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Tropical forest sustainability: A climate change boon
Date:6/13/2008

rry the risk that events such as bushfires and insect outbreaks can release massive amounts of sequestered carbon back into the atmosphere.

"Since 2000, for example, increases in the areas of Canada's forests affected by bush fires and insect outbreaks have transformed them from a 'CO2 sink' to a 'CO2 source' a situation which is expected to continue for the next 20-30 years," Dr Canadell says.

"Forests also affect biophysical properties of the land surface, such as sunlight reflectivity and evaporation, and that climate models suggest large reforestation programs in the boreal (colder) regions of the word could have limited benefits due to the replacement of large areas of reflective snow with dark forest canopies.

"Conversely, the climate benefits of reforestation in the tropics are enhanced by positive biophysical changes such as cloud formation which further reflect sunlight," he says.


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Contact: Dr. Pep Canadell
Pep.Canadell@csiro.au
61-262-465-631
CSIRO Australia
Source:Eurekalert

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