Topic : Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes
1. What do you understand by ‘recurving of cyclones’? Discuss with recent examples and also focus the factors supporting such events. (250 words)
Reference: The Hindu
Why the question:
Recently Scientists have revealed that re-curving cyclones play an important role in sensing the movement of cyclones, thus the question.
Key Demand of the question:
Explain what you understand by ‘recurving of cyclones’ and discuss with recent examples and also focus the factors supporting such events.
Discuss – This is an all-encompassing directive – you have to debate on paper by going through the details of the issues concerned by examining each one of them. You have to give reasons for both for and against arguments.
Structure of the answer:
One can start with the definition of ‘recurving of cyclones’.
Explain in detail the key features of it; on its way to diminish if cyclone gets a sort of second wind by deflected right or eastwards is known as re-curving cyclones. This is due to air currents in the local atmosphere that push cold air from the poles towards the equator and interfere with cyclone formation.
In the southern hemisphere, the cyclones spin clockwise and therefore also re-curve in the opposite direction. During the monsoon months, cyclones in the Western Pacific move westwards towards India and aid the associated rain-bearing systems over the country. However, in the years of a re-curve, they do not give as much of a push to the rain as they do in the good monsoon years.
One can present the example of cyclone Ockhi; present details and explain the effects of recurving.
Conclude by discussing its implications and suggest solutions to address the same.