| What are Jet streams and how do they affect the climate of India? |
| 1. Jet streams are a narrow belt of high altitude (above 12,000m) westerly winds in the troposphere. |
| 2. In summer, the subtropical westerly jet stream moves north of the Himalayas with the apparent movement of the sun. |
| 3. An easterly jet stream, called the tropical easterly jet stream blows over peninsular India, approximately over \[14{}^\circ N\] during the summer months. |
A) Only 1
B) 1 and 2
C) 1 and 3
D) 1, 2 and 3
Correct Answer: D
Solution :
[d] Their speed varies from about 110 km/h in summer to about 184 km/h in winter. A number of separate jet streams have been identified. The most constant are the mid-latitude and the sub-tropical jet stream. Over India, these jet streams blow south of the Himalayas, all through the year except in summer. The western cyclonic disturbances experienced in the north and north-western parts of the country are brought in by this westerly flow.
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