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Cities Warming Faster Than Rural Areas Across U.S.

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  • Mike Neuman
    As reported in the April issue of the journal Environmental Health Perspectives (Vol. 111, No. 4), U.S. cities average 10 more hot summer nights --
    Message 1 of 1 , Jun 5, 2003
      As reported in the April issue of the journal "Environmental Health
      Perspectives" (Vol. 111, No. 4), U.S. cities average 10 more hot
      summer nights -- classified as above 70 degrees F in the East, South,
      and Midwest, and above 80 degrees F in the Southwest -- than they did
      40 years ago. Nationwide in the U.S., there has been a 300% greater
      rate of warming in cities than in the rural countryside, according to
      a study by Arthur DeGaetano, associate professor of Earth and
      atmospheric sciences at Cornell University, and Robert J. Allen, then
      a research support specialist at the university.

      The study, which originally appeared in the November 2002 issue of the
      "Journal of Climate", analyzed historical data on daily high and low
      temperatures from 361 weather stations across the United States from
      1910 to 1996, adjusting for omissions, differences in observation
      times and other discontinuities, and using the hottest 10%, 5%, and
      1% of all the daily high or low temperatures recorded by a station
      over its period of operation.

      For the period 1960-1996, the pair found that 75% of stations showed
      an average increase in both hot summer days and hot summer nights.
      The rate of warming was greatest in the East and least in the central
      section. The results also showed that cities are warming at more than
      triple the rate of rural locales.


      "The ultimate test of man's conscience may be his willingness to
      sacrifice something today for future generations whose words of thanks
      will not be heard."
      - Gaylord Nelson, Earth Day founder
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