Match List-I with List-II.
| List-I | List-II | ||
|---|---|---|---|
| (A) | Somali Current | (I) | Warm and Stable |
| (B) | N–E Monsoon Current | (II) | Warm and Unstable |
| (C) | North Equatorial Current | (III) | Cold |
| (D) | S–W Monsoon Current | (IV) | Cold and Unstable |
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Ocean currents are warm when they carry water from the tropics and cold when they carry cooler water. In List-II, a stable current flows the same way all through the year, while an unstable current changes or reverses with the season, as the monsoon currents of the north Indian Ocean do.
(A) Somali Current — this matches (III) Cold. The Somali Current runs along the coast of Somalia and reverses with the monsoon; in summer, the winds push its surface water away from the coast and cold water rises from below (upwelling), so it is described as a cold current.
(B) N–E Monsoon Current — this matches (IV) Cold and Unstable. It flows westward across the north Indian Ocean only in the winter monsoon (about November to March), carrying the cooler water of that season.
(C) North Equatorial Current — this matches (I) Warm and Stable. In the Atlantic and the Pacific it flows westward just north of the equator, driven by the trade winds all through the year, and carries warm tropical water.
(D) S–W Monsoon Current — this matches (II) Warm and Unstable. It flows eastward only during the summer monsoon (about May to September) and carries warm water.