GS1 › Geophysical Phenomena and Resource Distribution
Revision note: Tropical Cyclones and Other Atmospheric Hazards
- Hurricanes (Atlantic), typhoons (W Pacific), willy-willies (Australia); anticlockwise in NH
- Needs: SST ≥26–27°C, Coriolis (not within ~5° of equator), low shear, pre-existing low
- Eye = calm, lowest pressure; eye wall = strongest winds
- IMD: super cyclone ≥222 km/h; IMD is RSMC; 13 countries name cyclones
- Bay ~4× Arabian Sea; Arabian Sea warming (Tauktae, Biparjoy)
- Storm surge deadliest; Odisha 1999 → Phailin 2013 success
- Lightning top killer; heatwave ≥40°C plains; cloudburst ≥10 cm/hour
Source: https://upscprep.in/upsc/gs1/geophysical-phenomena-and-resource-distribution/tropical-cyclones-and-other-atmospheric-hazards/ · UPSCPrep.in