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Home Geography

Hurricane Ida

August 31, 2021
in Geography
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Hurricane Ida
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In news– Hurricane Ida made a devastating effect in the USA recently.

About Hurricane Ida

  • It is  a weakening tropical depression that became the second most intense hurricane to strike the U.S. state of Louisiana on record, only behind Hurricane Katrina.
  • Ida made landfall with 240km/h winds.
  • It has been tied for the strongest landfall in the state by maximum winds with Hurricane Laura in 2020 and the 1856 Last Island hurricane. 
  • Ida was previously deemed “life-threatening”, drawing comparisons to Hurricane Katrina, a 2005 storm that had a path similar to Ida and killed 1,800 people.
  • It has been considered as a category four hurricane – meaning it would cause severe damage to buildings, trees and power lines.

  • It is the ninth named storm, fourth hurricane, and second major hurricane of the 2021 Atlantic hurricane season.

What is a tropical cyclone?

A tropical cyclone is the generic term for a non-frontal synoptic scale low-pressure system over tropical or sub-tropical waters with organized convection (i.e. thunderstorm activity) and definite cyclonic surface wind circulation. 

Favourable conditions for its formation-

  • Sufficiently warm sea surface temperatures (at least 26.5 °C).
  • Atmospheric instability.
  • High humidity in the lower to middle levels of the troposphere.
  • Enough Coriolis force to develop a low-pressure center.
  • A pre-existing low-level focus or disturbance. 
  • Low vertical wind shear.

Different names of Tropical Cyclones

  • The terms “hurricane” and “typhoon” are regionally specific names for a strong “tropical cyclone” hence they are all the same. 
  • It’s just different names given to tropical storms in different parts of the world – hurricane in the Atlantic, typhoon in the Pacific and cyclone in the Indian Ocean. 
  • The World Meteorological Organization (WMO) and the United Nations Economic and Social Commission for Asia and the Pacific (ESCAP) started the tropical cyclone naming system in 2000. 
  • The process of naming cyclones involves several countries in the region and is done under the aegis of the WMO.
  • Cyclones worldwide are named by 9 regions – North Atlantic, Eastern North Pacific, Central North Pacific, Western North Pacific, North Indian Ocean, South West Indian Ocean, Australian, Southern Pacific, South Atlantic.
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Source: BBC
Tags: News PaperPrelims

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