinity from δ18O values of marine carbonates. This relationship is often considered to be uniform across water masses, but the constancy of the δ18Osw-salinity relationship across space and time remains uncertain, as δ18Osw responds to varying atmospheric vapor sources and pathways, while salinity does not. Here we present new δ18Osw-salinity data from sites spanning the tropical Pacific Ocean. New data from Palau, Papua New Guinea, Kiritimati, and Galápagos show slopes ranging from 0.09 ‰/psu in the Galápagos to 0.32‰/psu in Palau. The slope of the δ18Osw-salinity relationship is higher in the western tropical Pacific versus the eastern tropical Pacific in observations and in two isotope-enabled climate model simulations. A comparison of δ18Osw-salinity relationships derived from short-term spatial surveys and multiyear time series at Papua New Guinea and Galápagos suggests spatial relationships can be substituted for temporal relationships at these sites, at least within the time period of the investigation. However, the δ18Osw-salinity relationship varied temporally at Palau, likely in response to water mass changes associated with interannual El Niño–Southern Oscillation (ENSO) variability, suggesting nonstationarity in this local δ18Osw-salinity relationship. Applying local δ18Osw-salinity relationships in a coral δ18O forward model shows that using a constant, basinwide δ18Osw-salinity slope can both overestimate and underestimate the contribution of δ18Osw to carbonate δ18O variance at individual sites in the western tropical Pacific.en_US
dc.description.sponsorshipWe are grateful for the dedicated water samplers who enabled this research: Lori J. Bell and Gerda Ucharm of the Coral Reef Research Foundation, Palau; Rosa Maritza Motoche Gonzalez and the Fuerza Aerea Ecuatoriana, Santa Cruz, Galapagos, Ecuador; Taonateiti Kabiri and the students of Tennessee Primary School, London, Kiritimati; and the Manus Weather Observers, U.S. Department of Energy ARM Climate Research Facility, Manus, Papua New Guinea. We would like to thank the Galapagos National Park, the Kiritimati Ministry of Environment Lands and Agricultural Development for sample permits, and the Charles Darwin Research Station for logistical support. Funding sources for this work includes NSF-AGS-PF 1049664 to J.L.C., NSF P2C2-1203785 to K.M.C., J.L.C., and D.N. This research was also supported by the Office of Biological and Environment Research of the U.S. Department of Energy as part of the Atmospheric Radiation Measurement Climate Research Facility. Isotope data are available as supporting information associated with the manuscript. (1049664 - NSF-AGS-PF; P2C2-1203785 - NSF; Office of Biological and Environment Research of the U.S. Department of Energy as part of the Atmospheric Radiation Measurement Climate Research Facility)en_US
dc.format.extent484 - 497 (14)en_US
dc.languageEnglish
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.ispartofPaleoceanography
dc.rights©2017. American Geophysical Union. All Rights Reserved.en_US
dc.subjectScience & technologyen_US
dc.subjectPhysical sciencesen_US
dc.subjectLife sciences & biomedicineen_US
dc.subjectGeosciencesen_US
dc.subjectOceanographyen_US
dc.subjectPaleontologyen_US
dc.subjectGeologyen_US
dc.subjectTropical Pacificen_US
dc.subjectPaleoclimateen_US
dc.subjectSeawateren_US
dc.subjectStable oxygen isotopeen_US
dc.subjectSalinityen_US
dc.subjectSea surface temperatureen_US
dc.subjectLast glacial maximumen_US
dc.subjectCoralsen_US
dc.subjectDelta-O-18en_US
dc.subjectHoloceneen_US
dc.subjectGeochemistryen_US
dc.subjectEcologyen_US
dc.subjectPaleontologyen_US
dc.subjectPacific Oceanen_US
dc.titleSpatiotemporal variability in the O-18-salinity relationship of seawater across the tropical Pacific Oceanen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/2016PA003073
pubs.elements-sourceweb-of-scienceen_US
pubs.notesEmbargo: Not knownen_US
pubs.organisational-groupBoston Universityen_US
pubs.organisational-groupBoston University, College of Arts & Sciencesen_US
pubs.organisational-groupBoston University, College of Arts & Sciences, Department of Earth & Environmenten_US
pubs.publication-statusPublisheden_US
dc.identifier.orcid0000-0002-6181-1259 (Thompson, Diane M)


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