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Cyclone Remal UPSC NOTE

 Why in news

  • Cyclonic storm “Remal”, originating in the central Bay of Bengal, is expected to intensify into a severe cyclonic storm 

  • According to the latest input of the India Meteorological Department (IMD), the storm is likely to cross the coast between Sagar Island of West Bengal and Khepupara of Bangladesh with a wind speed of 110-120 kmph, gusting to 135 kmph.

Cyclone Remal

  • The name 'Remal' in the list of tropical cyclones is given by Oman

  • It will be the first cyclone to hit the region this 2024 pre-monsoon season.

  • 'Remal,' meaning 'sand' in Arabic.

  • Origin: Bay of Bengal (BoB).

Factors Contributing to the Formation:

  • A depression (an area of low pressure characterised by circulating winds and atmospheric instability) has formed over the central Bay of Bengal, serving as the genesis for Cyclone Remal.

  • The Bay of Bengal, experiences water temperatures higher(2–3°C) warmer than average

  • This warm water provides the energy needed for cyclones to form and intensify.

  • The Madden Julian Oscillation, a band of clouds moving eastward, along with the winds and warm ocean waters, is currently moving south of the Bay of Bengal. 

  • These winds play a role in initiating cyclones due to their rotational effect.

Occurrence of tropical cyclones on the eastern coast of India

  • The Bay of Bengal experiences more cyclones than the Arabian Sea by a ratio of about 4:1

  • However, a 2022 study found that the frequency of cyclones in the Arabian Sea has increased by 52% from 2001–2019, while the Bay of Bengal’s frequency has slightly decreased.

  • The Bay of Bengal  is relatively shallower than the Arabian Sea The larger surface area of the Bay of Bengal allows faster heating causing higher evaporation

  • Inturn forms a high-pressure zone in the area causing instability in the region

  • All these factors make it suitable for cyclone formation.

  • The Arabian Sea has traditionally seen fewer cyclones due to higher salinity, lower sea surface temperatures, and disadvantageous wind systems.

  • However, changes in ocean and atmosphere warming patterns are leading to more frequent and severe tropical cyclones in the Arabian Sea.

  • The positive phase of the Indian Ocean Dipole (IOD) and human-induced climate change are contributing to the intensification and higher frequency of cyclones in the Arabian Sea.


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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Cyclone Remal UPSC NOTE
Cyclone Remal UPSC NOTE
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