The featured plot charts daily solar radiation (red line) and average 4 inch soil temperatures (black line). Any idea why the black line has been mostly flat for December? The answer is snow! A blanket of snow acts just as that, a blanket. The ground's heat is trapped below and the ground is protected from the cold air above the ground. In fact, the ground remains rather warm which is no surprise for those folks who have been ripping up their yard with the snowplow.

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Tags:   snowcover