Climate and vegetation history of the midcontinent from 75 to 25 ka: A speleothem record from Crevice Cave, Missouri, USA

被引：290

作者：

Dorale, JA ^{[1
]}

Edwards, RL

Ito, E

Gonzalez, LA

机构：

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

[2] Univ Iowa, Dept Geol, Iowa City, IA 52242 USA

来源：

SCIENCE | 1998年 / 282卷 / 5395期

关键词：

D O I：

10.1126/science.282.5395.1871

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：

Four Missouri stalagmites yield consistent overlapping records of oxygen and carbon isotopic changes and provide a climate and vegetation history with submillennial resolution from 75 to 25 thousand years ago (ka). The thorium-230-dated records reveal that between 75 and 55 ka, the midcontinental climate oscillated on millennial time scales between cold and warm, and vegetation alternated among forest, savanna, and prairie. Temperatures were highest and prairie vegetation peaked between 59 and 55 ka. Climate cooled and forest replaced grassland at 55 ka, when global ice sheets began to build during the early part of Marine Oxygen Isotope Stage 3.

引用

页码：1871 / 1874

页数：4

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