UPSC Express

Which among the following causes heavy precipitation in equatorial regions?
1. Strong convection.
2. Horizontal convergence of the tropical air masses.
3. Large number of weak atmospheric disturbances.
Which of the statements given above is/are correct?
A.
1 and 2 only
B.
1 and 3 only
C.
2 and 3 only
D.
1, 2 and 3
Explanation :
In equatorial region, a very thick layer of atmosphere comprises humid and unstable air. Only a slight uplift of such air masses causes a strong convective activity leading to cloud formation and heavy showers. Thus statement 1 is correct.
Horizontal convergence of the tropical air masses along inter-tropical convergence is another important factor that causes heavy precipitation. Thus statement 2 is also correct.
This equatorial belt is frequented by numerous thunderstorms and weak atmospheric disturbances. These also cause heavy precipitation in the region. Thus statement 3 is also correct.