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dc.contributor.authorSaenger, Casey P.  Concept link
dc.contributor.authorCohen, Anne L.  Concept link
dc.contributor.authorOppo, Delia W.  Concept link
dc.contributor.authorHubbard, Dennis  Concept link
dc.date.accessioned2010-05-18T14:26:24Z
dc.date.available2010-05-18T14:26:24Z
dc.date.issued2008-07-31
dc.identifier.citationPaleoceanography 23 (2008): PA3102en_US
dc.identifier.urihttps://hdl.handle.net/1912/3461
dc.descriptionAuthor Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 23 (2008): PA3102, doi:10.1029/2007PA001572.en_US
dc.description.abstractWe analyzed strontium/calcium ratios (Sr/Ca) in four colonies of the Atlantic coral genus Montastrea with growth rates ranging from 2.3 to 12.6 mm a−1. Derived Sr/Ca–sea surface temperature (SST) calibrations exhibit significant differences among the four colonies that cannot be explained by variations in SST or seawater Sr/Ca. For a single coral Sr/Ca ratio of 8.8 mmol mol−1, the four calibrations predict SSTs ranging from 24.0° to 30.9°C. We find that differences in the Sr/Ca–SST relationships are correlated systematically with the average annual extension rate (ext) of each colony such that Sr/Ca (mmol mol−1) = 11.82 (±0.13) – 0.058 (±0.004) × ext (mm a−1) – 0.092 (±0.005) × SST (°C). This observation is consistent with previous reports of a link between coral Sr/Ca and growth rate. Verification of our growth-dependent Sr/Ca–SST calibration using a coral excluded from the calibration reconstructs the mean and seasonal amplitude of the actual recorded SST to within 0.3°C. Applying a traditional, nongrowth-dependent Sr/Ca–SST calibration derived from a modern Montastrea to the Sr/Ca ratios of a conspecific coral that grew during the early Little Ice Age (LIA) (400 years B.P.) suggests that Caribbean SSTs were >5°C cooler than today. Conversely, application of our growth-dependent Sr/Ca–SST calibration to Sr/Ca ratios derived from the LIA coral indicates that SSTs during the 5-year period analyzed were within error (±1.4°C) of modern values.en_US
dc.description.sponsorshipThis work was funded by National Science Foundation (NSF) grant OCE- 0402728, the WHOI Ocean and Climate Change Institute, and an NSF Graduate Student Fellowship.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2007PA001572
dc.subjectCoralen_US
dc.subjectStrontium/calciumen_US
dc.subjectGrowth rateen_US
dc.titleInterpreting sea surface temperature from strontium/calcium ratios in Montastrea corals : link with growth rate and implications for proxy reconstructionsen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2007PA001572


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