Sun, snow, temperatures around the freezing point make for interesting lessons in thermodynamics this time of year. The most interesting, for me, is how snow melts more quickly on west-facing slopes than east-facing slopes. I think it has to do with the interaction between warmer afternoon temperatures, and the more direct angle of the sun on west-facing slopes in the afternoon. Snow darkens before it melts. Places where snow is disappearing remind me of the coat of an appaloosa.
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