During monsoon season the ITCZ (inter tropical convergence zone) shifts almost upto 25 degree North latitude over the Indian subcontinent while it rarely crosses 15 degree North latitude in other regions. This is because
1. Vast landmass of Eurasia located to the North of the Equator.
2. Intense low pressure over the Northwestern region of Indian subcontinent and over the vast, high altitude Tibetan plateau pulls ITCZ Northwards.
3. Shifting of Westerly jet streams to the North of Tibetan plateauat the end of the month of May.
Choose the correct code from the following
1, 2 only.
2, 3 only.
1, 3 only.
All of the above.
Explanation:
Inter tropical convergence zone is termed as a thermal equator and is the zone where the Northeastand Southeast trade winds meet. This ITCZ shifts Northwards upto 25 degree North latitude duringthe months of June-July. This is facilitated by all the above points mentioned.Westerly jet streams: These shifts southward during winters because of the southern shift of entirepressure belts by some 10 degree latitudes which is in turn because of Southern shift of Sun towardsTropic of Capricorn during winters. These jet streams because of vast Tibetan plateau,get bifurcatedinto 2 parts, with one part traversing south of Himalyan mountains and the other to the north ofTibetan plateau. With the advent of summers and gradual shift of Sun towards Tropic of Cancer, thepart of the jet streams to the South of Himalayas gets weakened. At the end of the month of Maythe Westerly jet streams completely shifts to the North of Himalayas and thus becomes strongerover the Central China and also Japan. This Northern shift facilitates the Northward shift of ITCZ.
Inter tropical convergence zone is termed as a thermal equator and is the zone where the Northeastand Southeast trade winds meet. This ITCZ shifts Northwards upto 25 degree North latitude duringthe months of June-July. This is facilitated by all the above points mentioned.Westerly jet streams: These shifts southward during winters because of the southern shift of entirepressure belts by some 10 degree latitudes which is in turn because of Southern shift of Sun towardsTropic of Capricorn during winters. These jet streams because of vast Tibetan plateau,get bifurcatedinto 2 parts, with one part traversing south of Himalyan mountains and the other to the north ofTibetan plateau. With the advent of summers and gradual shift of Sun towards Tropic of Cancer, thepart of the jet streams to the South of Himalayas gets weakened. At the end of the month of Maythe Westerly jet streams completely shifts to the North of Himalayas and thus becomes strongerover the Central China and also Japan. This Northern shift facilitates the Northward shift of ITCZ.