The map of Winter Depression

The map of winter depression
Between the 30th parallels winter depression is almost unknown. Beyond them, rates increase towards the poles. Example: 1% in North Florida increasing to 10% in Alaska (Scientific American Mind, VOL 16, Nr. 3, 2005).
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Alex E

“Maps are like campfires – everyone gathers around them, because they allow people to understand complex issues at a glance, and find agreement about how to help the land.”