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What has caused the temperature rise of nearly 10 degrees in the Arctic ice caps?
Wiki User
∙ 12y ago
The Arctic temperature has not risen nearly 10 degrees.
Global-mean temperature has increased by 0.6 to 0.9°C (1.1 to 1.6°F) over the last century.
Temperature rise in the Arctic has been almost double that of the rest of the world over the past 100 years. That means an increase of 1.2 to 1.8°C (2.2 to 3.2°F).
There are five reasons why the Arctic is warming faster than the rest of the world:
- The albedo feedback. White snow and ice reflect the heat, so when they melt, the darker surfaces below absorb more heat.
- Cold air holds less water, so radiation in the Arctic immediately heats the air, whereas in the tropics, radiation first has to evaporate the water vapour.
- The colder Arctic means that the atmospheric layer is shallower than in the tropics. So the atmosphere warms up more quickly and warms the near surface air more quickly.
- The ocean is never colder than -2°C and when the sea ice melts warmth moves from the ocean into the atmosphere.
- Global warming is likely to change the circulation patterns in the atmosphere and the oceans, causing more heat to be transferred to the Arctic.
Wiki User
∙ 12y ago
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