Question

Eastern and Central parts of Tamil Nadu become the rain shadow region for _ _ _ _ _ season.
A. Northern Monsoon
B. Southwest Monsoon
C. Cyclonic Rainfall
D. Summer Season

Answer 1

Hint:
Rain shadow is a dry area on the leeward side where rain is not reached properly and opposite of the windward side. The Mountains range blocks the weather system of rainfall and which is the cause of shadow behind them also. Wind and moist air are packed by prevailing winds and transported into the side of dryness and moisture is observed by those rain shadow areas.

Complete answer:
The southwest monsoon occurs between the months of June, July, August and September. When the rain starts in Western Ghats, in the western part of Tamil Nadu, rainfall is recorded about 150 centimeters approximately. Hence, eastern and central parts of Tamil Nadu come under the rain shadow regions. In general, the amount of rainfall of southwest monsoon decreases to the eastwards from western areas.

Rainfall starts suddenly in the Southwest Monsoon. By first rainfall, temperature decreases significantly. The movement of violent thunder and heavy winds in this way is called disturbance of monsoon.

As these winds reach the land, their southwesterly direction is improved by the emphasis and low thermal pressure over Northwest India. The Monsoon reaches that land in the two various differ ways, such as; The Arabian Sea Branch and The Bay of Bengal.

Hence, the correct answer is option B.

Note:
The Tamil Nadu coast is situated parallel to the Bay of Bengal where the southwest monsoon paases here. Due to Southwest monsoon, Chennai receives the least rainfall in the monsoon season also. Climate gradients are varying intensities and dimensions.