differentiate between South West and North East monsoon
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Southwest monsoon brings rain during summer whereas Northeast monsoon brings rain during winter.Direction of Southeast monsoon is sea to land and so it brings huge amount of rainfall .Direction of Northeast monsoon is sea to land so it doesn't contains moisture and brings dryness and coldness after blowing through bay of Bengal and brings rainfall only in Tamil Nadu
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The average maximum temperature is above 33°C in the month of May at Delhi, Jodhpur and Jaisalmer. Such high temperature heats up the air of that region. Hot air rises and due to this a low pressure area is created under it. This low pressure is also known as monsoonal trough. It lies between western Rajasthan to Odisha
On the other hand temperature over Indian Ocean is relatively low. So a relatively high pressure region is created over the sea.
The pressure difference between Indian Ocean and North Central Indian Plains causes the air from high pressure region of the sea move towards the low pressure region of North India. This implies that the general movement of air is in June is from equatorial region of Indian Ocean to the Indian subcontinent in the South-West to North-East direction. This direction is exactly opposite to that of the trade winds (North – East to South-West) prevailing during winter in India. This complete reversal of wind direction from North-East to South West and vice-versa is known as monsoons. The winds contain a lot of moisture. When these moisture laden winds move over the Indian sub-continent they cause wide spread rain throughout India and from June to September. Thus, most of the total rainfall in India is confined to these four months only.
Winter Monsoon
During the winter season, North-East trade windsprevail over India. They blow from land to sea and that is why that for most part of the country, it is a dry season. A part of North-East trade winds blow over Bay of Bengal. They gather moisture which causes rainfall in the Coromandal coast while the rest of the country remains dry. Strictly speaking these winds are planetary winds known as Northeast Trades. In India they are essentially land bearing winds.
On the other hand temperature over Indian Ocean is relatively low. So a relatively high pressure region is created over the sea.
The pressure difference between Indian Ocean and North Central Indian Plains causes the air from high pressure region of the sea move towards the low pressure region of North India. This implies that the general movement of air is in June is from equatorial region of Indian Ocean to the Indian subcontinent in the South-West to North-East direction. This direction is exactly opposite to that of the trade winds (North – East to South-West) prevailing during winter in India. This complete reversal of wind direction from North-East to South West and vice-versa is known as monsoons. The winds contain a lot of moisture. When these moisture laden winds move over the Indian sub-continent they cause wide spread rain throughout India and from June to September. Thus, most of the total rainfall in India is confined to these four months only.
Winter Monsoon
During the winter season, North-East trade windsprevail over India. They blow from land to sea and that is why that for most part of the country, it is a dry season. A part of North-East trade winds blow over Bay of Bengal. They gather moisture which causes rainfall in the Coromandal coast while the rest of the country remains dry. Strictly speaking these winds are planetary winds known as Northeast Trades. In India they are essentially land bearing winds.
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