The monsoon is caused by differing temperature trends over the land and ocean. In India, the southwest summer monsoon is attracted by a low pressure area that’s caused by the extreme heat of the Thar Desert in Rajasthan and adjoining areas during summer. During the monsoon, the wind direction reverses.
What are the causes of South-West monsoon?
The monsoon is driven by the sun heating up the land and the Pacific Ocean at different rates, with land surfaces warming more quickly than the ocean. The warm land creates low-pressure zones as hot air rises. Once this pattern establishes across the region, the winds shift to fill in the vacuum.
Which winds cause South-West monsoon?
Due to the shift of ITCZ, the trade winds of the southern hemisphere cross the equator between 40° and 60°E longitudes and start blowing from southwest to northeast due to the Coriolis force. It becomes southwest monsoon.
What is Southwest monsoon India?
The period June to September is referred to as the ‘Southwest Monsoon’ period. Southwest Monsoon period is the principal rainy season for the Indian subcontinent. This is the summer monsoon period where the southwest monsoon holds away over the country.
What is the cause of monsoon rainfall taking place in India?
The monsoon, which is essentially the seasonal reversal in wind direction, causes most of the rainfall received in India and some other parts of the world. The primary cause of monsoons is the difference between annual temperature trends over land and sea.
What is the other name for South-West monsoon?
The north-east monsoon, commonly known as winter monsoon blows from land to sea, whereas south-west monsoon, known as summer monsoon blows from sea to land after crossing the Indian Ocean, the Arabian Sea, and the Bay of Bengal.
What triggers a monsoon?
What causes a monsoon? A monsoon (from the Arabic mawsim, which means “season”) arises due to a difference in temperatures between a land mass and the adjacent ocean, according to the National Weather Service.
What are South West monsoon winds Class 9?
The South West monsoon winds are known for their vagaries____. … A low pressure zone is created over north India that attracts moist winds from the high pressure area in the south of Indian Ocean. These winds cause rainfall in most parts of India and are known as southwest monsoons.
What are the types of monsoon?
The Types of Monsoons
- Monsoon Cycles. In India, Australia and other equatorial regions, monsoons move from cold, high pressure systems to warmer areas of less resistance with low atmospheric pressure. …
- Summer Monsoons. …
- Dry Monsoons. …
- Embryo Monsoons.
What are the branches of Indian monsoon?
The two branches of monsoon are ‘Arabian Sea branch‘ and ‘Bay of Bengal branch‘.
What weather is monsoon?
A monsoon is a seasonal change in the direction of the prevailing, or strongest, winds of a region. Monsoons cause wet and dry seasons throughout much of the tropics. Monsoons are most often associated with the Indian Ocean. Monsoons always blow from cold to warm regions.
In which month do the monsoon arrive in India?
June 1 is regarded as the date of onset of the monsoon in India, as indicated by the arrival of the monsoon in the southernmost state of Kerala. The monsoon accounts for nearly 80% of the rainfall in India.
In which month rainy season comes in India?
|Winter||December to January||Very Cool|
|Spring||Feburary to March||Sunny and pleasant.|
|Summer||April to June||Hot|
|Monsoon||July to Mid-September||Wet, hot and humid|
What is the mechanism of Indian monsoon?
Indian Monsoons are Convection cells on a very large scale. They are periodic or secondary winds which seasonal reversal in wind direction. India receives south-west monsoon winds in summer and north-east monsoon winds in winter.
What are the factors affecting Indian monsoon?
Factors influencing the onset of SW monsoons:
- Intense low-pressure formation over the Tibetan Plateau.
- The permanent high-pressure cell in the South of the Indian Ocean.
- Subtropical jet stream.
- African Easterly jet (Tropical easterly jet)
- Inter-Tropical Convergence Zone (ITCZ)
Why is the monsoon so important to India?
The monsoon delivers about 70% of India’s annual rainfall and determines the yield of rice, wheat, sugarcane and oilseeds, such as soybeans. Farming makes up about 15% of India’s $2.5 trillion economy but employs more than half of its 1.3 billion people.