In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason?
A
Sea surface temperatures are low
B
Inter-Tropical Convergence Zone seldom occurs
Correct Answer
C
Coriolis force is too weak
D
Absence of land in those regions
Explanation
The correct option is (b) because the Inter-Tropical Convergence Zone (ITCZ) seldom shifts into these regions, depriving them of the necessary low-pressure disturbances and atmospheric instability required to trigger cyclone formation. While option (a) is tempting because cold ocean currents (Benguela and Peru) do lower sea surface temperatures, the primary structural reason for the total absence of cyclogenesis is the lack of the ITCZ and high vertical wind shear. This question tests the core concept of tropical cyclogenesis and the geographical distribution of global pressure belts.
ClimatologyTropical CyclonesTropical cyclonesSouth AtlanticSouth-Eastern Pacifictropical latitudesInter-Tropical Convergence Zone (ITCZ)Coriolis forcesea surface temperatures