Relevance:
Bangladesh has been devastated by Cyclone Sitrang, which slammed into densely-populated, low-lying areas.
About Sitrang:
- Named by Thailand
- First tropical cyclone of the post-monsoon season of 2022.
About Cyclones:
- Cyclones are rapid inward air circulation around a low-pressure area.
- Classification –
- Tropical Cyclones: Originate between the Tropics of Capricorn and Cancer
- Extra Tropical/ Temperate Cyclones: Originate in the Polar Regions
Cyclone vs Anticyclone –
About Tropical Cyclones:
- An intense circular storm that originates over warm tropical oceans.
- Characteristic features –
- Eye, a central region of clear skies, warm temperatures, and low atmospheric pressure.
- Low atmospheric pressure, high winds, and heavy rain.
- Conditions for Formation –
- Large sea surface with temperature >27° C.
- Presence of the Coriolis force
- Small variations in the vertical wind speed
- A pre-existing weak low- pressure area
- Upper divergence above the sea level system
- Nomenclature –
- Nodal Authority – World Meteorological Organization (WMO)
- Indian Ocean Region – 13 member countries of WMO/ESCAP Panel on Tropical Cyclones (Bangladesh, India, Iran, Maldives, Myanmar, Oman, Pakistan, Qatar, Saudi Arabia, Sri Lanka, Thailand, United Arab Emirates and Yemen)
- Cyclones in India
- Bi-annual Cyclone Season – March to May and October to December
- Recent Cyclones –
- Arabian Sea: Tauktae, Vayu, Nisarga and Mekanu
- Bay of Bengal: Asani, Amphan, Fani, Nivar, Bulbul, Titli, Yaas and Sitrang
Reference: The Hindu
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