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Cyclones Arnab and Murasu; climate study on Arnab

6 November 2026 · ⏱ 2 நிமிடம் · GS1/GS3 Disaster management, Climate

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ஏன் செய்தியில்?

A Tamil war drum is a cyclone name: how North Indian Ocean storms get named

Climate change worsened Cyclone Arnab's impact.

Why it matters: general awareness

Cyclones Arnab and Murasu; climate study on Arnab
NOAA · Public domain · Wikimedia Commons
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What you need to know

2 நிமிடம்

Cyclone names in the North Indian Ocean come from a pre-agreed list; India proposed Murasu, a Tamil war drum.

A study found climate change raised Cyclone Arnab's maximum wind speed by about 5 per cent and its eyewall rainfall rate by 11 per cent at landfall, increasing damage by 33 per cent.

ஆதாரங்கள்: Topper IAS editorial (PIB / The Hindu / Indian Express)

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முக்கிய உண்மைகள்

Remember these

  • North Indian Ocean cyclone names come from a pre-agreed list of names proposed by member countries
  • India proposed the name Murasu, a Tamil war drum
  • Attribution study: climate change raised Cyclone Arnab's maximum wind speed by about 5 per cent at landfall
  • Eyewall rainfall rate rose by about 11 per cent, and damage increased by about 33 per cent
  • IMD's New Delhi centre is the WMO-designated Regional Specialised Meteorological Centre for the region
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ப்ரிலிம்ஸ் · மெயின்ஸ்

How the exam will ask it

ப்ரிலிம்ஸ்

  • Cyclones in the North Indian Ocean are named from a list agreed in advance by the countries of the region, not chosen freely by the country hit.
  • Climate attribution studies estimate how much human-caused warming changed a specific event's intensity, rainfall or damage.
  • The eyewall is the ring of the most intense winds and rainfall around the cyclone's centre.

மெயின்ஸ்

GS1/GS3 Disaster management and climate: attribution studies such as the one on Cyclone Arnab show warming strengthens winds and rainfall, raising damage far more than the wind increase alone (about 5 per cent wind, about 33 per cent damage). Policy links include early warning by IMD, coastal infrastructure standards and NDMA guidelines. Way forward: climate-resilient coastal planning, better forecasting of rapid intensification and loss-and-damage financing.

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