'It's Already Begun': Scientists Warns of Feedback Loops


Thomas Crowther, professor in the Department of Environmental Systems Science of ETH Zurich:

“It’s already begun. The feedback is in process.” Crowther estimates that carbon dioxide and methane emissions from thawing soils are “accelerating climate change about 12 to 15 percent at the moment,” and said past IPCC reports that left out the feedback “were way more optimistic than they should have been.”

Jennifer Francis, senior scientist at the Woods Hole Research Center: 

“I’m not optimistic. It’s not just because of those feedbacks, it’s because we’ve already put so much carbon dioxide into the atmosphere and that carbon dioxide lasts a very long time. A molecule of carbon dioxide, on average, lasts about 100 years in the atmosphere. So, we haven’t yet felt the impacts of the carbon dioxide that we’ve already put in the atmosphere. Even not thinking about feedbacks, we’re already got a lot more climate change built into the system just because it takes awhile for the climate system to adjust itself to this new level of greenhouse gases in the atmosphere. All the feedback that [happens is] just making that response even bigger than it would be otherwise.”

Source: Yahoo News

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