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IIT-Delhi Study Finds Human Activity Drives Extreme Rainfall in India’s Monsoon Zone

Target:UPSC GS-IIIMPSCSSC GATeachingPrelims HighMains MediumStatic GK Link
17 Jun 2026
~2 min
Source: The Hindu
Key Data:1905-2014West Central India
Bodies:IIT-DelhiKSMDB College
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What This Article Covers

1.First-ever 'fingerprinting' study from IIT-Delhi and KSMDB College provides dispositive evidence that human activity is the primary driver of extreme rainfall in India.

2.Analysis of 110 years (1905-2014) of rainfall data used computer models to separate natural cycles like El Niño from human-caused changes.

3.West Central India's core monsoon zone shows clear evidence that greenhouse gas warming is intensifying extreme precipitation.

The Big Picture
Prelims · HighMains · Medium

A landmark IIT-Delhi study provides the first 'smoking gun' evidence that human activity, not natural variation, is driving extreme rainfall and violent floods in India. This challenges the old assumption that historical rainfall data can predict future risks, with major implications for urban planning and disaster management.

Exam Lens

Quick Exam Facts From News

Study Period1905 to 2014
Key RegionWest Central India (core monsoon zone)
Method UsedFingerprinting (climate model comparison)
Key Drivers IdentifiedGreenhouse gases (warming) vs Aerosols (cooling/suppressing)

1-Minute Revision

  • ›Study Period: 1905 to 2014
  • ›Key Region: West Central India (core monsoon zone)
  • ›Target this Data: Study period: 1905-2014
  • ›Target this Nodal Body: IIT-Delhi (Centre for Atmospheric Sciences) and KSMDB College, Kollam
  • ›Target this Legal Point: No legal provision mentioned, but 'Environmental Research Letters' journal name

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Q1Static LinkageEasy

Which institution conducted the study on human activity driving extreme rainfall in India?

Q2Statement-basedHard

Consider the following statements:

1. The study used a technique called 'fingerprinting' to separate natural weather cycles from human-caused changes.

2. The study analysed rainfall data from 1905 to 2014.

3. The study found that aerosols from pollution have a warming effect on the atmosphere.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the study, which region of India showed the clearest evidence that greenhouse gas forcing is driving extreme precipitation intensification?

Q4Application/ImpactMedium

What is the primary implication of the study's finding for urban planners in India?

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