ISSN:
1434-4483
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Summary The interannual variability of seasonal Bhalme-and-Mooley-type drought indices over the savanna belt of Nigeria is examined and a 57-year (1931–1987) drought area series has been derived using 34 stations. The area under drought conditions is obtained by considering areas which have drought indices of less than — 1.0. The interannual variability of the drought areas is large, demonstrating large variations in the seasonal rainfall over the region. Statistical tests suggest a significant long-term increasing trend in the areal extent of drought. In particular, there is a major shift towards an increase in the mean areal extent of drought between the two periods 1931–1960 and 1961–1987.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00866113
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