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
- Explain: how Arctic sea ice and Antarctic land ice differ in nature and mechanism of melt
- 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 capped by floating sea ice; Antarctica is a continent under an ice sheet, so their melting works through different channels.
Cover
- Contrast: Arctic sea ice floats and barely lifts sea level; Antarctic land ice raises it as it melts and calves.
- Arctic weather: September sea ice falling 12.8% per decade; Arctic air warming over twice the global rate; possible jet-stream effects.
- Antarctic weather and ocean: ice-sheet loss of 155 Gt a year (2006-2015) freshens the Southern Ocean; its sea ice shows no clear trend.
- Arctic activities: new sea lanes, oil, gas and fish, great-power rivalry; thawing permafrost hurts infrastructure and Indigenous life.
- Antarctic activities: sea-level threat to deltas and coastal cities; the Madrid Protocol (1991) keeps the continent for science.
- India's stake: long coastline, monsoon links, Maitri (1989) and Himadri (2008) research stations.
Close with · For a coastal, monsoon-dependent India, polar science at Himadri, Maitri and Bharati is a matter of national climate security, not distant curiosity.
Add value (verified)
- September Arctic sea ice fell about 12.8% per decade between 1979 and 2018.Special Report on the Ocean and Cryosphere in a Changing Climate: Summary for Policymakers — IPCC ↗“September sea ice reductions are very likely 12.8 ± 2.3% per decade.”
- The Antarctic Ice Sheet lost about 155 Gt a year in 2006-2015, mostly from West Antarctic outlet glaciers.Special Report on the Ocean and Cryosphere in a Changing Climate: Summary for Policymakers — IPCC ↗“In 2006–2015, the Antarctic Ice Sheet lost mass at an average rate of 155 ± 19 Gt yr–1 (0.43 ± 0.05 mm yr–1), mostly due to rapid thinning and retreat of major outlet glaciers draining the West Antarctic Ice Sheet”
- Arctic air warmed more than twice the global average; Arctic sea-ice change may influence mid-latitude weather (medium confidence); Antarctic sea ice showed no significant trend in 1979-2018.Special Report on the Ocean and Cryosphere in a Changing Climate: Summary for Policymakers — IPCC ↗“air temperature likely increased by more than double the global average over the last two decades. Changes in Arctic sea ice have the potential to influence mid-latitude weather ( medium confidence ), but there is low confidence in the detection of this influence for specific weather types. Antarctic sea ice extent overall has had no statistically significant trend (1979–2018)”
- Maitri has operated since 1989; Himadri at Ny-Alesund, Spitsbergen, since 2008.Research Stations in Arctic and Antarctica — PIB, Ministry of Earth Sciences ↗“Maitri station has been in operation since 1989. Indian Arctic station ‘Himadri’ is located at Ny Alesund, Spitsbergen Island, Norway and serves as a hub of Indian scientific investigations since 2008.”
- The Indian Antarctic Bill, 2022 implements the Antarctic Treaty and the Madrid Protocol, signed on 4 October 1991.Parliament passes the Indian Antarctic Bill, 2022 — PIB, Ministry of Earth Sciences ↗“The Protocol on Environmental Protection to the Antarctic Treaty was signed at Madrid on 4th October, 1991”
- Parliament passed the Indian Antarctic Bill, 2022, which aims to rid the Antarctic region of mining and illegal activities and to ensure its de-militarisation.Press Information Bureau, Indian Antarctic Bill, 2022 passed by Parliament ↗“the main aim of the Bill is also to ensure de-militarization of the region along with getting it rid of mining or illegal activities.”
Question: UPSC's CS (Main) 2021, GS Paper I — paper ↗. Approach: Minimalist IAS, checked 16 Oct 2026 (how we verify) — UPSC publishes no model answers. ·
Model answer· 346words · Minimalist IAS
The Arctic is an ocean capped by floating sea ice; Antarctica is a continent buried under an ice sheet. The IPCC's ocean and cryosphere report finds September Arctic sea ice shrinking about 12.8% per decade (1979-2018), while the Antarctic Ice Sheet lost about 155 Gt a year in 2006-2015. The two melts therefore act through different channels.
Different ice, different mechanism
| Feature | Arctic | Antarctic |
|---|---|---|
| Ice type | Floating sea ice | Land-based ice sheet |
| Main effect | Albedo loss, weather shifts | Sea-level rise, ocean change |
| Human stake | Shipping, resources, Indigenous life | Coasts, fisheries, science |
Effects on weather patterns
- Arctic amplification: dark open water absorbs more heat, and Arctic air has warmed more than twice the global average over the last two decades.
- Mid-latitude weather: Arctic sea-ice change may influence mid-latitude weather; the IPCC gives this medium confidence but low confidence for specific events.
- Antarctic and the ocean: meltwater, mostly from thinning West Antarctic outlet glaciers, freshens the Southern Ocean and alters its circulation and heat uptake.
- Sea-ice contrast: Antarctic sea ice showed no significant trend over 1979-2018, so Antarctica's signal comes mainly through land ice and the sea.
Effects on human activities
- Arctic opening: longer ice-free seasons open shipping lanes along Russia's northern coast and access to oil, gas and fish, sharpening great-power rivalry.
- Arctic costs: thawing permafrost damages roads, pipelines and homes, and Indigenous hunting cultures lose their ice.
- Antarctic and coasts: ice-sheet loss raises sea level, threatening deltas and cities such as Mumbai, Kolkata and Dhaka with flooding and salinity.
- Antarctic governance: the Madrid Protocol, signed on 4 October 1991, protects the continent's environment, and India's Antarctic law aims to keep the continent free of mining and military use.
- India's stake: a long coastline, research at Maitri (since 1989) and Bharati in Antarctica and Himadri (since 2008) at Ny-Alesund, Spitsbergen, and the Indian Antarctic Bill, passed by Parliament in 2022 (since then).
Arctic melt mainly reshapes weather and access; Antarctic melt mainly reshapes the sea. For a coastal, monsoon-dependent India, polar science at Himadri, Maitri and Bharati is a matter of national climate security, not distant curiosity.
Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 16 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.
