United States:


The United States has a broad range of climates, varying from the tropical rain-forest of Hawaii and the tropical savanna of S Florida (where the Everglades are found) to the subarctic and tundra climates of Alaska. East of the 100th meridian (the general dividing line between the dry and humid climates) are the humid subtropical climate of SE United States and the humid continental climate of NE United States. Extensive forests are found in both these regions. West of the 100th meridian are the steppe climate and the grasslands of the Great Plains; trees are found along the water courses.

In the SW United States are the deserts of the basin and range province, with the hottest and driest spots in the United States. Along the Pacific coast are the Mediterranean-type climate of S California and, extending north into SE Alaska, the marine West Coast climate. The Pacific Northwest is one of the wettest parts of the United States and is densely forested. The Rocky Mts., Cascades, and Sierra Nevada have typical highland climates and are also heavily forested. In addition to the Grand Canyon in Arizona and Great Salt Lake in Utah, widely publicized geographic marvels of the United States include Niagara Falls, on the New York–Canada border; the pink cliffs of Bryce Canyon National Park, in Utah; and the geysers of Yellowstone National Park, primarily in Wyoming (for others, see National Parks and Monuments, table).

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The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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