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Q66·GS Paper 1 · Prelims 2015

Westerly winds and weather patterns

GeographyWind systems and weatherStatement-basedMediumStatic

Question

Consider the following statements:

1The winds which blow between 30° N and 60° S latitudes throughout the year are known as westerlies.
2The moist air masses that cause winter rains in North-Western region of India are part of westerlies.

Which of the statements given above is/are correct?

  1. 1.

    The winds which blow between 30° N and 60° S latitudes throughout the year are known as westerlies.

  2. 2.

    The moist air masses that cause winter rains in North-Western region of India are part of westerlies.

Options

a

1 only

b

2 only

c

Both 1 and 2

Answer
d

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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