I have a few vague ideas about why this may be happening – but I have yet to find a straightforward explanation for it in the literature. The GCM models have predicted that warming should be more dramatic around the poles, but again, what would cause this?
What is causing polar areas to warm faster than other areas of the Earth, if CO2 levels are rising uniformly ?
Posted by Admin on September 29th, 2010
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The first answer is precisely wrong. In fact, the "vast bright whiteness" means that snow (like clouds) have a high albedo – that is, they efficiently reflect solar radiation back into space, and thus reduce the amount of warming that occurs. However, in the case of the poles, warming melts sea ice and leaves dark water behind, which has a very LOW alebdo. So the more warming you get, the more ice melts, the lower the albedo, the more warming you get, etc. A positive feedback loop, resulting in much faster warming in the poles than elsewhere.
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