Navigation Links
Abrupt permafrost thaw increases climate threat
Date:11/30/2011

Fairbanks, Alaska -- As the Arctic warms, greenhouse gases will be released from thawing permafrost faster and at significantly higher levels than previous estimates, according to survey results from 41 international scientists published in the Nov. 30 issue of the journal Nature.

Permafrost thaw will release approximately the same amount of carbon as deforestation, say the authors, but the effect on climate will be 2.5 times bigger because emissions include methane, which has a greater effect on warming than carbon dioxide.

The survey, led by University of Florida researcher Edward Schuur and University of Alaska Fairbanks graduate student Benjamin Abbott, asked climate experts what percentage of the surface permafrost is likely to thaw, how much carbon will be released and how much of that carbon will be methane. The authors estimate that the amount of carbon released by 2100 will be 1.7 to 5.2 times larger than reported in recent modeling studies, which used a similar warming scenario.

"The larger estimate is due to the inclusion of processes missing from current models and new estimates of the amount of organic carbon stored deep in frozen soils," Abbott said. "There's more organic carbon in northern soils than there is in all living things combined; it's kind of mind boggling."

Northern soils hold around 1,700 billion gigatons of organic carbon, around four times more than all the carbon ever emitted by modern human activity and twice as much as is now in the atmosphere, according to the latest estimate. When permafrost thaws, organic material in the soil decomposes and releases gases such as methane and carbon dioxide.

"In most ecosystems organic matter is concentrated only in the top meter of soils, but when arctic soils freeze and thaw the carbon can work its way many meters down, said Abbott, who studies how carbon is released from collapsed landscapes called thermokarsts a process not accounted for in
'/>"/>

Contact: Marie Gilbert
megilbert@alaska.edu
907-474-7412
University of Alaska Fairbanks
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Slight changes in climate may trigger abrupt ecosystem responses
2. Permafrost line recedes 130 km in 50 years
3. Stream water study detects thawing permafrost
4. Thawing permafrost likely will accelerate global warming
5. Exercise increases brain growth factor and receptors, prevents stem cell drop in middle age
6. European ancestry increases breast cancer risk among Latinas
7. Long-term use of diabetes drugs by women significantly increases risk of fractures
8. Sweetened beverage consumption increases in the US
9. Gene mutation increases drug toxicity, rejection risk in pediatric kidney transplants
10. Indoor air pollution increases asthma symptoms
11. Lower increases in global temps could lead to greater impacts than previously thought, study finds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Abrupt permafrost thaw increases climate threat
(Date:9/30/2014)... engineers, led by Clemson University associate professor Brian ... from the U.S. Department of Energy,s Experimental Program ... positive impact on South Carolina in the advancement ... , "Understanding the scientific and engineering needs for ... nuclear technologies is imperative if South Carolina is ...
(Date:9/30/2014)... and farm runoff in Hawaii is causing tumors in ... The study, published Tuesday in the peer-reviewed open-access journal ... ends up in algae that the turtles eat, promoting ... and internal organs. , Scientists at Duke University, the ... Administration (NOAA) conducted the study to better understand the ...
(Date:9/30/2014)... available in German . ... response to risky situations such as exposure to predators. ... found in a long-term study on different populations of ... rate and ambient temperature. High metabolic rates and low ... these scenarios birds were more likely to approach potential ...
Breaking Biology News(10 mins):Researchers get $5.25 million to advance nuclear technologies in South Carolina 2Pollution linked to lethal sea turtle tumors 2Pollution linked to lethal sea turtle tumors 3Risky metabolism 2
... Despite dozens of interceptions at U.S. ports, a public enemy ... N.Y., and identified by a Cornell University expert, the adult ... discovered in the eastern United States. , The discovery of ... woodwasp, raises red flags across the nation because the invasive ...
... study in the April issue (currently available online) ... take scientists closer to understanding how cells in ... Researchers, led by Anthony Firulli, Ph.D., associate professor ... at the Indiana University School of Medicine, investigated ...
... to happen - you being in a car wreck or being ... greater killers win a free trip to the beach. It's really ... being in a wreck are far greater than being a shark's ... who has studied sharks for years. , Worldwide, about one million ...
Cached Biology News:Alien woodwasp, threat to US pine trees, found in N.Y. 2Determining The Fate Of Cells In The Human Body 2New HIV drug candidate developed in Sweden 2
(Date:10/1/2014)... TeselaGen Biotechnology has received ... expand their bioCAD/CAM software suite, which uses synthetic ... Small Business Innovation Research Phase II grant will be ... license from the Lawrence Berkeley National Laboratory. j5 was ... LBNL laboratory that develops alternative fuel technologies for the ...
(Date:10/1/2014)... 30, 2014 This report analyzes ... US$ Million by the following Product Segments: ... Specific end-use segments also analyzed are Pharmaceuticals ... The report provides separate comprehensive analytics for ... East, and Latin America. Annual estimates and ...
(Date:9/30/2014)... release is available in German . ... around several quantum dots in a semiconductor layer. Quantum dots ... of atomic processes. If a short laser pulse is fired ... the quantum dot experiences a change in the electromagnetic field ... the emission of light by the dot. As soon as ...
(Date:9/30/2014)... German . , ... demonstrated a new kind of building block for digital ... could be based on three-dimensional arrangements of nanometer-scale magnets ... the semiconductor industry CMOS fabrication of silicon chips ... at the University of Notre Dame are exploring "magnetic ...
Breaking Biology Technology:TeselaGen Receives $750k NSF SBIR Phase II Award 2TeselaGen Receives $750k NSF SBIR Phase II Award 3Global Specialty Enzymes Industry 2Global Specialty Enzymes Industry 3Global Specialty Enzymes Industry 4Global Specialty Enzymes Industry 5Global Specialty Enzymes Industry 6Global Specialty Enzymes Industry 7Global Specialty Enzymes Industry 8Global Specialty Enzymes Industry 9Global Specialty Enzymes Industry 10Global Specialty Enzymes Industry 11Global Specialty Enzymes Industry 12Global Specialty Enzymes Industry 13Global Specialty Enzymes Industry 14Global Specialty Enzymes Industry 15Global Specialty Enzymes Industry 16Global Specialty Enzymes Industry 17Global Specialty Enzymes Industry 18Global Specialty Enzymes Industry 19Global Specialty Enzymes Industry 20Global Specialty Enzymes Industry 21Global Specialty Enzymes Industry 22Global Specialty Enzymes Industry 23Global Specialty Enzymes Industry 24Global Specialty Enzymes Industry 25Global Specialty Enzymes Industry 26Ultrafast remote switching of light emission 2A new dimension for integrated circuits: 3-D nanomagnetic logic 2A new dimension for integrated circuits: 3-D nanomagnetic logic 3
... SEATTLE, March 8, 2011 Cell Therapeutics, Inc. (CTI) ... present at the Bio Europe Spring 2011 Conference on ... 1, room Yellow 2, at Milano Convention Centre, Milan, ... PM CET /10:30 AM EST/ 7.30 AM PSTRoom Yellow ...
... NEW YORK, March 7, 2011 Reportlinker.com ... is available in its catalogue: ... strategic assessment of the competitive environment is ... priority management responsibilities, the task crucial to ...
... Reportlinker.com announces that a new market ... The 2011 Blood Banking ... and Business Expansion Strategies for Suppliers ... During the next ten years, the blood ...
Cached Biology Technology:Reportlinker Adds The 2011 Top Ten World's Leading Life Science Intermediates Companies 2Reportlinker Adds The 2011 Blood Banking Market: US, Europe, Japan - Emerging Opportunities and Business Expansion Strategies for Suppliers 2