Text 10325, 101 rader
Skriven 2005-03-26 21:03:08 av Al Jacobs (1:396/17.0)
  Kommentar till text 10266 av John Hull (1:379/1.99)
Ärende: Global Warming
======================
Hello John Hull,


Future Heat Waves: 
More Severe, More Frequent And Longer Lasting

Arlington, Va. -- Heat waves in Chicago, Paris, and elsewhere in 
North America and Europe will become more intense, more frequent 
and longer lasting in the 21st century, according to a new modeling 
study by two scientists at the National Center for Atmospheric 
Research (NCAR) in Boulder, Colo.  In the United States, heat waves 
will become most severe in the West and South.  The findings appear 
in the August 13 issue of the journal Science.

http://www.sciencedaily.com/releases/2004/08/040816090836.htm

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Scientists Find Climate Change is Major Factor in Drought's 
Growing Reach

The percentage of Earth's land area stricken by serious drought 
more than doubled from the 1970s to the early 2000s, according to 
a new analysis by scientists at the National Center for Atmospheric 
Research (NCAR) in Boulder, Colo.  Widespread drying occurred 
over much of Europe and Asia, Canada, western and southern Africa, 
and eastern Australia. Rising global temperatures appear to be a 
major factor, says NCAR scientist Aiguo Dai.

Dai will present the new findings on Wed., Jan. 12th at the American
Meteorological Society (AMS) annual meeting in San Diego, Calif.  
The work also appeared in a paper published in the December issue 
of the Journal of Hydrometeorology; co-authors are NCAR's Kevin 
Trenberth and Taotao Qian.

The study was supported by the National Science Foundation (NSF),
NCAR's primary sponsor.  "The results reconfirm the complexity of 
the climate system," says Cliff Jacobs, program director in NSF's 
division of atmospheric sciences.  "We need to continue to develop 
a wide variety of research tools to understand these changes."

Dai and colleagues found that the fraction of global land experiencing
very dry conditions rose from about 10-15 percent in the early 1970s
to about 30 percent by 2002.  Almost half of that change is due to
rising temperatures rather than decreases in rainfall or snowfall,
according to Dai.

"These results point to increased risk of droughts as human activity
contributes to global warming," says Dai.

http://www.nsf.gov/news/news_summ.jsp?cntn_id=100710

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Modest Climate Change Could Lead To Substantially More 
And Larger Fires

The area burned by wildfires in 11 Western states could double 
by the end of the century if summer climate warms by slightly 
more than a degree and a half, say researchers with the U.S. 
Department of Agriculture Forest Service and Pacific Northwest 
Climate Impacts Group at the University of Washington.

http://www.sciencedaily.com/releases/2004/09/040901091106.htm

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More Smog?

Exploring The Link Between Climate Change And Air Quality

Research has shown that VOC (volatile organic compounds) emissions 
increase by 15% to 25% with every 1 degree Celsius (1.8 degree 
Fahrenheit) temperature increase, potentially leading to more smog. 

When natural vegetation is cleared to make room for plantations of 
fast-growing trees, such as poplars, VOC emissions can increase 
as much as 20 times.

http://www.sciencedaily.com/releases/2003/10/031015032247.htm

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Evidence For The Impact Of Climate Change On Deep-sea
Biodiversity

very minor temperature shifts in deep-water masses can rapidly 
and significantly alter both structural and functional deep-sea 
biodiversity.

http://www.sciencedaily.com/releases/2004/08/040820082741.htm

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..

--- Maximus 3.01
 * Origin: New Orleans P.C. Club (1:396/17)