Note4Students
From UPSC perspective, the following things are important :
Prelims level: Cyclone Fengal
Why in the News?
- A depression over the Southwest Bay of Bengal has intensified into a deep depression and is likely to further intensify into Cyclone Fengal.
- The system is currently close to an area with higher sea surface temperatures (SST), contributing to its potential intensification into a cyclonic storm.
Origin of the Name ‘Fengal’
Cyclone Naming Process:
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What are Cyclones?
| About | Cyclones are wind systems that rotate inward toward an area of low atmospheric pressure.
Categories: Tropical cyclones (temperature-induced) and Temperate cyclones (extra-tropical, air-mass induced). |
| Geographical Causes | Tropical cyclones form under specific conditions: • Warm sea surface (greater than 27°C) • Coriolis force • Pre-existing low-pressure systems • Small vertical wind speed differences • Upper air divergence |
| Features | Cyclones form over warm water bodies due to the energy derived from the condensation of warm water in cumulonimbus clouds. • Wind rotation is influenced by Coriolis force, causing: • Anti-clockwise rotation in the northern hemisphere • Clockwise rotation in the southern hemisphere • Cyclone activity halts around 30° latitude, where the warmth that fuels the cyclones diminishes. |
PYQ:[2015] In the South Atlantic and South Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the main reason behind this? (a) Sea Surface temperature are low (b) Inter Tropical Convergence Zone seldom occurs (c) Coriolis force is too weak (d) Absence of land in those regions |
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