At first I thought maybe it would be like having a torch in a freezer but nope there would be a temp difference. So because it’s 5 f degrees outside with a -5 below 0 windchill how is it snow and ice are melting?
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For the same reason water in the ocean becomes vapor and then clouds without the oceans boiling away. The sun is warm enough to make small amounts of water on the very surface become lighter than air and rise.
Same thing with ice. The sun is warm enough to heat up tiny layers of snow and ice on the very surface even if the sun is not heating up the whole entire atmosphere in the region where you live.
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