Westerly winds and weather patterns
Question
Consider the following statements:
Which of the statements given above is/are correct?
- 1.
The winds which blow between 30° N and 60° S latitudes throughout the year are known as westerlies.
- 2.
The moist air masses that cause winter rains in North-Western region of India are part of westerlies.
Options
1 only
2 only
Both 1 and 2
Neither 1 nor 2
Explanation
Statement 1 is correct but needs clarification on latitude range. Westerlies blow between 30° and 60° in both hemispheres (30° N to 60° N and 30° S to 60° S), bringing prevailing westerly winds. Statement 2 is also correct. The winter rains in North-Western India during December-February are caused by westerly disturbances (part of the westerly wind system) that bring moist air masses from the Mediterranean and Atlantic regions. These westerlies penetrate into India's northwestern plains, causing winter precipitation. > Westerlies are responsible for both general circulation patterns and specific weather phenomena like winter rains in North-Western India.
Question details
Year
2015
Paper
GS Paper 1
Question
Q66
Subject
Geography
Sub-topic
Wind systems and weather
Type
Statement-based
Difficulty
Medium
Nature
Static
Source hint
NCERT Geography - Wind systems
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