The eastern sides of the Sierra Nevada mountains are much drier than the western sides,and the vegetation is often different;this phenomenon is called the

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The phenomenon of the eastern sides of the Sierra Nevada mountains being drier and having different vegetation is due to the rain shadow effect. As moist air from the Pacific moves eastward and rises over the mountains, it cools and releases precipitation on the western side. As a result, by the time the air reaches the eastern side, it is much drier and has lost much of its moisture, resulting in a rain shadow effect.

The Eastern Sides of the Sierra Nevada Mountains Are Much