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      Long-Term Aridity Changes in the Western United States

      Science
      American Association for the Advancement of Science (AAAS)

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          Abstract

          The western United States is experiencing a severe multiyear drought that is unprecedented in some hydroclimatic records. Using gridded drought reconstructions that cover most of the western United States over the past 1200 years, we show that this drought pales in comparison to an earlier period of elevated aridity and epic drought in AD 900 to 1300, an interval broadly consistent with the Medieval Warm Period. If elevated aridity in the western United States is a natural response to climate warming, then any trend toward warmer temperatures in the future could lead to a serious long-term increase in aridity over western North America.

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          Author and article information

          Journal
          Science
          Science
          American Association for the Advancement of Science (AAAS)
          0036-8075
          1095-9203
          November 05 2004
          November 05 2004
          : 306
          : 5698
          : 1015-1018
          Article
          10.1126/science.1102586
          15472040
          fa35903e-0d22-4a29-b7a0-006d8f0b11bb
          © 2004
          History

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