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NASA: Danger Point Closer Than Thought From Warming
'Disastrous Effects' of Global Warming Tipping Points Near, According to New Study
By BILL BLAKEMORE
May 29, 2007 —
Even "moderate additional" greenhouse emissions are likely to push Earth past "critical tipping points" with "dangerous consequences for the planet," according to research conducted by NASA and the Columbia University Earth Institute.
With just 10 more years of "business as usual" emissions from the burning of coal, oil and gas, says the NASA/Columbia paper, "it becomes impractical" to avoid "disastrous effects."
The study appears in the journal Atmospheric Chemistry and Physics. Its lead author is James Hansen, director of NASA's Goddard Institute for Space Studies in New York.
The forecast effects include "increasingly rapid sea-level rise, increased frequency of droughts and floods, and increased stress on wildlife and plants due to rapidly shifting climate zones," according to the NASA announcement.
Recent Climate Reports Underestimated How Soon
By heralding the new research paper, NASA is endorsing science that places considerably more urgency on the need to reduce emissions to avoid "disastrous effects" of global warming than was evident in the recent reports from the world's scientists coordinated by the Intergovernmental Panel on Climate Change.
The new NASA release emphasizes the danger of "strong amplifying feedbacks" pushing Earth past "dangerous tipping points."
Scientists have been warning for several years that such tipping points are the greatest threat from manmade global warming and what makes it potentially catastrophic for civilization.
'Potentially Uncontrollable' Feedback Loops
As the tipping points pass, "there is an acceleration, potentially uncontrollable, of emissions of vast natural stores of greenhouse gas," according to Hansen, who reviewed the study for ABC News today.
Hansen explains that dangerous feedback loops are being tracked in various regions of the planet.
Many studies have reported feedback loops already observed in thawing tundra, seabeds and drying forests.
Hansen also points out that dark and therefore heat-absorbing forests are now expanding toward the Arctic ..full text
'Disastrous Effects' of Global Warming Tipping Points Near, According to New Study
By BILL BLAKEMORE
May 29, 2007 —Even "moderate additional" greenhouse emissions are likely to push Earth past "critical tipping points" with "dangerous consequences for the planet," according to research conducted by NASA and the Columbia University Earth Institute.
With just 10 more years of "business as usual" emissions from the burning of coal, oil and gas, says the NASA/Columbia paper, "it becomes impractical" to avoid "disastrous effects."
The study appears in the journal Atmospheric Chemistry and Physics. Its lead author is James Hansen, director of NASA's Goddard Institute for Space Studies in New York.
The forecast effects include "increasingly rapid sea-level rise, increased frequency of droughts and floods, and increased stress on wildlife and plants due to rapidly shifting climate zones," according to the NASA announcement.
Recent Climate Reports Underestimated How Soon
By heralding the new research paper, NASA is endorsing science that places considerably more urgency on the need to reduce emissions to avoid "disastrous effects" of global warming than was evident in the recent reports from the world's scientists coordinated by the Intergovernmental Panel on Climate Change.
The new NASA release emphasizes the danger of "strong amplifying feedbacks" pushing Earth past "dangerous tipping points."
Scientists have been warning for several years that such tipping points are the greatest threat from manmade global warming and what makes it potentially catastrophic for civilization.
'Potentially Uncontrollable' Feedback Loops
As the tipping points pass, "there is an acceleration, potentially uncontrollable, of emissions of vast natural stores of greenhouse gas," according to Hansen, who reviewed the study for ABC News today.
Hansen explains that dangerous feedback loops are being tracked in various regions of the planet.
Many studies have reported feedback loops already observed in thawing tundra, seabeds and drying forests.
Hansen also points out that dark and therefore heat-absorbing forests are now expanding toward the Arctic ..full text
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