Reply To: Global warming is well underway

#4290
imported_Martin
Participant

Following the “compost effect” notions, news that carbon is being released more quickly from some northern lakes:

Quote:
By Seth Borenstein, The Associated Press
WASHINGTON — New research is raising concerns that global warming may be triggering a self-perpetuating climate time bomb trapped in once-frozen permafrost.
As the Earth warms, greenhouse gases once stuck in the long-frozen soil are bubbling into the atmosphere in much larger amounts than previously anticipated, according to a study in Thursday’s journal Nature.

Methane trapped in a special type of permafrost is bubbling up at a rate five times faster than originally measured, the journal said.

Scientists are fretting about a global warming vicious cycle that had not been part of their already gloomy climate forecasts: Warming already underway thaws permafrost, soil that had been continuously frozen for thousands of years.

The effect reported in Nature is seen mostly in Siberia, but also elsewhere, in a type of carbon-rich permafrost, flash frozen about 40,000 years ago.

“It’s kind of like a slow-motion time bomb,” said Ted Schuur, a professor of ecosystem ecology at the University of Florida and co-author of the Science study. “There’s these big surprises out there that we don’t even know about.”

Scientists find new global warming threat from melting permafrost