Simulation of the Holocene climate evolution in Northern Africa: The termination of the African Humid Period

被引：105

作者：

Renssen, H.

Brovkin, V.

Fichefet, T.

Goosse, H.

机构：

[1] Vrije Univ Amsterdam, Fac Earth & Life Sci, NL-1081 HV Amsterdam, Netherlands

[2] Potsdam Inst Klimafolgenforsch, D-14412 Potsdam, Germany

[3] Catholic Univ Louvain, Inst Astron & Geophys Georges Lemaitre, B-1348 Louvain, Belgium

来源：

QUATERNARY INTERNATIONAL | 2006年 / 150卷

关键词：

D O I：

10.1016/j.quaint.2005.01.001

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

The Holocene climate evolution in Northern Africa is studied in a 9000-yr-long transient simulation with a coupled atmosphere-ocean-vegetation model forced by changes in insolation and atmospheric greenhouse gas concentrations. The model simulates in the monsoonal domains a significant decrease in precipitation under influence of the orbitally forced reduction in summer insolation. In the Western Sahara region, the simulated mid-Holocene transition from humid to arid conditions (the termination of the African Humid Period) is highly non-linear with the occurrence of centennial-scale climate fluctuations due to the biogeophysical feedback between precipitation and vegetation cover. This result is in agreement with proxy data from the Western Sahara region. The other monsoonal regions experience a more gradual climate evolution that linearly follows the insolation forcing, which appears in disagreement with available lake level records. (c) 2006 Elsevier Ltd and INQUA. All rights reserved.

引用

页码：95 / 102

页数：8

共 33 条

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