Topic: Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.,
1. Explain the process of tropical cyclogenesis with an emphasis on the main factors responsible for tropical cyclogenesis. (250 words)
Difficulty level: Easy
Reference: Indian Express , Insights on India
Why the question:
With the cyclonic storm ‘Mandous’, brewing over the Bay of Bengal, likely to hit north Tamil Nadu and Puducherry coasts around December 10, intense rain lashed many districts of Tamil Nadu since Thursday. The IMD in its forecast On December 9, predicted intense rain with intense spells of rain likely to occur at a few places over Tiruvallur, Chennai, Chengalpattu and Kancheepuram districts, it said.
Key Demand of the question:
To write about the process of tropical cyclogenesis with factors responsible for it.
Explain – Clarify the topic by giving a detailed account as to how and why it occurred, or what is the context. You must be defining key terms wherever appropriate and substantiate with relevant associated facts.
Structure of the answer:
Begin by defining cyclogenesis.
In the first part, with a small-labelled diagram explain the process of cyclogenesis.
Next, write about the various factors responsible for tropical cyclogenesis – sufficiently warm sea surface temperatures, atmospheric instability, high humidity in the lower to middle levels of the troposphere, enough Coriolis force to sustain a low-pressure centre, a pre-existing low level focus or disturbance, and low vertical wind shear etc. Cite examples to substantiate.
Conclude by summarising.