Key Terms
- Albedo — proportion of solar radiation reflected; ice ~0.9, ocean ~0.06
- Positive feedback — effect amplifies original cause; accelerates change
- Arctic amplification — Arctic warms 2–4× faster than global average
- Permafrost — ground frozen for 2+ consecutive years; ~15 million km² Northern Hemisphere
- Madrid Protocol (1991) — bans Antarctic mineral extraction until 2048
- CCAMLR — manages Southern Ocean fishing; agreed Ross Sea MPA
- MPA — Marine Protected Area; restricts fishing/mining to protect ecosystems
- Northwest Passage — Arctic sea route saving ~9,000 km vs Panama Canal; ice-free 2007
Key Threats
- Climate change: Arctic +3°C since pre-industrial; ice -13%/decade since 1979
- Albedo feedback loop: ice → ocean = less reflection → more warming
- Permafrost thaw: CH₄ release (28× CO₂ power over 100 years)
- Thwaites Glacier: losing 50 billion tonnes/year; WAIS collapse = 3.3m sea level rise
- Oil spills: Exxon Valdez 1989 — 40M litres; 2,000 km coastline; 30+ years recovery
- Tourism: 74,000 Antarctic visitors (2022–23); disturbance, introduced species, soot
- Over-fishing: Grand Banks cod collapse 1992; krill exploitation threat
Key Management
- Antarctic Treaty (1959): 54 signatories; bans military, nuclear, territorial claims
- Madrid Protocol (1991): mineral extraction banned until 2048; "natural reserve"
- CCAMLR (1982): ecosystem-based fishing quotas; Southern Ocean
- Ross Sea MPA (2016): 1.55 million km²; 72% restricted; 35-year term
- Arctic Council (1996): 8 states; non-binding; paralysed since 2022
- Central Arctic Ocean Fisheries Agreement (2021): 16-year high-seas fishing ban
- UNCLOS: governs EEZ and continental shelf claims; overlapping Arctic disputes
Named Examples and Key Dates
- 2007 — Northwest Passage first ice-free; Snøhvit LNG opens
- 2012 — Arctic sea ice record low (3.41 million km²)
- 1989 — Exxon Valdez; Alaska; 40M litres crude oil
- 1992 — Grand Banks cod fishery closed; 40,000 jobs lost
- 1986 — IWC commercial whaling moratorium
- 2016 — Ross Sea MPA (1.55M km², world's largest)
- Snøhvit — Norway; first Arctic offshore LNG; opened 2007
- Prirazlomnaya — Russia; first Arctic shelf oil platform; opened 2013
Common Mistakes
- Saying management agreements fully protect polar regions: The Antarctic Treaty (1959) bans military use and territorial claims, but the Madrid Protocol mineral extraction ban expires in 2048 and requires unanimous consent to extend — management is incomplete and politically fragile
- Ignoring the permafrost methane feedback: Permafrost thaw releases methane (28× more potent than CO₂ over 100 years) — this is a positive feedback loop that accelerates warming beyond what emissions alone would cause; it must feature in climate change evaluation answers
- Treating Arctic and Antarctic management as identical: Antarctica has international treaty governance (Antarctic Treaty System); the Arctic has no equivalent land territory treaty — Arctic governance is weaker and complicated by competing national claims under UNCLOS
- Vague threat statements without evidence: "Polar regions are threatened by climate change" scores nothing at Level 3 — use specific data: Arctic warming 2–4× faster than global average; sea ice declining 13% per decade since 1979; Thwaites Glacier losing 50 billion tonnes per year
This topic summary covers Knowledge Organiser: Threats to Polar Environments and Their Management within Cold Environments: Threats & Management for GCSE Geography. Revise Cold Environments: Threats & Management in Cold Environments for GCSE Geography with 15 exam-style questions and 20 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 16 of 16 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Cold Environments: Threats & Management
What term describes the process where the Arctic is warming approximately twice as fast as the global average?
Explain why the melting of Arctic sea ice leads to further warming. [2 marks]
Quick recall flashcards
How much has Antarctic tourism grown?
From fewer than 5,000 visitors in 1990 to approximately 74,400 in 2019–20 — mostly on cruise ships. This rapid growth threatens fragile ecosystems.
What is the ANWR debate in Alaska?
The Arctic National Wildlife Refuge contains an estimated 7.7 billion barrels of recoverable oil. The debate is whether to drill (economic benefit, energy security) or protect the sensitive ecosystem (caribou, polar bears).