Explanation:

The most proximate reasons for the lack of activity 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.

Ideal conditions for intensification of tropical storms are Large sea surface with temperature higher than 27° C;  Presence of the Coriolis force;   Small variations in the vertical wind speed;   A preexisting weak- low-pressure area or low-level cyclonic circulation;  Upper divergence above the sea level system. These condition are available in tropical oceans which leads to Tropical cyclones.