PALEOTEMPERATURES IN THE SOUTHWESTERN UNITED-STATES DERIVED FROM NOBLE-GASES IN GROUND-WATER

被引：173

作者：

STUTE, M ^{[1
]}

SCHLOSSER, P ^{[1
]}

CLARK, JF ^{[1
]}

BROECKER, WS ^{[1
]}

机构：

[1] COLUMBIA UNIV,DEPT GEOL SCI,NEW YORK,NY 10027

来源：

SCIENCE | 1992年 / 256卷 / 5059期

关键词：

D O I：

10.1126/science.256.5059.1000

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：

A paleotemperature record based on measurements of atmospheric noble gases dissolved in ground water of the Carrizo aquifer (Texas) shows that the annual mean temperature in the southwestern United States during the last glacial maximum was about 5-degrees-C lower than the present-day value. In combination with evidence for fluctuations in mountain snow lines, this cooling indicates that the glacial lapse rate was approximately the same as it is today. In contrast, measurements on deep-sea sediments indicate that surface temperatures in the ocean basins adjacent to our study area decreased by only about 2-degrees-C. This difference between continental and oceanic records poses questions concerning our current understanding of paleoclimate and climate-controlling processes.

引用

页码：1000 / 1003

页数：4

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