climateprogress.org - 1/23/2009
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Contrary to the popular notion that increases in carbon dioxide emissions increase vegetation, a “stunningly important paper,” in Science finds the reverse has been true.
Led by scientists from the US Geological Survey and USDA, “ Widespread Increase of Tree Mortality ...
news.bbc.co.uk - 1/23/2009
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news.bbc.co.uk —
BBC: Old growth trees in western parts of
the US are probably being killed as a result...
of regional changes to the climate, a study has suggested. Analysis of undisturbed forests showed that the trees' mortality rate had doubled since 1955, researchers ...
(more)
Climate shift 'killing US trees'
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New study concludes global warming is killing U.S. trees, a dangerous carbon-cycle feedback
Green Home Huddler —
... across elevations, tree sizes, dominant genera, and past fire histories. Forest density and basal area declined slightly, which suggests that increasing mortality was not caused by endogenous increases in competition. Because mortality increased in small trees, the overall increase in mortality rates cannot be attributed solely to aging of large trees. Regional warming and consequent increases in water deficits are likely contributors to the increases in tree mortality rates. " As discussed on Climate Progress , this creates another potential CO2 feedback. As regional warming ...
Feed a loop, starve a planet
Grist - the Latest from Grist —
... climates are all contributing to the rising number of fires linked to climate change. Across large swaths of the United States and Canada, bark beetles have killed many mature trees, making forests more flammable. And tropical rain forests that were not susceptible to forest fires in the past are likely to become drier as temperatures rise, growing more vulnerable. [See "Science: Global warming is killing U.S. trees, a dangerous carbon-cycle feedback," here.] Preventing deforestation in the tropics is more important than in ...
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How Green Is My Orange? —
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PepsiCo calculated that the equivalent of 3.75 pounds of carbon dioxide are emitted to the atmosphere for each half-gallon carton of orange juice. >
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