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One of the driest places on Earth is the Atacama. It's a desert, partly due to landforms. For it's so fenced in by the Andes Mountains on one side, and by the Chilean Coast Range on the other, that moisture can't get through either way. The Atacama is a desert, also partly due to patterns of air and water circulation. For the Humboldt current runs all along the Chilean and southern Peruvian coasts. But its cold waters flow northwestward, and away from the coastal range. The same northwestward flow can be said of the anticyclonic air pattern. So circulatory patterns of air and water, and mountain barriers, move moisture away from the Atacama.

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16y ago

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