The Global Climate for June to August 1990: Drought Returns to Sub-Saharan West Africa and Warm Southern Oscillation Episode Conditions Develop in the Central Pacific

The general monsoon circulation evolved in a relatively normal fashion over most of the globe during June-August 1990. Nonetheless, dry conditions returned to sub-Saharan West Africa (10 degree -20 degree N). After two years of near-average rainfall, relative to the last 50 years, this region experi...

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Bibliographic Details
Published in:Journal of climate 1993-11, Vol.6 (11), p.2188-2212
Main Authors: Ropelewski, Chester F., Lamb, Peter J., Portis, Diane H.
Format: Article
Language:English
Subjects:
Brackish
Climate
Climatology. Bioclimatology. Climate change
Drought
Earth, ocean, space
Exact sciences and technology
External geophysics
Freshwater
Marine
Meteorology
Northern hemisphere
Precipitation
Rain
Rainy seasons
SEASONAL CLIMATE SUMMARY
Seasons
Southern oscillation
Surface temperature
Tropical climates
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Summary:The general monsoon circulation evolved in a relatively normal fashion over most of the globe during June-August 1990. Nonetheless, dry conditions returned to sub-Saharan West Africa (10 degree -20 degree N). After two years of near-average rainfall, relative to the last 50 years, this region experienced its second driest April-October since the record drought years of 1983-84. This was the eighth driest April-October period in at least the past half-century. The remainder of the Northern Hemisphere summer monsoon regions experienced mixed seasons, with the Indian summer monsoon rainfall appearing to be about normal overall. The summer monsoon season in China started with excessive rainfall amounts, but closed dry in southern areas. Dry conditions also prevailed in the southeastern United States and over most of western Europe.
ISSN:0894-8755
1520-0442
DOI:10.1175/1520-0442(1993)006<2188:TGCFJT>2.0.CO;2