Revision summary
Snow and sea ice raise planetary albedo and keep the energy budget cooler. Loss of ice darkens the surface and adds a warming feedback. Ice sheets control sea level; glaciers control seasonal river water. Freshwater input can alter ocean circulation. Permafrost thaw can release greenhouse gases and extend the warming.
Model answer
Flow diagram
flowchart TD CR[Cryosphere] --> A[High albedo] CR --> SL[Ice sheets sea level] CR --> C[Permafrost carbon] A --> G[Global climate] SL --> G C --> G
Conclusion
- Treat the cryosphere as both a thermometer and an engine: it records warming and it drives further warming through albedo and carbon.
- Link polar ice, Himalayan snow, and permafrost in one answer so global climate is not reduced to Arctic sea ice alone.
The cryosphere cools the planet by reflecting light, stores carbon in frozen ground, and sets the long-term water level of the oceans. As it shrinks, those controls weaken, so global climate becomes warmer, wetter in some belts, and more unstable at the coasts.
Quick related
Students also ask
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"The Himalayas are highly prone to landslides."Discuss the causes and suggest suitable measures of mitigation.
Next question on this syllabus topic (2016 · Q14). View answer →
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Does melting sea ice raise sea level?
Floating sea ice already displaces water. Its melt does not raise global sea level the way land ice sheets do.
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Is the cryosphere only at the poles?
No. High mountains, seasonal snow, and permafrost at high latitudes and altitudes are all part of it.
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