A) Sea surface temperatures are low
B) Inter-Tropical Convergence Zone seldom occurs
C) Coriolis force is too weak
D) Absence of land in those regions
Correct Answer: A
Solution :
Exp. [a] The most proximate reasons for the lack of cyclone formation in the South Atlantic are sea surface temperatures that tend to run a shade cooler than ideal for tropical cyclone formation even in the Southern summer, climatologically high values of vertical wind shear across that basin throughout the year, and a lack of pre-existing centers of rotation (vorticity) in that area. This last point is due both to the absence of tropical waves similar to those generated over West Africa in the Northern hemisphere and to the fact that the Inter Tropical Convergence Zone (ITCZ), which shifts towards the North in our summer and towards the South in the Southern summer, usually stays at or North of the Equator. The Eastern South Pacific is just about as void of activity as the South Atlantic, due largely to the ITCZ also having a tendency to stay near or North of the Equator, and to climatologically cool sea surface temperatures.
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