Featured Research

from universities, journals, and other organizations

Global Warming Could Release Trillions Of Pounds Of Carbon Annually From East Siberia's Vast Frozen Soils

Date:
June 12, 2008
Source:
American Geophysical Union
Summary:
East Siberia's permafrost contains about 500 Gigatons (1100 trillion pounds) of frozen carbon deposits that are highly susceptible to disturbances as the climate warms. Once started, irreversible thawing could release 4.4-6.2 trillion pounds of carbon per year into the atmosphere between the years 2300 and 2400, transforming 74 percent of the initial carbon stock into carbon dioxide and methane.

East Siberia's permafrost contains about 500 Gigatons (1100 trillion pounds) of frozen carbon deposits that are highly susceptible to disturbances as the climate warms.

Related Articles


Called the Yedoma, this permafrost has not undergone much alteration by soil microorganisms since its formation, which took place between 20,000 and 40,000 years ago. To investigate how easily this huge carbon stock could be degassed in future warming scenarios, Khvorostyanov et al. use a model of heat transfer and soil organic matter decomposition in frozen soils and find that specific conditions trigger the irreversible thawing of Yedoma, which is maintained by heat production by soil microbial activity.

Once started, irreversible thawing could release 4.4-6.2 trillion pounds of carbon per year into the atmosphere between the years 2300 and 2400, transforming 74 percent of the initial carbon stock into carbon dioxide and methane.

Further investigations reveal that the faster the planet's surface warms, the sooner fast deep-soil decomposition will start, although the tipping point above which soil carbon starts irreversible mobilization due to permafrost thawing increases slightly with larger external warming rates.


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Journal Reference:

  1. Khvorostyanov et al. Vulnerability of east Siberia's frozen carbon stores to future warming. Geophysical Research Letters, 2008; 35 (10): L10703 DOI: 10.1029/2008GL033639

Cite This Page:

American Geophysical Union. "Global Warming Could Release Trillions Of Pounds Of Carbon Annually From East Siberia's Vast Frozen Soils." ScienceDaily. ScienceDaily, 12 June 2008. <www.sciencedaily.com/releases/2008/06/080611154839.htm>.
American Geophysical Union. (2008, June 12). Global Warming Could Release Trillions Of Pounds Of Carbon Annually From East Siberia's Vast Frozen Soils. ScienceDaily. Retrieved February 1, 2015 from www.sciencedaily.com/releases/2008/06/080611154839.htm
American Geophysical Union. "Global Warming Could Release Trillions Of Pounds Of Carbon Annually From East Siberia's Vast Frozen Soils." ScienceDaily. www.sciencedaily.com/releases/2008/06/080611154839.htm (accessed February 1, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Sunday, February 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Hikers Rescued After Fall from Oregon Mountain

Hikers Rescued After Fall from Oregon Mountain

AP (Feb. 1, 2015) Two climbers who were hurt in a fall on Mount Hood are now being treated for their injuries. Rescue officials say they were airlifted off the mountain Saturday afternoon by an Oregon National Guard helicopter. (Feb. 2) Video provided by AP
Powered by NewsLook.com
NASA's SMAP Satellite Will Measure Wet Dirt From Space

NASA's SMAP Satellite Will Measure Wet Dirt From Space

Newsy (Feb. 1, 2015) NASA&apos;s Soil Moisture Active Passive satellite mission will collect data to help forecast crop productivity, floods, droughts and wildfires. Video provided by Newsy
Powered by NewsLook.com
Raw: Rare Clouds Fill Grand Canyon

Raw: Rare Clouds Fill Grand Canyon

AP (Jan. 29, 2015) For the second time in two months, a rare weather phenomenon filled the Grand Canyon with thick clouds just below the rim on Wednesday. (Jan. 29) Video provided by AP
Powered by NewsLook.com
Senate Passes Bill for Keystone XL Pipeline

Senate Passes Bill for Keystone XL Pipeline

AP (Jan. 29, 2015) The Republican-controlled Senate has passed a bipartisan bill approving construction of the Keystone XL oil pipeline. (Jan. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins