Consider the following statements : Statement-I : Thickness of the troposphere at the equator is much greater as compared to poles. Statement-II : At the equator, heat is transported to great heights by strong convectional currents. Which one of the following is correct in respect of the above statements ?
A
Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
Correct answer
B
Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
C
Statement-I is correct, but Statement-II is incorrect
D
Statement-I is incorrect, but Statement-II is correct
Explanation
The troposphere is about 18 km thick at the equator but only about 8 km at the poles (Statement I). The reason is Statement II: strong convection over the hot equatorial surface carries heat and air to great heights, pushing the top of the troposphere higher. So both statements are correct and II explains I.
Climatology & Atmosphere