discuss the mechanism of monsoons ? write any six points
Answers
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1. The differential heating and cooling of land and water creates low pressure on the landmass of India while the seas around experience comparatively high pressure.
2. The shift of the position of Inter Tropical Convergence Zone ( ITCZ) in summer over the Ganga plain.
3. The presence of the high pressure area.
4. The intensity and high position of this high pressure area effect the Indian monsoon.
5. The duration of the monsoon is between 100 to 120 days.
6. By the end of this period, the low pressure system over north and north-west India gradually weakens, and this leads to the retreat of the monsoon winds.
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Answer:
The monsoons are experienced in the
tropical area roughly between 20°N
and 20°S. The following facts will help
us understand the mechanism of the monsoons:
The differential heating and cooling of
land and water creates low pressure
on the landmass of India while the
seas around experience comparatively
high pressure.
The shift of the position of Inter
Tropical Convergence Zone (ITCZ) in
summer, over the Ganga plain. This
is the equatorial trough normally
positioned about 5°N of the equator. It
is also known as the monsoon trough
during the monsoon season.
The presence of the high pressure area,
east of Madagascar, approximately
at 20°C over the Indian Ocean. The
intensity and position of this high
pressure area affects the Indian monsoon.