Multiple Choice Questions

Which of the following are the reasons for the more number of tropical cyclones in the Bay of Bengal...........

Geography and Environment (HAS) World climates

Which of the following are the reasons for the more number of tropical cyclones in the Bay of Bengal as compared to the Arabian sea?

1. The surface area of the Bay of Bengal is smaller than that of Arabian sea.

2. The Bay of Bengal is warmer than Arabian sea.

3. The Somalian water current mitigates the surface temperature of the Arabian sea.

Select the correct option using the codes given below:

1 and 2 only

2 only

2 and 3 only

1, 2 and 3

Preconditions for origin of Tropical Cyclone:

Large sea surface with temperature higher than 27° C.
Presence of the Coriolis force enough to create a cyclonic vortex.
A pre-existing weak low-pressure area.
Upper divergence above the sea level system.
At a height of about 9000 meters above the surface disturbance, there must be an anticyclonic circulation.

All the above preconditions are present in the Bay of Bengal region.

Mean temperature in the months of September and October in the Bay of Bengal is about 27 degree celsius which is highly conducive to the origin of tropical cyclones.
The strong south west monsoon winds in the Arabian sea helps in cooling the surface temperature of the Arabian sea which is not favourable for the origin of a tropical cyclone.