Explain the three factors which affect the mechanism of monsoon .
Dear Student,
Three factors that impact mechanism of monsoon are:
a. Shifting of ITCZ-Inter Tropical Convergence Zone (ITCZ) which is the equatorial trough (lower pressure area impacts India's climate to a great extent. It is an area where north East and south east trade winds come together and impacts the rainfall .Shifting of ITCZ results in advancing and retreating monsoon in the country. In advancing monsoon, the trough and its axis keeps on moving northward or southward, which determines the spatial distribution of rainfall, for example, When the axis of the monsoon trough lies over
the plains, rainfall is good in these parts.While for retreating monsoon,with the movement of the sun towards the south, the monsoon trough becomes weaker and we experience withdrawal of monsoon. When ITCZ and jet streams move southwards towards tropic of Capricorn it leads to dry monsoon in India
b. Different pressure condition- During advancing monsoon low pressure conditions develops over northern plains and during retreating , high pressure system develops that weakens the south west monsoon. Such different pressure conditions , impacts the monsoon in our country.
c. Effect of EL Nino: EL Nino is the event where the waters of the tropical central and Eastern pacific become warmer than normal. This has the effect of increasing rainfall in this general area, but over the Western Pacific air pressures tend to increase and suppress rainfall thus it is typically drier than average in that region. El Nino in India makes Monsoon weak, and kills it. El Nino weakens the trade winds, may even lead to reverse wind direction that allows the warmer water from the western Pacific to flow towards the east. Shift of warm waters from eastern south Indian ocean may impact the rainfall in South east Asia.
Regards
Three factors that impact mechanism of monsoon are:
a. Shifting of ITCZ-Inter Tropical Convergence Zone (ITCZ) which is the equatorial trough (lower pressure area impacts India's climate to a great extent. It is an area where north East and south east trade winds come together and impacts the rainfall .Shifting of ITCZ results in advancing and retreating monsoon in the country. In advancing monsoon, the trough and its axis keeps on moving northward or southward, which determines the spatial distribution of rainfall, for example, When the axis of the monsoon trough lies over
the plains, rainfall is good in these parts.While for retreating monsoon,with the movement of the sun towards the south, the monsoon trough becomes weaker and we experience withdrawal of monsoon. When ITCZ and jet streams move southwards towards tropic of Capricorn it leads to dry monsoon in India
b. Different pressure condition- During advancing monsoon low pressure conditions develops over northern plains and during retreating , high pressure system develops that weakens the south west monsoon. Such different pressure conditions , impacts the monsoon in our country.
c. Effect of EL Nino: EL Nino is the event where the waters of the tropical central and Eastern pacific become warmer than normal. This has the effect of increasing rainfall in this general area, but over the Western Pacific air pressures tend to increase and suppress rainfall thus it is typically drier than average in that region. El Nino in India makes Monsoon weak, and kills it. El Nino weakens the trade winds, may even lead to reverse wind direction that allows the warmer water from the western Pacific to flow towards the east. Shift of warm waters from eastern south Indian ocean may impact the rainfall in South east Asia.
Regards