PowerPoint Presentation

Monsoon : The Mechanism

• Monsoons are seasonal winds that blowing over the Indian Sub-

Continent and are Characterised by reversal of direction of Winds.

• Direction from S-W during summer.


• North-East during winter.


• Differential Heating of land and sea is responsible for Monsoon


• This causes northward Shift of the ITCZ.


• The S-E winds become S-W after crossing the Equator.

IMD has divided Climate if India Into four Seasons :

The Rainy Season :

• June to September.


• S-W Monsoon reaches A & N coast on 25 May


• 1June Chennai and Thiruvanthapuram.


• 5 - 10 June Kolkata and Mumbai.