Record of Little Ice Age sea surface temperatures at Bermuda using a growth-dependent calibration of coral Sr/Ca
Record of Little Ice Age sea surface temperatures at Bermuda using a growth-dependent calibration of coral Sr/Ca
| dc.contributor.author | Goodkin, Nathalie F. | |
| dc.contributor.author | Hughen, Konrad A. | |
| dc.contributor.author | Cohen, Anne L. | |
| dc.contributor.author | Smith, Struan R. | |
| dc.date.accessioned | 2010-05-12T15:40:14Z | |
| dc.date.available | 2010-05-12T15:40:14Z | |
| dc.date.issued | 2005-11-30 | |
| dc.description | Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 20 (2005): PA4016, doi:10.1029/2005PA001140. | en_US |
| dc.description.abstract | Strontium to calcium ratios (Sr/Ca) are reported for a massive brain coral Diploria labyrinthiformis collected from the south shore of Bermuda and are strongly correlated with both sea surface temperature (SST) and mean annual skeletal growth rate. High Sr/Ca ratios correspond with cold SSTs and slow skeletal growth rate and vice versa. We provide a quantitative calibration of Sr/Ca to extension rate and SST along the axis of maximum growth and derive a growth-dependent Sr/Ca–SST calibration equation to reconstruct western subtropical North Atlantic SSTs for the past 223 years. When the influence of growth rate is excluded from the calibration, Sr/Ca ratios yield SSTs that are too cold during cool anomalies and too warm during warm anomalies. Toward the end of the Little Ice Age (∼1850), SST changes derived using a calibration that is not growth-dependent are exaggerated by a factor of 2 relative to those from the growth-corrected model that yields SSTs ∼1.5°C cooler than today. Our results indicate that incorporation of growth rate effects into coral Sr/Ca calibrations may improve the accuracy of SSTs derived from living and fossil corals. | en_US |
| dc.description.sponsorship | A Stanley Watson Foundation Fellowship (N.F.G.), and grants from NSF (OCE-0402728) and WHOI (K.A.H., A.L.C., and M.S.M.) supported this work. | en_US |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | Paleoceanography 20 (2005): PA4016 | en_US |
| dc.identifier.doi | 10.1029/2005PA001140 | |
| dc.identifier.uri | https://hdl.handle.net/1912/3439 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | American Geophysical Union | en_US |
| dc.relation.uri | https://doi.org/10.1029/2005PA001140 | |
| dc.subject | SST | en_US |
| dc.subject | Coral Sr/Ca | en_US |
| dc.subject | Growth rate | en_US |
| dc.title | Record of Little Ice Age sea surface temperatures at Bermuda using a growth-dependent calibration of coral Sr/Ca | en_US |
| dc.type | Article | en_US |
| dspace.entity.type | Publication | |
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