Meta-analysis of tropical surface temperatures during the Last Glacial Maximum

被引：50
|
作者：
Ballantyne, AP
Lavine, M
Crowley, TJ
Liu, J
Baker, PB
机构：
[1] Duke Univ, Nicholas Sch Environm & Earth Sci, Durham, NC 27708 USA
[2] Duke Univ, Inst Stat & Decis Sci, Durham, NC 27706 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2005年 / 32卷 / 05期
关键词：
D O I：
10.1029/2004GL021217
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The magnitude of tropical cooling during the Last Glacial Maximum (LGM) has been the subject of uncertainty for over 25 years. We use principles of meta-analysis as an objective approach to reconcile estimates from different proxies. This approach treats each observation as a random estimate of the true mean and weights estimates by their reported precision. We assigned global uncertainties to proxies and derived a new regional standard deviation for temperatures calculated from the Sr/Ca ratio in tropical corals (sigma = 1.4 degrees C). Using a Bayesian spatial interpolation scheme, we estimate a mean cooling of LGM tropical sea surface temperatures of -2.7 +/- 0.5 degrees C (+/-sigma) and surface air temperatures of -5.4 +/- 0.3 degrees C (+/-sigma).
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页码：1 / 4
页数：4
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