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contributor authorNicholson, Sharon E.
date accessioned2017-06-09T16:03:37Z
date available2017-06-09T16:03:37Z
date copyright1981/10/01
date issued1981
identifier issn0027-0644
identifier otherams-59972.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4200589
description abstractThe semiarid regions of Africa experienced a number of extreme rainfall fluctuations in the present century, most notable of which are the ?wet? 1950's and the drought 1968?75. Thirty-seven century-long regional rainfall departure series evidence the continental scale and marked coherence of these anomalies and illustrate important climatic teleconnections. A comparison of sub-Saharan droughts and wetter years suggests that a northward displacement of the Intertropical Convergence Zone (ITCZ) may account for wetter years, but that a weakened ?intensity? of the rainy season, independent of ITCZ position, is the most likely cause of drought in the sub-Saharan region. This and the tendency for synchronous fluctuations north and south of the Sahara (i.e., tropical and extratropical regimes) suggest that changes in intensity of the Hadley circulation may be an important factor in West Africa rainfall fluctuations.
publisherAmerican Meteorological Society
titleRainfall and Atmospheric Circulation during Drought Periods and Wetter Years in West Africa
typeJournal Paper
journal volume109
journal issue10
journal titleMonthly Weather Review
identifier doi10.1175/1520-0493(1981)109<2191:RAACDD>2.0.CO;2
journal fristpage2191
journal lastpage2208
treeMonthly Weather Review:;1981:;volume( 109 ):;issue: 010
contenttypeFulltext


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