Sr/Ca-Sea surface temperature calibration in the branching Caribbean coral Acropora palmata -: art. no. L03606

被引：13

作者：

Gallup, CD ^{[1
]}

Olson, DM

Edwards, RL

Gruhn, LM

Winter, A

Taylor, FW

机构：

[1] Univ Minnesota, Dept Geol Sci, Duluth, MN 55812 USA

[2] USDA, N Cent Res Stn, Forest Serv, Grand Rapids, MN 55744 USA

[3] Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455 USA

[4] Univ Puerto Rico, Dept Marine Sci, Mayaguez, PR 00680 USA

[5] Univ Texas, Inst Geophys, Austin, TX 78712 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 03期

关键词：

D O I：

10.1029/2005GL024935

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We measured Sr/Ca ratios by thermal ionization mass spectrometry in radial and axial growth of modern Caribbean Acropora palmata corals. Comparison of our results with sea surface temperature (SST) allows radial and axial Sr/Ca-SST calibrations of Sr/Ca (mmol/mol) = 11.30 - 0.07072 x SST (degrees C) and Sr/Ca ( mmol/ mol) = 11.32 - 0.06281 x SST (degrees C), respectively. Application of the calibrations to fossil Acropora palmata from the last glacial maximum in Barbados (Guilderson et al., 1994) imply - 7 degrees C cooler conditions than the present, much larger than the 1 - 1.5 degrees cooling suggested by modern analog technique foraminifera-based estimates (Trend-Staid and Prell, 2002). If the foraminifera-based estimates are correct, then the excess cooling suggested by the Barbados corals could be explained by a 5% shift in the marine Sr/Ca ratio or an addition of similar to 20% abiotic secondary aragonite.

引用

页数：4

共 28 条

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