Consider the following characteristics of a tropical cyclone 1 A warm sea temperature of gt 26oC 2 H...........

Geography and Environment (NDA) Envirnment and Climate Change

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Consider the following characteristics of a tropical cyclone:

1. A warm sea temperature of > 26^oC

2. High relative humidity of atmosphere at a height of > 700 m

3. Atmospheric instability

The above mentioned characteristics are associated with which one of the following cycles of its development?

Formulation and initial stage

Modification stage

Full maturity

Decay

Explanation:

Following atmospheric and oceanic conditions are necessary for development of a cyclonic storm. (This is called as formulation stage)
(i) A warm sea temperature in excess of 26 degrees centigrade to a depth of 60m, which provides abundant water vapour in the air by evaporation.
(ii) High relative humidity of the atmosphere to a height of above 7,00 m facilitates condensation of water vapour into water droplets and clouds, releases heat energy thereby inducing a drop in pressure.
(iii) Atmospheric instability encourages formation of massive vertical cumulus cloud convection with condensation of rising air over ocean.