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Haze Is Heating Up The Arctic

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  • Pat Neuman
    Haze Is Heating Up The Arctic by Staff Writers Salt Lake City (UPI) May 11, 2006 U.S. scientists in Utah say they have found yet another contributing force to
    Message 1 of 1 , May 11, 2006
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      Haze Is Heating Up The Arctic
      by Staff Writers
      Salt Lake City (UPI) May 11, 2006
      U.S. scientists in Utah say they have found yet another contributing
      force to polar warming: haze. Arctic climate already is known to be
      particularly prone to global warming caused by greenhouse gases.
      Now, a University of Utah study finds the Arctic haze -- consisting
      of particulate pollution from midlatitude cities -- mixes with thin
      clouds, enabling them to become more efficient at trapping heat.
      The effect makes the Arctic up to 3 degrees Fahrenheit warmer during
      polluted, cloudy episodes than it would be if the air was clean,
      concludes the study by Tim Garrett, an assistant professor of
      meteorology, and doctoral student Chuanfeng Zhao.

      Arctic haze has been observed since the Industrial Revolution began
      about 1750.

      Garrett said the particulate pollution modifies clouds so they warm
      the surface. He said the effect is most pronounced during the Arctic
      winter when it is dark and there is no sunlight. That's when the
      Arctic is most polluted because there is almost no precipitation to
      wash out the pollutants, and there also is a strong inversion.

      The study previously appeared in the April 6 issue of the journal
      Nature.


      Source: United Press International

      http://www.terradaily.com/reports/Haze_Is_Heating_Up_The_Arctic.html
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