Dust-rainfall feedbacks in the West African sahel

被引：41

作者：

Hui, Wanching Jacquie ^{[1
]}

Cook, Benjamin I. ^{[2
]}

Ravi, Sujith ^{[1
]}

Fuentes, Jose D. ^{[1
]}

D'Odorico, Paolo ^{[1
]}

机构：

[1] Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA

[2] NASA, Goddard Inst Space Studies, New York, NY 10025 USA

来源：

WATER RESOURCES RESEARCH | 2008年 / 44卷 / 05期

关键词：

D O I：

10.1029/2008WR006885

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Dust aerosols can suppress rainfall by increasing the number of cloud condensation nuclei in warm clouds and affecting the surface radiation budget and boundary layer instability. The extent to which atmospheric dust may affect precipitation yields and the hydrologic cycle in semiarid regions remains poorly understood. We investigate the relationship between dust aerosols and rainfall in the West African Sahel where the dust-rainfall feedback has been speculated to contribute to sustained droughts. We find that the amount of dust loadings is negatively correlated with rainfall values, suggesting that dust entrained in the atmosphere can significantly inhibit rainfall in this region.

引用

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