Dust-rainfall feedbacks in the West African Sahel

Wanching Jacquie Hui, Benjamin I. Cook, Sujith Ravi, José D. Fuentes, Paolo D'Odorico

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article numberW05202
JournalWater Resources Research
Volume44
Issue number5
DOIs
StatePublished - May 2008

All Science Journal Classification (ASJC) codes

  • Water Science and Technology

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