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Important Facts For Prelims

Bomb Cyclone

  • 01 Feb 2022
  • 2 min read

For Prelims: Bomb cyclone, Hurricanes, cyclones, typhoons.

For Mains: Cyclones and its formation, Important Geophysical phenomena.

Why in News?

Recently, ‘Bomb cyclone’ hits eastern US, which triggers transport chaos, outages.

What is a Bomb Cyclone?

  • About:
    • A bomb cyclone is a large, intense midlatitude storm that has low pressure at its center, weather fronts and an array of associated weather, from blizzards to severe thunderstorms to heavy precipitation.
    • Bomb cyclones put forecasters on high alert, because they can produce significant harmful impacts.
  • Reasons for the Formation:
    • This can happen when a cold air mass collides with a warm air mass, such as air over warm ocean waters. The formation of this rapidly strengthening weather system is a process called bombogenesis.
    • It occurs when a midlatitude cyclone rapidly intensifies, dropping at least 24 millibars over 24 hours.
      • A millibar measures atmospheric pressure.

How does a Bomb Cyclone differ from a Hurricane?

  • Hurricanes tend to form in tropical areas and are powered by warm seas. For this reason, they’re most common in summer or early fall, when seawater is warmest.
  • Bomb cyclones generally occur during colder months because cyclones occur due to cold and warm air meeting. During the summer, there’s generally not much cold air across the atmosphere; this means a bomb cyclone is much less likely to occur.
  • Hurricanes form in tropical waters, while bomb cyclones form over the northwestern Atlantic, northwestern Pacific and sometimes the Mediterranean Sea.

Source: TH

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