PPT: Monsoon Classical Theory Notes | EduRev

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UPSC : PPT: Monsoon Classical Theory Notes | EduRev

 Page 1


Indian 
Monsoon
Page 2


Indian 
Monsoon
Monsoon
?The word ‘monsoon’ has been derived from 
the Arabic word ‘Mausim’ which means 
‘season’. 
?Originally, this word was used by Arab 
traders to describe a system of seasonal 
reversal of winds along the shores of the 
Indian Ocean.
? Monsoons are especially prominent within 
the tropics on the eastern sides of the great 
landmass, but in Asia, it occurs outside the 
tropics in China, Korea and Japan.
Page 3


Indian 
Monsoon
Monsoon
?The word ‘monsoon’ has been derived from 
the Arabic word ‘Mausim’ which means 
‘season’. 
?Originally, this word was used by Arab 
traders to describe a system of seasonal 
reversal of winds along the shores of the 
Indian Ocean.
? Monsoons are especially prominent within 
the tropics on the eastern sides of the great 
landmass, but in Asia, it occurs outside the 
tropics in China, Korea and Japan.
Thermal 
Concept
?Halley, a noted astronomer, 
hypothesized that the primary cause 
of the annual cycle of the Indian 
monsoon circulation was the 
differential heating effects of the 
land and the sea. 
?According to this concept monsoon 
are the extended land breeze and 
sea breeze on a large scale. 
Page 4


Indian 
Monsoon
Monsoon
?The word ‘monsoon’ has been derived from 
the Arabic word ‘Mausim’ which means 
‘season’. 
?Originally, this word was used by Arab 
traders to describe a system of seasonal 
reversal of winds along the shores of the 
Indian Ocean.
? Monsoons are especially prominent within 
the tropics on the eastern sides of the great 
landmass, but in Asia, it occurs outside the 
tropics in China, Korea and Japan.
Thermal 
Concept
?Halley, a noted astronomer, 
hypothesized that the primary cause 
of the annual cycle of the Indian 
monsoon circulation was the 
differential heating effects of the 
land and the sea. 
?According to this concept monsoon 
are the extended land breeze and 
sea breeze on a large scale. 
Page 5


Indian 
Monsoon
Monsoon
?The word ‘monsoon’ has been derived from 
the Arabic word ‘Mausim’ which means 
‘season’. 
?Originally, this word was used by Arab 
traders to describe a system of seasonal 
reversal of winds along the shores of the 
Indian Ocean.
? Monsoons are especially prominent within 
the tropics on the eastern sides of the great 
landmass, but in Asia, it occurs outside the 
tropics in China, Korea and Japan.
Thermal 
Concept
?Halley, a noted astronomer, 
hypothesized that the primary cause 
of the annual cycle of the Indian 
monsoon circulation was the 
differential heating effects of the 
land and the sea. 
?According to this concept monsoon 
are the extended land breeze and 
sea breeze on a large scale. 
During Winter
? During winter the huge landmass of Asia cools 
more rapidly than the surrounding oceans with 
the result that a strong high pressure centre
develops over the continent
? On the other hand, the pressure over adjacent 
oceans is relatively lower. As a consequence the 
pressure gradient directed from land to sea
? Therefore there is an outflow of air from the 
continental landmass towards the adjacent 
oceans so that it brings cold, dry air towards 
the low latitudes
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