INDIAN MONSOONS
WHAT IS INDIAN MONSOON?
- Monsoons are seasonal winds that reverse their direction with changes in season.
- Travel from the sea to the land in summers- southwest monsoon.
- Travel from land to the sea during winters- northeast monsoons.
- these winds were used by traders and seafarers to move from place to place.
WHAT IS SOUTHWEST MONSOON?
- These winds arise because of the formation of an intense low-pressure over the Tibetan Plateau.
WHAT IS NORTHEAST MONSOON?
- These winds arise due to the high-pressure cells that are formed over the Siberian and Tibetan plateaus.
WHAT ARE THE FEATURES OF MONSOON?
- Relief /Orographic rainfall
- Erratic
- Unpredictable
- Unevenly distributed
WHAT IS THE MECHANISM OF INDIAN MONSOONS?
- In Central Asia, sunlight heats both land and ocean surfaces, but land temperatures rise more quickly.
- As the land’s surface becomes warmer, an area of low pressure develops due to air expands.
- Meanwhile, the ocean remains at a lower temperature than the land
- So, the air above it retains a higher pressure.
- As winds flow from high to low pressure area, this deficit in pressure causes winds to blow from ocean-to-land.
- With this moist air is brought inland with so much rain.
- The north western part of India grows colder than Arabian Sea and Bay of Bengal
- This reverses the flow of the monsoon.
- These are called Retreating Monsoons.