How do the melting of the Arctic ice and glaciers of the Antarctic differently affect the weather patterns and human activities on the Earth ? Explain.
Approach · directive: “how / explain”
What it asks · Contrast Arctic melt (floating sea ice, strong weather feedbacks) with Antarctic melt (land ice and shelves, sea-level and ocean change), and link each to human activities.
It asks 3 things — answer each
- Contrast the two: type of ice and mechanism of melt in the Arctic and the Antarctic
- Explain how each differently affects weather patterns
- Explain how each differently affects human activities, including India's stake
Open with · The Arctic is an ocean covered by floating ice, while Antarctica is a continent under a thick ice sheet, so their melting works through different mechanisms.
Cover
- Type of ice: melting Arctic sea ice floats and barely lifts sea level; Antarctic (and Greenland) land ice raises it.
- Arctic weather: losing bright ice cuts reflectivity and speeds warming (Arctic amplification), which may weaken the jet stream and feed mid-latitude cold spells and heatwaves.
- Antarctic weather and ocean: meltwater and shrinking ice shelves alter Southern Ocean circulation; shifting westerlies can affect rainfall in southern Australia, Chile and South Africa.
- Sea level: Antarctic and Greenland ice loss threatens coastal cities, deltas and small islands (Mumbai, Kolkata, Dhaka, Jakarta) with flooding, salt-water intrusion and displacement.
- Arctic activities: new shipping routes (Northern Sea Route), easier oil, gas and mineral access and shifting fisheries, but thawing permafrost damages infrastructure and Indigenous livelihoods.
- Antarctic activities: the Antarctic Treaty system limits use to science, tourism and regulated fishing, and the Madrid Protocol bars mining; melt threatens krill-based food webs.
- India's stake: a long coastline exposed to sea-level rise, possible Arctic links with monsoon variability, and research at Himadri (Svalbard), Maitri and Bharati.
Close with · Arctic melt mainly changes weather and access to northern resources, while Antarctic melt mainly drives sea-level rise and ocean change; both call for emission cuts and cooperative governance.
Question: UPSC's CS (Main) 2021, GS Paper I — paper ↗. Approach: Minimalist IAS, checked 30 Sept 2026 (how we verify) — UPSC publishes no model answers. ·
Model answer · 289 words (UPSC limit 250) · Minimalist IAS
The Arctic is an ocean covered by floating sea ice, while Antarctica is a continent under a thick ice sheet, so their melting works through different mechanisms and with different consequences.
Different ice, different mechanism
- Arctic sea ice floats, so its melting barely raises sea level; Antarctic (and Greenland) land ice adds water to the oceans when it melts or calves, raising sea level.
Effects on weather patterns
- Arctic: loss of bright ice cuts reflectivity and speeds regional warming (Arctic amplification); a weaker temperature contrast with the mid-latitudes may weaken and meander the jet stream, feeding cold spells, heatwaves and stalled weather over Eurasia and North America.
- Antarctic: meltwater freshens the Southern Ocean and shrinking ice shelves alter its circulation; shifting westerlies can change rainfall over southern Australia, Chile and South Africa; the wider effect runs through sea level and ocean heat rather than daily weather.
Effects on human activities
- Arctic: new shipping lanes such as the Northern Sea Route, easier access to oil, gas and minerals and shifting fisheries; but thawing permafrost damages roads, pipelines and buildings, Indigenous livelihoods suffer, and great-power competition grows.
- Antarctic: sea-level rise threatens coastal cities, deltas and small islands — Mumbai, Kolkata, Dhaka, Jakarta — with flooding, salt-water intrusion and displacement; the Antarctic Treaty system limits activity to science, tourism and regulated fishing, and the Madrid Protocol bars mining, while melt endangers krill-based food webs.
- India's stake: a long, densely settled coastline exposed to sea-level rise, possible links between Arctic change and monsoon variability, and research at Himadri (Svalbard), Maitri and Bharati.
Arctic melt mainly changes weather and opens the north to use and rivalry, while Antarctic melt mainly drives sea-level rise and ocean change; both demand emission cuts and cooperative polar governance.
Written by Minimalist IAS from facts checked at source (how we verify) — a little fuller than exam length, so every part of the question is covered; in the hall, keep the structure and trim the detail. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.