Why there are very few Tropical Cyclones during southwest monsoon season?
1. Strong easterly winds in the upper troposphere and strong westerly winds in the lower troposphere cause strong vertical wind shear which inhibits cyclone development.
2. During this season, the low pressure systems have prolonged oceanic stay.
Which of the statements mentioned above is/are correct?
Explanation:
1. The southwest monsoon is characterized by the presence of strong westerly winds in the lower troposphere (below 5 km) and very strong easterly winds in the upper troposphere (above 9 km). This results in large vertical wind shear. Strong vertical wind shear inhibits cyclone development. Also the potential zone for the development of cyclones shifts to North Bay of Bengal during southwest monsoon season.
2. Low pressure system have short oceanic stay during this season.