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How does the location of Portland, Oregon help explain why it receives more rainfall than Alice Springs, Australia?

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Portland OR is on the west coast, with high mountains surrounding it. The prevailing wind is west to east, and orographic compression makes the rainfall heavy. Alice Springs AU is in the middle of a semiarid desert, with no significant terrain features. At one time, it was at the bottom of an inland sea. Without significant humidity or compression, rain does not fall on Alice Springs.

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Thanks SO much! :)
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Portland's in a rainforest and Alice Springs, a desert (I believe).

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Oregon is a rainforest ?
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Yes, lol. I didn't know that either. I read it in a book a few years ago, and then did some digging with my daughter for a project. It does make sense if you think about it. It's one of the reasons the Cullens chose Forks in the Twilight series. The lack of sunny days was a major bonus to them. :)

It's "official" moniker is the Pacific Northwest temperate region. There's even a rainforest National Park up there. It's called the Hoh Rainforest. http://www.nps.gov/olym/planyourvisit/visiting-the-hoh.htm
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Emynor

Because Alice Springs is not in Oregon, and Portland is not in Australia.

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