Question

Q. Consider the following conditions:

Which of the conditions given above are favourable for the formation and intensification of tropical cyclones?

• A. 1 and 2 only
• B. 3 and 4 only
• C. 1, 2 and 3 only
• D. 1 and 4 only

Answer 1

The correct option is C 1, 2 and 3 only

Explanation:

The conditions favourable for the formation and intensification of tropical storms are:

1. Large sea surface with a temperature higher than 27° C.
2. Presence of the Coriolis force.
3. Small variations in the vertical wind speed: (strong vertical wind shear inhibits convective cyclone formation).
4. A pre-existing weak low-pressure area or low-level cyclonic circulation.
5. Upper divergence above the sea level system: A well-developed divergence in the upper atmosphere is required so that the rising air currents within the cyclone continue to be pumped out and the low pressure is maintained at the centre.