期刊
GEOPHYSICAL RESEARCH LETTERS
卷 33, 期 22, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2006GL028062
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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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