Monsoon Systems Questions and Answers

Answer: B

The heavy rain falls in the SW sector of the track.

Monsoon depressions form over the head of the Bay of Bengal and move west-north-west across central India. The heaviest rainfall is concentrated in the south-western sector, to the left of the track, where the moist south-westerly monsoon flow converges into the system, and it is usually spread over a belt a few hundred kilometres wide there.

This is a known asymmetry of Indian monsoon depressions. The north-west sector and the generic 'east of the track' get much less rain, and 'west of the track' is too loose, since it is the south-western quadrant specifically that receives the heavy falls.

Answer: D

The Tropical Easterly Jet is present during summer monsoon season over SE Asia and India.

The TEJ is a strong easterly current at about 100 to 150 hPa (14 to 16 km). It forms in June to September above the Tibetan high, which is heated by the summer plateau, and blows from SE Asia across peninsular India towards Africa, with peak speeds near 15°N.

It is seasonal, so 'throughout the year' is wrong. It lies over the tropics, not the subtropics, and does not occur in the northern winter, when the subtropical westerly jet dominates over India instead.