Thermal theory ( by Halley ) :-
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ITCZ moves north during the summer month . This creates H.P in the water area and L.P in the Indian subcontinent bcz of the High Heat in the Peshawar Region .
So, as winds blow from H.P area (water region) to L.P ( Indian subcontinent). , It brings rainfall in the Indian subcontinent.
THIS IS SOUTH WEST MONSOON.
However, During the winter season, this ITCZ moves down to the south of equator and cause the retreat of monsoon.
Also,
As the Earth rotates, The trade winds from the south hemisphere tends to deflect towards the west due to coriolis force. That causes the Convergence zone to move to its original place in south ARABIAN SEA. hence the WINTER months are dried and devoid of rainfall .
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ITCZ moves north during the summer month . This creates H.P in the water area and L.P in the Indian subcontinent bcz of the High Heat in the Peshawar Region .
So, as winds blow from H.P area (water region) to L.P ( Indian subcontinent). , It brings rainfall in the Indian subcontinent.
THIS IS SOUTH WEST MONSOON.
However, During the winter season, this ITCZ moves down to the south of equator and cause the retreat of monsoon.
Also,
As the Earth rotates, The trade winds from the south hemisphere tends to deflect towards the west due to coriolis force. That causes the Convergence zone to move to its original place in south ARABIAN SEA. hence the WINTER months are dried and devoid of rainfall .
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