Why does seasonal reversal of wind direction?
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Asked by: Porsha Marie
Answer: Seasonal reversal of wind direction over the Indian subcontinent takes place due to pressure differential. El Nino has major role to play in the seasonal reversal of wind direction over the Indian subcontinent. The bulk of rainfall in India is concentrated over a few months.
Which winds reverse their directions seasonally?
monsoon, a major wind system that seasonally reverses its direction—such as one that blows for approximately six months from the northeast and six months from the southwest. The most prominent monsoons occur in South Asia, Africa, Australia, and the Pacific coast of Central America.
What does seasonal reversal mean?
Seasonal Reversal of Wind- During the summer season, a low pressure area is created over the Indian landmass. Air moves from high pressure area over the Indian Ocean to the low pressure area over the land in a south-westerly direction after crossing the equator. This air forms the south west monsoon winds.
What causes reversal of monsoon winds?
During the winter season, the air above the land cools faster than the air over the water, establishing a pressure gradient force from land to sea. The winds are therefore reversed from the summer monsoon flow — from land to sea instead of from sea to land.
Why is phenomenon called monsoon undergoes seasonal reversal of wind in a year?
As compared to the landmass, water heats up or cools down slowly. This differential heating of land and sea creates different air pressure zones in different seasons in and around the Indian subcontinent. Difference in air pressure causes reversal in the direction of monsoon winds.
What is wind reversal?
Answer: The seasonal reversal in wind direction during a year is called monsoon.
What causes the monsoon winds to deflect towards the west over the Ganga plains?
The Arabian Sea branch reaches Mumbai about ten days later on approximately the 10th of June. The Bay of Bengal branch also advances rapidly and arrives in Assam in the first week of June. The lofty mountains cause the monsoon winds to deflect towards the west over the Ganga plains.
What causes a complete reversal of the direction of winds during summer in the Indian mainland?
(a) In summer, a low pressure area develops over interior Asia as well as over north-western India. (b) This causes a complete reversal of the direction of winds during summer.
Why does rainfall decrease from east to west?
Rainfall decreases from the east to the west in Northern India because there is a decrease in the moisture content of the winds.
Who named the seasonal reversal of wind system of monsoon?
The Arabs
The Arabs, who had also come to India as traders named this seasonal reversal of the wind system ‘Monsoon’.
Who discovered the direction of monsoon wind?
Hippalus, a Greek navigator, is credited with discovering the monsoon wind in AD 45-47. Before the discovery of the monsoon wind, mariners in Orissa are said to have begun the journey to southeast Asian countries during the northeast monsoon (trade wind) and returned during the southwest monsoon.
Why is India not an arid land?
Since India lies in the path of the North Easterly wind that hardly carries any moisture or rain, India should have been a arid land. However due to the the phenomenon of monsoon where there is a the seasonal reversal of winds the country receives rainfall.
