When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...
On Friday, 01 April 2016 from 9:00 a.m. to 3:00 p.m. (USA Mountain Time), FTP and some applications on our web site may be unavailable due to system maintenance. We apologize for any inconvenience this may cause you.
A type of Pleistocene-age (formed 1.8 million to 10,000 years before present) permafrost that contains a significant amount of organic material with ice content of 5090% by volume. Thawing yedoma is a significant source of atmospheric methane.
A yedoma in Russia shows the thick layer of ice and carbon material exposed along this body of water. --Credit: Vladimir Romanovsky