Q18 · UPSC Civil Services Mains 2015 · GS I · 12 marks · 3 min read

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How far do you agree that the behaviour of the Indian monsoon has been changing due to humanizing landscape? Discuss.

Topic: Geophysical Phenomena. Syllabus: Important Geophysical phenomena such as earthquakes, tsunami, volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes. Same official PYQ from year-wise 2015 and Geophysical Phenomena.

Revision summary

The monsoon is still an ocean–continent wind system at heart. Deforestation, irrigation, cities, and aerosols change local rain, onset, and extremes. Urban heat can mean heavier short storms; sealed soil turns them into floods. El Niño, the Indian Ocean, and greenhouse warming remain major controls. Agree in part: humans reshape monsoon behaviour, they do not solely own it.

Model answer

Copper italics in this answer — like this — are the key facts. Each one is unpacked in the Facts & figures rail.

Introduction

The Indian monsoon is a giant seasonal wind and rain system driven by land–sea heat contrast, the Himalaya, and the tropical oceans. Humans have cut forests, spread farms and irrigation, paved cities, and filled the air with dust and smoke. Those landscape and aerosol changes do nudge monsoon rain, but they do not replace El Niño, the Indian Ocean, and global warming as the big controls.

Body

What “humanizing the landscape” means

  • It means replacing forest and wetland with fields, canals, mines, and cities, and adding heat, dust, and black carbon from fires and engines.
  • Irrigation in the Indo-Gangetic plain and parts of the peninsula puts extra moisture and changes local heat, which can alter local storms even if the monsoon jet is set far away.

Ways the monsoon’s behaviour can change

  • Deforestation of the Western Ghats and northeast hills reduces orographic lift and local recycling of moisture, which can cut or shift rainfall on the windward slopes.
  • Urban heat islands over Delhi, Mumbai, and other cities can trigger more intense local downpours and lightning, a change in the character of rain more than in the seasonal total.
  • Aerosols from industry, vehicles, and biomass can dim sunlight, change cloud droplets, and delay or weaken monsoon onset in some studies, which is a human atmospheric landscape as well as a ground one.
  • Large irrigation and reservoir belts may modestly cool or moisten regional climate; the signal is debated but is a plausible human land-surface effect.
  • Breaks, floods, and a rise in extreme rain events fit a warmer atmosphere that holds more moisture; land-use change can make those extremes hit harder through runoff on sealed soil.

How far one should agree

  • Agree that local and regional monsoon rain, especially extremes and urban storms, is being reshaped by land cover, dust, and smoke.
  • Do not agree that the monsoon “belongs” to landscape change alone: sea-surface temperatures, El Niño–Southern Oscillation, the Indian Ocean Dipole, and Himalayan snow still set much of the year-to-year drama.
  • Global warming from greenhouse gases is a human cause that works through ocean and air, not only through the look of the village map.
  • Data are mixed on whether total all-India summer rainfall has a simple downward trend; the clearer change is in variability, dry spells, and heavy bursts.

Way forward

  • Restore Ghats and catchment forests, cut aerosols, and plan cities for cloudbursts, while still watching the Pacific and Indian Oceans in the forecast.

Flow diagram

flowchart TD
  L[Forest to farm city irrigation] --> M[Local monsoon rain]
  A[Aerosols heat islands] --> M
  O[ENSO IOD ocean heat] --> M
  G[Global warming] --> M
  M --> V[More extremes variable spells]

Conclusion

Humanized landscapes have changed how monsoon rain falls on the ground—more bursts, more urban storms, some local drying after forest loss, and aerosol effects on clouds. That is a real but partial story. The monsoon’s large behaviour still answers to oceans and a warming planet. The fair agreement is “yes, in part, and growing,” not “the monsoon is now only a land-use product.”

Quick related

Students also ask

  • Has the monsoon stopped because of cities and farms?

    No. It still arrives as a large seasonal system. Humans have changed its local punch and some of its reliability.

  • Is landscape change more important than El Niño?

    For a single all-India drought year, the ocean often dominates. For urban floods and Ghats rainfall, land and aerosols matter more.

Same topic · past papers

UPSC has asked this before

These previous-year questions sit on the same topic. Open one to practise the earlier ask.

  1. 2016 · Q18 · GS I · 12 marks

    Present an account of the Indus Water Treaty and examine its ecological, economic and political implications in the context of changing bilateral relations.

    View answer →

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