Q. Consider the following statements regarding Walker and Hadley circulations:
1.Walker circulation is an east–west (zonal) atmospheric circulation operating mainly over the tropical Pacific Ocean.
2.Hadley circulation involves rising air near the equator and subsidence around 30° latitude in both hemispheres.
3.Strengthening of both Walker and Hadley circulations during La Niña conditions can influence winter weather anomalies over India.
Which of the statements given above is/are correct?
Answer: D
Notes:
Explanation:
- Statement 1 is correct: Walker circulation refers to the zonal (east–west) atmospheric circulation over the tropical Pacific, driven by temperature and pressure differences between the western and eastern Pacific.
- Statement 2 is correct: Hadley circulation is a meridional (north–south) circulation where air rises near the equator, moves poleward aloft, sinks around 30° latitude, and returns equatorward near the surface.
- Statement 3 is correct: During La Niña, the intensification of Walker and Hadley circulations alters global atmospheric circulation patterns, which can lead to winter temperature anomalies over India, including episodes of unusual cold.
Source- DTE
