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Global warming and wildfires: Senate hearing today at 3:00 p.m.Senate testimony on yet another example of climate amplifying feedbacksPosted by Joseph Romm (Guest Contributor) at 1:13 PM on 24 Sep 2007
I'm looking forward to this hearing since one of the witnesses is Dr. Thomas Swetnam, Director of the Laboratory of Tree Ring Research and Professor of Dendochronology, University of Arizona. He coathored the August 2006 Science cover story, "Warming and Earlier Spring Increase Western U.S. Forest Wildfire Activity" ($ub. req'd). The abstract is viewable online -- here is the conclusion: These results have important regional and global implications. Whether the changes observed in western hydroclimate and wildfire are the result of greenhouse gas-induced global warming or only an unusual natural fluctuation is beyond the scope of this work. Regardless of past trends, virtually all climate-model projections indicate that warmer springs and summers will occur over the region in coming decades. These trends will reinforce the tendency toward early spring snowmelt and longer fire seasons. This will accentuate conditions favorable to the occurrence of large wildfires, amplifying the vulnerability the region has experienced since the mid-1980s. The Intergovernmental Panel on Climate Change's consensus range of 1.5° to 5.8°C projected global surface temperature warming by the end of the 21st century is considerably larger than the recent warming of less than 0.9°C observed in spring and summer during recent decades over the western region. We are running out of time to stop these feedbacks from intensifying. This post was created for ClimateProgress.org, a project of the Center for American Progress Action Fund.
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