Influence of northern hemisphere general circulation on drought in northeast Brazil

Jerome Namias

doi:10.3402/tellusa.v24i4.10648

Influence of northern hemisphere general circulation on drought in northeast Brazil

Tellus

Volume 24 (1972): Issue 4

By: Jerome Namias

Open Access

|Jan 1972

Abstract

Evidence is presented to show that the highly variable interannual rainfall over Northeast Brazil is dependent on the degree of cyclonic activity or blocking in the Newfoundland-Greenland area during the Northern Hemisphere winter and spring. The linkage is traced through variations in the subtropical Atlantic anticyclone, the northeast trades and the responding Hadley cell which is forced to vary in position and strength. Intense blocking over North America and the North Atlantic is usually associated with devastating drought over Northeast Brazil.

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