{"id":1768,"date":"2024-10-23T07:16:55","date_gmt":"2024-10-23T07:16:55","guid":{"rendered":"https:\/\/iasquest.com\/?p=1768"},"modified":"2026-02-11T19:03:30","modified_gmt":"2026-02-11T19:03:30","slug":"gs-1important-geophysical-phenomena-such-as-earthquakes-tsunami-volcanic-activity-cyclone-etc-gs-3disaster-and-disaster-management","status":"publish","type":"post","link":"https:\/\/kingmakersiasacademy.com\/current-affairs\/gs-1important-geophysical-phenomena-such-as-earthquakes-tsunami-volcanic-activity-cyclone-etc-gs-3disaster-and-disaster-management\/","title":{"rendered":"GS-1:Important Geophysical Phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.GS-3:Disaster and Disaster Management;"},"content":{"rendered":"\n

In News:Cyclone Dana to hit Odisha, West Bengal: What is a cyclone and what are its types?<\/strong><\/p>\n\n\n\n

1.Compare and contrast the formation processes, characteristics, and impacts of tropical cyclones and extratropical cyclones.<\/strong><\/p>\n\n\n\n

Tropical cyclones and extratropical cyclones are both large-scale air masses that rotate around a low-pressure centre, but they differ significantly in their formation, characteristics, and impacts.<\/p>\n\n\n\n

Aspect<\/strong><\/td>Tropical Cyclones<\/strong><\/td>Extratropical Cyclones<\/strong><\/td><\/tr>
Formation Processes<\/strong><\/td>Form over warm ocean waters (\u2265 26\u00b0C).<\/td>At the boundary between cold and warm air masses<\/td><\/tr>
Require evaporation of water and rising moist air.<\/td>Derive energy from temperature contrasts (cold and warm fronts).<\/td><\/tr>
Develop in the Intertropical Convergence Zone (ITCZ).<\/td>Common in mid-latitude regions, especially in fall and winter.<\/td><\/tr>
Characteristics<\/strong><\/td>Well-defined eye with low central pressure (as low as 900 mb).<\/td>More elongated structure with warm and cold fronts.<\/td><\/tr>
Strong winds, often exceeding 100 knots.<\/td>Less defined centres; can produce varied weather conditions.<\/td><\/tr>
Compact, with diameters ranging from 320 km to over 1,000 km.<\/td>Can extend for hundreds of kilometres; influenced by the jet stream.<\/td><\/tr>
 Generally do not involve frontal systems; they are warm-core systems.<\/td>Involve frontal systems; develop along cold and warm fronts.<\/td><\/tr>
Originate over warm ocean waters; dissipate over land when moisture supply is cut off.<\/td>Can originate over land or sea but are commonly associated with frontal boundaries in mid-latitudes.<\/td><\/tr>
Impacts<\/strong><\/td>Severe weather events: heavy rainfall, storm surges, high winds.<\/td>Widespread weather changes: precipitation (rain or snow), temperature drops.<\/td><\/tr>
Significant damage in coastal areas; localised impacts.<\/td>Affects multiple regions simultaneously; prolonged adverse weather conditions.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

While both tropical and extratropical cyclones are significant atmospheric phenomena that influence weather patterns, they differ fundamentally in their formation processes, characteristics, and impacts on the environment.<\/p>\n\n\n\n

PYQ<\/strong><\/p>\n\n\n\n

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  1. What is sea surface temperature rise? How does it affect the formation of tropical cyclones?2024<\/li>\n\n\n\n
  2. Discuss the meaning of colour-coded weather warnings for cyclone prone areas given by India Meteorological Department. 2022<\/li>\n\n\n\n
  3. Tropical cyclones are largely confined to South China Sea, Bay of Bengal and Gulf of Mexico. Why?2014<\/li>\n\n\n\n
  4. The recent cyclone on the east coast of India was called \u201cPhailin\u201d. How are tropical cyclones named across the world?2013<\/li>\n<\/ol>\n\n\n\n

    Source:<\/strong><\/p>\n\n\n\n

    https:\/\/indianexpress.com\/article\/explained\/explained-climate\/cyclone-dana-odisha-west-bengal-types-9634514\/<\/a><\/strong><\/p>\n\n\n\n

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