Humid-Arid Transition

bioclimatic region, United States

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characteristics

  • A map of the states, boundaries, and capital cities of the United States, along with the bodies of water and other counties surrounding the U.S.
    In United States: The Humid–Arid Transition

    East of the Rockies all climatic boundaries are gradational. None, however, is so important or so imperceptibly subtle as the boundary zone that separates the Humid East from the Dry West and that alternates unpredictably between arid and humid conditions from year to…

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