Reconstruction of deglacial sea surface temperatures in the tropical Pacific from selective analysis of a fossil coral

被引：25

作者：

Allison, N ^{[1
]}

Finch, AA

Tudhope, AW

Newville, M

Sutton, SR

Ellam, RM

机构：

[1] Univ St Andrews, Sch Geog & Geosci, St Andrews KY16 9AL, Fife, Scotland

[2] Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA

[3] Scottish Univ Environm Res Ctr, E Kilbride G75 OQF, Lanark, Scotland

[4] Univ Edinburgh, Sch Geosci, Edinburgh EH9 3JW, Midlothian, Scotland

来源：

GEOPHYSICAL RESEARCH LETTERS | 2005年 / 32卷 / 17期

基金：

英国自然环境研究理事会;

关键词：

D O I：

10.1029/2005GL023183

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Sr/Ca of coral skeletons demonstrates potential as an indicator of sea surface temperatures (SSTs). However, the glacial-interglacial SST ranges predicted from Sr/Ca of fossil corals are usually higher than from other marine proxies. We observed infilling of secondary aragonite, characterised by high Sr/Ca ratios, along intraskeletal pores of a fossil coral from Papua New Guinea that grew during the penultimate deglaciation (130 +/- 2 ka). Selective microanalysis of unaltered areas of the fossil coral indicates that SSTs at similar to 130 ka were <= 1 degrees C cooler than at present in contrast with bulk measurements ( combining infilled and unaltered areas) which indicate a difference of 6-7 degrees C. The analysis of unaltered areas of fossil skeletons by microprobe techniques may offer a route to more accurate reconstruction of past SSTs.

引用

页码：1 / 4

页数：4

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