Give two reasons why Arabian
Sea branch of the South West
Monsoon
does not shed any moisture in Western
Rajasthan
Answers
The Arabian sea branch of monsoon goes parallel to the Aravalli range, which prevents any of the monsoon winds to reach the western part of Rajasthan. The windward side i.e the eastern side of the Aravalli range in western Rajasthan, gets the rainfall from the Arabian sea branch of South West Monsoon and most of the moisture is shed there, whereas the leeward side i.e the western side of Aravalli range does not get any rain from it. This also adds to the reason behind the formation of the Thar desert.
Arabian Sea branch gives very little rainfall to Rajasthan due to two reasons-
> The average alignmentt is parallel to rain-bearing South-West Monsoon Winds and as such they do not offer any obstruction. Furthermore, these hills are very low.
>The moisture-laden winds passing over Rajasthan do not saturate as the heat in the desert region increases their capacity to hold moisture. Thus, they reach the Shiwaliks without shedding their moisture.