Question

what is the difference between the subtropical easterly jet stream and subtropical Westerly jet stream??

Answer 1

SUBTROPICAL JET STREAMS.— These jets, like the polar-front jets, are best developed in winter and early spring. During summer, in the Northern Hemisphere, the subtropical jet weakens considerably, and it is only identifiable in sporadic velocity streaks around the globe. During winter, subtropical jets intensify and can be found between 20° and 50° latitude. Their maximum speed approaches 300 knots, although these higher wind speeds are associated with their merger with polar-front jets. The core is most frequently found between 35,000 and 40,000 feet. A subsidence motion accompanies subtropical jets and gives rise to predominantly fair weather in areas they pass over. These jets are also remarkably persistent from time to time, but they do fluctuate daily. Sometimes they drift northward and merge with a polar-front jet. Over Asia in summer, the subtropical jet is replaced by the tropical easterly jet stream.
The Tropical Easterly Jet is the meteorological term referring to an upper level easterly wind that starts in late June and continues until early September. This strong flow of air that develops in the upper atmosphere during the Asian monsoon is centred on 15°N, 50-80°E and extends from South-East Asia to Africa.

Answer 2

Answer:

The upper air circulation in this region is

dominated by a westerly flow. An important

component of this flow is the jet stream.

These jet streams are located approximately

over 27°-30° north latitude, therefore, they are

known as subtropical westerly jet streams. Over

India, these jet streams blow south of the Himalayas, all through the year except in

summer. The western cyclonic disturbances

experienced in the north and north-western parts

of the country are brought in by this westerly

flow. In summer, the subtropical westerly jet

stream moves north of the Himalayas with the

apparent movement of the sun. An easterly jet

stream, called the sub-tropical easterly jet stream

blows over peninsular India, approximately over 14°N during the summer months.