In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. Wha

Question

In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason?

Accepted Answer

Tropical cyclones require several specific conditions to form: warm ocean waters (at least 26.5°C down to a depth of 50 meters), high relative humidity in the lower-to-mid troposphere, low vertical wind shear, and, crucially, a pre-existing near-surface disturbance or area of convergence, typically within the Inter-Tropical Convergence Zone (ITCZ). The ITCZ is a belt of low pressure where the trade winds from the Northern and Southern Hemispheres converge, leading to rising air and cloud formation, which provides the necessary instability for cyclone development. In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, the ITCZ seldom occurs with sufficient intensity or persistence to foster tropical cyclogenesis. While sea surface temperatures can sometimes be a limiting factor, the primary reason is the lack of consistent atmospheric convergence provided by a robust ITCZ, often coupled with unfavorable wind shear patterns or other atmospheric conditions.

Answer

Sea surface temperatures are low

Answer

Inter-Tropical Convergence Zone seldom occurs

Answer

Coriolis force is too weak

Answer

Absence of land in those regions

In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason?

Explanation

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