Navigation Links
Stream water study detects thawing permafrost
Date:5/5/2010

ANN ARBOR, Mich.---Among the worrisome environmental effects of global warming is the thawing of Arctic permafrost---soil that normally remains at or below the freezing point for at least a two-year period and often much longer. Monitoring changes in permafrost is difficult with current methods, but a study by University of Michigan researchers offers a new approach to assessing the extent of the problem.

The new study approach, which relies on chemical tracers in stream water, is described in the journal Chemical Geology.

Overlying permafrost is a thin "active layer" that thaws every summer, and increases in the thickness of this layer over the years indicate thawing of permafrost. Both physical measurements and modeling suggest that active layer thickness has increased in some areas over the 20th century and that if present warming trends continue, increases of up to 40 percent could occur by the end of the 21st century.

Although the full effects of thawing are yet to be determined, coastal erosion and damage to the roads, buildings and pipelines that have been built on permafrost are likely outcomes. In addition, thawing permafrost may release the greenhouse gases carbon dioxide and methane into the atmosphere, triggering further warming and more permafrost thawing.

Currently, the main method for determining thaw depth is with a graduated steel probe. "You stick it in the ground and see when it hits frozen material," said geochemist Joel Blum, who with ecologist George Kling and former graduate student Katy Keller undertook the new study.

"We were studying the chemistry of soils in the area around Toolik Field Station in northern Alaska, and we found that once we got below the thickness that typically would thaw during summer, the soil chemistry changed dramatically," said Blum, who is the John D. MacArthur Professor of Geological Sciences. "Material that has not thawed since it was deposited by glaciers 10
'/>"/>

Contact: Nancy Ross-Flanigan
rossflan@umich.edu
734-647-1853
University of Michigan
Source:Eurekalert

Page: 1 2

Related biology news :

1. Volcanic ash research shows how plumes end up in the jet stream
2. New study shows rising water temperatures in US streams and rivers
3. Cold fusion moves closer to mainstream acceptance
4. Study shows woody plant encroachment has increased stream flow in the Edwards Plateau
5. New studies reveal downstream processes of ion channel inactivation
6. How good are tests for E. coli in streams?
7. Chloride found at levels that can harm aquatic life in urban streams of the Northern US
8. Spring cold snap helps with stream ecosystem research
9. Interventional radiology: From sidelines to mainstream for patients
10. Penn medicine draws road map for elimination of central line-associated bloodstream infections
11. GEN reports biomanufacturers target a fully disposable process stream
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/22/2014)...  The 2014 Holiday Season may be the brightest ever ... that the long anticipated floodgates for consumer biometrics may ... smart phones, tablets, and wearable mobile devices that incorporate ... users with nearly 4.8 billion biometric devices by 2020.   ...
(Date:12/19/2014)... 2014 Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) has ... America Perimeter Security Systems Market" report to their offering. ... North American perimeter security market is estimated to grow at ... U.S. market holds a larger share in this market, ...
(Date:12/19/2014)... LaunchKey , the first decentralized mobile authentication and authorization ... era, today announced the close of $3 million in ... Metamorphic Ventures with participation from ENIAC Ventures, Crosslink Capital, ... has raised $4 million to date, and will use ...
Breaking Biology News(10 mins):First Season of Holiday Shopping with Mobile Biometric Payments Wraps Up With a Present for Biometrics Industry: A Rosy Forecast for More Than 2 Billion Users of 4.8 Billion Mobile Biometric Devices by 2020 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3
... major players in the cruise industry, including cruise ... with civil society organizations - are taking proactive ... tourism while preserving cruise destinations, according to a ... Stewardship in Cruise Destinations issued by Conservation International's ...
... There is growing concern about the threats that ... populations. , Consumers and environmentalists are concerned about ... in farmed strains at the genetic level are ... the journal Molecular Ecology, researchers have found scientific ...
... infectious disease researchers at The Miriam Hospital and Brown Medical ... HIV is also safe when applied as a vaginal microbicide ... HIV and other sexually transmitted diseases and may be formulated ... results of this study may change the way the research ...
Cached Biology News:Report finds cruise industry is protecting the precious places it visits 2Report finds cruise industry is protecting the precious places it visits 3Report finds cruise industry is protecting the precious places it visits 4Anti-HIV drug has potential to prevent transmission in women 2Anti-HIV drug has potential to prevent transmission in women 3
(Date:1/22/2015)... The laboratory information management systems market is ... of technological advancements due to factors such as rising ... integrate healthcare systems, and increasing government support for adoption ... Key players in the market focus on technological advancements ...
(Date:1/22/2015)... California (PRWEB) January 22, 2015 Pipette.com ... Offer to their comprehensive portfolio of Eppendorf products. ... customers to purchase a Centrifuge 5424/5424 R and receive ... of either Eppendorf Research plus or Eppendorf Reference 2 ...
(Date:1/22/2015)... January 22, 2015 Controlled Substance Compliance ... which helps companies check the legal requirements around using ... to China. , As their international operations expand ... adopting software solutions built as a result of the ...
(Date:1/22/2015)... Nueva Jersey , 22 de enero de 2015  El ... abre hoy su llamada a nominaciones para 2015. Este ... ha hecho, o tiene el potencial para hacer, contribuciones ... nominaciones se aceptarán hasta el 15 de marzo de ...
Breaking Biology Technology:Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 4Eppendorf Announces Promotional Bundle Which Includes: Eppendorf Centrifuge 5424, 3-Pack of Pipettes, and Tips - Available Now at Pipette.com 2Global Compliance Service for Controlled Substances to Expand to China 2El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 2El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 3El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 4
... BASKING RIDGE, N.J., Sept. 3 Regado Biosciences, ... with active control agents, announced today that David J. Mazzo, ... the 11th Annual Healthcare Conference of the Rodman & Renshaw ... on Thursday, September 10, 2009 (EDT). Dr. Mazzo,s ...
... /PRNewswire-Asia/ -- Sinovac Biotech Ltd. (NYSE: SVA ... today that,the State Food and Drug Administration (SFDA) has ... has issued Sinovac a,production license for this vaccine. , ... that PANFLU.1, Sinovac,s H1N1,vaccine, has a good safety and ...
... CARY, N.C., Sept. 3 Cornerstone Therapeutics Inc. ... focused on acquiring, developing and commercializing significant products primarily ... it has received the approval of the United States ... acquisition of the commercial rights to the antibiotic Factive(R) ...
Cached Biology Technology:Regado Biosciences to Present at the Rodman & Renshaw Global Investment Conference on September 10, 2009 2Sinovac Obtains Production License for H1N1 Vaccine 2Sinovac Obtains Production License for H1N1 Vaccine 3Cornerstone Therapeutics Receives Approval to Acquire Commercial Rights to the Antibiotic Factive(R) 2Cornerstone Therapeutics Receives Approval to Acquire Commercial Rights to the Antibiotic Factive(R) 3Cornerstone Therapeutics Receives Approval to Acquire Commercial Rights to the Antibiotic Factive(R) 4Cornerstone Therapeutics Receives Approval to Acquire Commercial Rights to the Antibiotic Factive(R) 5
Tight junctions are complexes of proteins that create intercellular boundaries between the plasma membrane domains of epithelial and endothelial cells. Antigen: Synthetic peptide corresponding to...
Polyclonal Antibody to TRIB1/ SKIP1/ Tribbles 1...
TNF-Related Apoptosis Inducing Ligand-Receptor-1...
PMA (YPMA-1)...
Biology Products: