GLACIER OXYGEN-18 CONTENT AND PLEISTOCENE OCEAN TEMPERATURES

被引：169

作者：

DANSGAARD, W

TAUBER, H

机构：

[1] H. C. Ørsted Institute, University of Copenhagen, Copenhagen

[2] Carbon-14 Dating Laboratory, National Museum

来源：

SCIENCE | 1969年 / 166卷 / 3904期

关键词：

D O I：

10.1126/science.166.3904.499

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The mean oxygen-18 content of continental ice sheets during the last glacial maximum is estimated to δO18 = -30 per mille or less, and the consequent change in the isotopic composition of the oceans at that time to 1.2 per mille or more. This means that at least 70 percent of the oxygen-18 variations found in shells of planktonic foraminifera from deep-sea cores between times of glacial maximums and minimums are due to isotopic changes in ocean water, and at most 30 percent to changes in ocean surface temperature. Hence, Emiliani's paleotemperature" curve rather depicts the amount of ice on the continents in excess of that present today. In this sense it may be renamed a "paleoglaciation" curve."

引用

页码：499 / +

页数：1

共 26 条

[1] STANDARD FOR REPORTING CONCENTRATIONS OF DEUTERIUM AND OXYGEN-18 IN NATURAL WATERS [J].