On the cause of abrupt vegetation collapse in North Africa during the Holocene: Climate variability vs. vegetation feedback

被引：75

作者：

Liu, Zhengyu

Wang, Yi

Gallimore, Robert

Notaro, Michael

Prentice, I. Colin

机构：

[1] Univ Wisconsin, Ctr Climat Res, Madison, WI 53706 USA

[2] Univ Bristol, Dept Earth Sci, Bristol BS8 1RJ, Avon, England

[3] Chinese Acad Sci, Earth Environm Inst, Beijing, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 22期

关键词：

D O I：

10.1029/2006GL028062

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The abrupt desertification over the northern Africa in the mid-Holocene is studied in both a complex and a simple coupled climate-vegetation model. In contrast to the previous mechanism that relies on strong positive vegetation-climate feedback and the resulted multiple equilibria, we propose a new mechanism in which the abrupt desertification is caused by low frequency climate variability, rather than a positive vegetation-climate feedback. The implication of this new mechanism to modelling and observation is also discussed.

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