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Subject: California being warmed by urbanization Author: larry [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 16:00:20 03/29/07 Thu build it and the heat will come. wonder if the new in thing will be growing grass on your roof. http://today.reuters.com/news/articlenews.aspx?type=domesticNews&storyid=2007-03-28T214507Z_01_N28326235_RTRUKOC_0_US-CALIFORNIA-WARMING.xml&src=rss&rpc=22 LOS ANGELES (Reuters) - Average temperatures across California rose slightly from 1950 to 2000, with the greatest warming coming in the state's big cities and mostly caused by urbanization -- not greenhouse gases -- authors of a study released on Wednesday said. The study found that average temperatures in California rose nearly 2 degrees Fahrenheit (nearly one degree Celsius) in the second half of the 20th century, led by large urban centers such as San Francisco and Southern California. "Everybody's talking about the carbon coming out of the SUV exhaust or the coal plant, but in the past 50 years in California the bigger impact has been urbanization and suburbanization," said Bill Patzert of NASA's Jet Propulsion Laboratory, one of the study's authors. Reuters Pictures Editors Choice: Best pictures from the last 24 hours. View Slideshow "Exhaust from the SUV is just piling on," he said. "One is heating you from above, the other is heating you from below." Data from the study showed that minimum temperatures, which typically occur at night, also increased more than daytime maximum temperatures, Patzert said, adding: "This is primarily due to increased urbanization, not increases in cloudiness or precipitation." Urbanized areas do not cool at night as well as land in its natural state, he said. The study, which was conducted by Patzert along with a California State University, Los Angeles, geography professor and a graduate student, analyzed data from 330 weather stations across the state from 1950 to 2000. Continued... [ Next Thread | Previous Thread | Next Message | Previous Message ]