Coupled thermal and hydrological evolution of tropical Africa over the last deglaciation

被引：255

作者：

Weijers, Johan W. H.

Schefuss, Enno

Schouten, Stefan

Damste, Jaap S. Sinninghe

机构：

[1] Netherlands Inst Sea Res, Dept Marine Biogeochem & Toxicol, NL-1790 AB Den Burg, Texel, Netherlands

[2] Deutsch Forschungsgemeinschat Res Ctr Ocean Margi, D-28359 Bremen, Germany

来源：

SCIENCE | 2007年 / 315卷 / 5819期

关键词：

D O I：

10.1126/science.1138131

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：

We analyzed the distribution of branched tetraether membrane lipids derived from soil bacteria in a marine sediment record that was recovered close to the Congo River outflow, and the results enabled us to reconstruct large-scale continental temperature changes in tropical Africa that span the past 25,000 years. Tropical African temperatures gradually increased from similar to 21 degrees to 25 degrees C over the last deglaciation, which is a larger warming than estimated for the tropical Atlantic Ocean. A direct comparison with sea-surface temperature estimates from the same core revealed that the land-sea temperature difference was, through the thermal pressure gradient, an important control on central African precipitation patterns.

引用

页码：1701 / 1704

页数：4

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