Tropical cyclonesare largely confined to the South China Sea, Bayof Bengal and Gulf of Mexico. Why? | Date 19.05.21
Ans: Tropical cyclones are violent storms that originate over oceans in tropical areas and move over to the coastal areas bringing about large scale destruction caused by violent winds, very heavy rainfall and storm surges. They develop around a low-pressure area.
Tropical cyclones originate and intensify over warm tropical oceans. The conditions favourable for the formation and intensification of tropical storms are:
- Large sea surface with a temperature higher than 27°
- Presence of the Coriolis
- Small variations in the vertical wind
- A pre- existing weak low-pressure area or low-level-cyclonic circulation.
- Upper divergence above the sea level
Tropical cyclones across the world:
Conditions responsible for more cyclones in the South China Sea, Bay of Bengal and Gulf of Mexico
- Shallow warm water in tropical areas around The Inter-Tropical Convergence Zone (ITCZ)
- All are shallow bay surrounded by land on three sides at least leading to more warming
- Also, Shallow waters have better penetration of sunlight increased warming
- These are areas affected by warm ocean current coming from equatorial regions