Rain-shadow deserts form on the dry lee side of mountain walls
Moist air rises over a mountain range, cools, and drops rain on the windward slope; descending air on the lee side warms and dries, leaving a rain-shadow desert.
That orographic trap explains many arid belts tucked against high cordilleras far from any ocean stereotype of “desert.”
Mountains make drought next door to green. Rain shadows show climate zones can flip within a day’s walk.
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