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I agree we don't know for sure, since we don't know the role of airborne or ground mositure in the last few million years. But, anecdotally, I have a few friends who fly to China from Finland regularly and all report increasing evidence of major fires during recent summers.

*Fire, Climate Change, and Carbon Cycling in the Boreal Forest edited by Eric Kasishke

*The Role of Fire in Northern Circumpolar Ecosystems (SCOPE Report) by Ross W. Wein

*Fire in Ecosystems of Boreal Eurasia (Forestry Sciences) by Johann Georg Goldammer

*Global Biomass Burning: Atmospheric, Climatic, and Biospheric Implications by Joel S. Levine

You can't be me, I'm taken

by Sven Triloqvist on Thu Jan 3rd, 2008 at 07:34:50 AM EST
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Yes, but burning releases CO2. unlocking permafrost methane or clathrate releases, well, methane, which more abundant in those fossil reservoirs than burnable biomass on the surface, and also methane has 20x more efficient greenhouse effect. So it super-spike in atmospheric methane would be a near-extinction-of-life event. The fossil records show these happened many times, some of these possibly triggered by methane or sulfur releases (from volcanoes). But in the last few million years (where ice cores give us methane ppm), we know there has been no super-spike in methane, despite a few episodes of significantly warmer-than-present temperatures.

Pierre
by Pierre on Thu Jan 3rd, 2008 at 08:38:19 AM EST
[ Parent ]

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