In yet another case of the uncertainty of the science surrounding planetary environment, it appears this conjecture may be a tad cloudy, or smoky, as the case may be.
'Green' storage in forests may be going up in smoke
Study: Wildfires emit more global warming gases than thought
By Tom Knudson - tknudson@sacbee.com
Published 5:59 am PDT Wednesday, March 12, 2008
A new study has found that California wildfires emit more greenhouse gases than previously believed largely through the post-fire decay of dead wood, a finding that is raising questions about how effective the state's forests are at storing carbon and slowing global warming.
The study by Thomas Bonnicksen, a retired forestry professor at Texas A&M University, found that four major wildfires – from the Fountain fire near Redding in 1992 to the Angora blaze at Lake Tahoe last year – are responsible for the release of 38 million tons of greenhouse gases into the atmosphere, far more than the 2 million tons the state estimates that fires produce on average each year.
"Up until now, we have not fully appreciated the magnitude of the impact of wildfires on climate change," Bonnicksen said. "This is a very important part of the problem."
His study, which is not peer-reviewed and has been found lacking by some, is one of a flurry of reports that have begun to explore the critical role that forests play in regulating carbon dioxide, the principal atmospheric gas responsible for global warming. Traditionally, forests have been viewed as green reservoirs of landlocked carbon, soaking up and storing CO 2 from the atmosphere in their leaves, needles, roots and soil.
Bonnicksen's study casts that view into question. Forests today are so overcrowded with spindly, unhealthy trees – partly the result of decades of fire suppression – that as they burn and decay they are turning into an actual source of greenhouse gas pollution.
