Discuss the mechanism of easterly jet stream and Indian monsoon
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What are Jet Streams?
Jet stream, narrow, swift currents or tubes of air found at heights ranging from 7 to 8 mi (11.3–12.9 km) above the surface of the earth.
They are caused by great temperature differences between adjacent air masses. There are four major jet streams. Although discontinuous at some points, they circle the globe at middle and polar latitudes, both in each hemisphere.
The mean position of the stream in the Northern Hemisphere is between lat. 20 and 50 degrees N; the polar stream is between lat 30 and 70 degrees N.
Wind speeds average 35 mi (56.3 km) per hr in summer and 75 mi (120.7 km) per hr in winter, although speeds as high as 200 mi (321.9 km) per hr have been recorded. Instead of moving along a straight line, the jet stream flows in a wavelike fashion
Mechanism of Monsoon:
Today the Mechanism of Monsoon is a widely-studied subject globally.
The following facts are important to understand the mechanism of Indian monsoon:
Differential Heating and Cooling of Land and Water
a. Due to this lower pressure is found on the landmass.
b. High pressure is found on the water bodies/seas and oceans around India.
Shift in the position of Inter Tropical Convergence Zone (ITCZ)
a. Inter Tropical Convergence Zone is the equatorial trough (lower pressure area). It is normally positioned at 5° north of equator.
b. During summer it shifts its position to the Ganga plain, and is also known as monsoon trough, during the monsoon season.
Jet stream, narrow, swift currents or tubes of air found at heights ranging from 7 to 8 mi (11.3–12.9 km) above the surface of the earth.
They are caused by great temperature differences between adjacent air masses. There are four major jet streams. Although discontinuous at some points, they circle the globe at middle and polar latitudes, both in each hemisphere.
The mean position of the stream in the Northern Hemisphere is between lat. 20 and 50 degrees N; the polar stream is between lat 30 and 70 degrees N.
Wind speeds average 35 mi (56.3 km) per hr in summer and 75 mi (120.7 km) per hr in winter, although speeds as high as 200 mi (321.9 km) per hr have been recorded. Instead of moving along a straight line, the jet stream flows in a wavelike fashion
Mechanism of Monsoon:
Today the Mechanism of Monsoon is a widely-studied subject globally.
The following facts are important to understand the mechanism of Indian monsoon:
Differential Heating and Cooling of Land and Water
a. Due to this lower pressure is found on the landmass.
b. High pressure is found on the water bodies/seas and oceans around India.
Shift in the position of Inter Tropical Convergence Zone (ITCZ)
a. Inter Tropical Convergence Zone is the equatorial trough (lower pressure area). It is normally positioned at 5° north of equator.
b. During summer it shifts its position to the Ganga plain, and is also known as monsoon trough, during the monsoon season.
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