Estimating the permafrost-carbon feedback on global warming
Thawing of permafrost and the associated release of carbon constitutes a positive feedback in the climate system.
Thawing of permafrost and the associated release of carbon constitutes a positive feedback in the climate system.
The instability is also found to be strongly dependent on the rate of global warming.
You would have to go back at least 15 million years to find carbon dioxide levels on Earth as high as they are today.
West Nile Virus is now known to infect a wide range of birds, with secondary transmission to many mammals as well as humans.
Climate change is the main driver behind the unexpected emergence of a group of bacteria in northern Europe.
What we're doing now is over a hundred times faster.
Our findings imply that in a warming climate, disintegration of permafrost, glaciers and parts of the polar ice sheets could facilitate the transient expulsion of 14C-depleted methane trapped by the cryosphere cap.
Peter Sinclair interviews Richard Alley at a conference in Colorado.