Question

Q. Which of the following is/are the favourable conditions for the formation of a tropical cyclone:

Select the correct answer using the code given below:

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

Answer 1

The correct option is D 1 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 maintained at the centre