Discuss the mechanism of monsoons.
Answers
Answer:Monsoons are mainly seasonal winds that reverse their direction according to the change in season. The monsoons starts its journey from the sea to the land in summers and from land to the sea during winters, hence, are a double system of seasonal winds. The duration of the monsoon lies between 100and 120 days initiating from early June to mid-September. At the time of its arrival, the normal rainfall increases suddenly and continues constantly for several days, which is known as the “burst” of the monsoon.
Explanation:
Due to Sun, there is differential heating of land and water.
The Intertropical Convergence Zone or ITCZ shifts over Ganga plains during the Summer.
The high-pressure area, east of Madagascar affects the monsoon.
Due to strong vertical air currents and formation of high pressure over Tibetan plateau, the plateau gets intensely heated during the summer.
Southern Oscillation affects the monsoon.
MECHANISM OF MONSOON:-
>>During summer season as land gets heated up, the air rises and the low-pressure area is created on the land and on the other hand high-pressure area is created in the Indian Ocean. Air moves from high-pressure areas to low-pressure areas. The low-pressure land system attracts south-east trade winds but after crossing equator due to Coriolis force, winds turn right towards the low-pressure areas over the Indian subcontinent. These winds start blowing in a south-westerly direction and enter the Indian peninsula as the southwest monsoon. As it reaches India monsoons are divided into two branches namely - Arabian Sea branch and Bay of Bengal branch.
:)