what are jet streams ? define monsoons
Answers
Explanation:
The Jet Stream Theory. Monsoon is driven by the atmospheric circulation phenomenon which produced by unequal and differential heating of continental and oceanic areas.
Answer:
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Explanation:
Jet Streams and Indian Monsoons
The jet streams are high altitude (9000-12000 m) Westerly winds between middle latitudes (summer 35°N, winter 20°N-35°N) in the Northern hemisphere. Recent researches have shown that these winds exert considerable impact on surface weather conditions. The tropical Easterly jet stream extends far to the North of Tibet of the Tibet and the air flow is roughly along the Kolkata- Bangalore axis. These upper air Easterlies descend into the permanent high pressure area formed over the southern Indian Ocean, This naturally intensifies the high pressure already present there.
It is a form this high pressure cell that the onshore winds start blowing towards the thermally induced low pressure area, developed in the Northern part of the Indian sub-continent. After crossing the equator such winds become South-Westerly and are known as the South-Westerly Summer Monsoons.
These surface winds have vast potentiality for South-Westerly summer, monsoon and precipitation. It is therefore, clear that the strength of the Easterly jet stream is directly related to the intensification of permanent high formed over Southern Indian Ocean. Since this high pressure makes the pressure gradient steeper, so it is the main causative factor for determining the vigour of the summer monsoon.
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