Dust-rainfall feedbacks in the West African sahel

Publication Type  Journal Article
Year of Publication  2008
Authors  Hui, W. J.; Cook, B. I.; Ravi, S.; Fuentes, J. D.; D'Odorico, P.
Journal Title  Water Resources Research
Volume  44
Issue  5
Pages  -
Journal Date  May 14
ISBN Number  0043-1397
Accession Number  ISI:000256064300002
Key Words  optical-thickness; aerosol; climate; spectrometer

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.


303TRTimes Cited:2Cited References Count:28

URL  <Go to ISI>://000256064300002
DOI  Doi 10.1029/2008wr006885