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Saurabh
HVB Academy, Mumbai

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INDIA CLIMATE STD 9 GIVE REASONS FOR THE FOLLOWING:a)Punjab /Haryana/ Kashmir get Winter Rain. A)They get winter rainfall from the Westerly Depression (Temperate Cyclones) originating in the Mediterranean Sea I Atlantic Ocean, as they lie in the temperate zone and are therefore in the pathway of these depression. b)Shillong /Dispur / Guwahati get less than 200 cm of rainfall annually, whereas Cherrapunji / Mawsynrarn which is nearby gets over 1250 cm of rainfall annually. A)Cherrapunji/ Mawsynram lies on the windward side of the Khasi hills and receives rainfall from the 'V.W. Monsoon Bay of Bengal 'branch while Shillong / Dispur / Guwahati lie on the leeward side of the Khasi hills and so they receive less rainfall being in the Rain Shadow area. c)The Coromandel Coast / Andhra Pradesh /Orissa / Tamil Nadu coasts have more rainy- months, but less rainfall than the Konkan Coast I Malabar Coast / Kanara / Coastal Maharashtra ( Karnataka State / Goa I Kerala. A)This because the Coromandel Coast is on the East Coast of India and receives little rain from the South West Monsoon winds in summer as it is on the leeward side. It also receives rain from the retreating monsoons. In addition to this it also receives rain from the North East Monsoons in winter, but the total amount of rain received is comparatively less as these winds are less forceful and carry less water. The Konkan coast is on the West side of India and receives rain from the South West Monsoon (winds) Arabian Sea branch and this branch is very forceful as the sea mass over which it blows is much larger. The total volume of the Arabian Sea current is probably 3 times more than the Bay of Bengal branch. d)In spite of the Aravalli hills, many parts of Rajasthan, Western Rajasthan /Bikaner / Jaisalmer / Jodhpur /Pokaran do not receive much rainfall. A)This is because the Aravallis lie parallel to the South West monsoon Arabian Sea branch. For this reason the winds by pass this region and no rain is shed as there are no mountain ranges that lie transversely across. More over this region is also on the leeward side or in the Rain shadow area /region when the South West Monsoon Bay of Bengal branch blows. e)' Rainfall decreases as one travels up the Ganga valley. ' A)The S.W. Monsoon Bay of Bengal branch deflects when it comes in contact with the Garo, and Jaintia hills in Assam moving up the Ganga Valley. The rain decreases as it is shed while following the line of the mountains. 1

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