Growing a forest might sound like a good idea to combat global warming, since trees draw carbon dioxide from the air and release cool water from their leaves. But they also absorb sunlight, warming the air in the process. According to a new study from the Carnegie Institution’s Department of Global Ecology and Lawrence Livermore National Laboratory, planting forests at certain latitudes could make the Earth warmer. Carnegie’s Ken Caldeira will present the work at the American Geophysical Union Fall Meeting in San Francisco on December 7, 2005.
The researchers used complex climate modeling software to simulate changes in forest cover and then examined the effects on global climate. Their results were surprising. “We were hoping to find that growing forests in the United States would help slow global warming,” Caldeira said. “But if we are not careful, growing forests could make global warming even worse.”
Dr. Ken Caldeira | EurekAlert!
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