Navigation Links
Arctic climate may be more sensitive to warming than thought, says new study
Date:6/29/2010

of past surface temperatures. The team also compared data on the width of tree rings in larch trees at the Beaver Pond site to trees at lower latitudes today to help them estimate past temperatures and precipitation levels.

The researchers also analyzed the distribution of ancient membrane lipids from soil bacteria known as tetraethers, which correlate to temperature. The chemical structure of the fossilized tetraethers makes them highly sensitive to both temperature and acidity, or pH, said Ballantyne.

The last line of evidence put forward by the CU-Boulder-led team was a comparison of Pliocene ancient vegetation at the site with vegetation present today, providing a clear "climate window" showing the overlap of the two time periods. "The results of the three independent temperature proxies are remarkably consistent," said Eberle. "We essentially were able to 'read' the vegetation in order to estimate air temperatures in the Pliocene."

Today, Ellesmere Island is a polar desert that features tundra, permafrost, ice sheets, sparse vegetation and a few small mammals. Temperatures range from roughly minus 37 degrees F, or minus 38 degrees C, in winter to 48 degrees F, or 9 degrees C, in summer. The region is one of the coldest, driest environments on Earth.

"Our findings are somewhat disconcerting regarding the temperatures and greenhouse gas levels during the Pliocene," said Eberle. "We already are seeing evidence of both mammals and birds moving northward as the climate warms, and I can't help but wonder if the Arctic is headed toward conditions similar to those that existed during the Pliocene."

Elevated Arctic temperatures during the Pliocene -- which occurred shortly before Earth plunged into an ice age about 2.5 million years ago -- are thought to have been driven by the transfer of heat to the polar regions and perhaps by decreased reflectivity of sunlight hitting the Arctic due to a lack of ice, said Balla
'/>"/>

Contact: Ashley Ballantyne
ashley.ballantyne@colorado.edu
University of Colorado at Boulder
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Texas researchers and educators head for Antarctica
2. LSU professor looks for life in and under antarctic ice
3. Satellites witness lowest Arctic ice coverage in history
4. Woods Hole Research Center to lead undergraduate initiative in the Siberian Arctic
5. Less Arctic ice means higher risks, experts warn
6. ANDRILLs 2nd Antarctic drilling season exceeds all expectations
7. Massive dinosaur discovered in Antarctica sheds light on life, distribution of sauropodomorphs
8. High degree of resistance to antibiotics in Arctic birds
9. Antarctic ice loss
10. Exploration of lake hidden beneath Antarcticas ice sheet begins
11. Antarctic expedition provides new insights into the role of the Southern Ocean for global climate
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Arctic climate may be more sensitive to warming than thought, says new study
(Date:12/17/2014)... Dec. 16, 2014 Research and Markets ... of the "Global Chemical Sensor Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 One major ... demand for medical sensors in biomedical applications. Chemical ... quick and correct diagnosis during surgical procedures. The ...
(Date:12/11/2014)... Research and Markets , ... http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition of the ...  report to their offering. One ... in technology. With continuous advances in technology, it ... latest standard that meets the needs and expectations ...
(Date:12/11/2014)... PAUL, Minn. , Dec. 10, 2014 /PRNewswire/ ... wireless physiologic monitoring, has released a new series ... needs of preclinical toxicology researchers. M series, part ... help toxicologists collect the best possible physiologic data ... Adding functional endpoints to toxicology studies ...
Breaking Biology News(10 mins):Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2New telemetry implants expected to change how large animal toxicology studies are conducted 2
... Therapeutics, Inc., reversed the growth of lung tumors in mice ... reveals that a tiny bit of RNA may one day ... for future patients battling one of the most prevalent and ... has shown a positive effect of microRNAs in shrinking lung ...
... into venom produced by snakes and spiders, venomous fish ... Now, a study of 158 catfish species, published in ... has catalogued the presence of venom glands and investigated ... the University of Michigan, USA, carried out the investigation. ...
... Kew and the Natural History Museum believe that carnivorous behaviour ... many commonly grown plants such as petunias at ... Murderous plants: Victorian Gothic, Darwin and modern insights into vegetable ... Botanical Journal of the Linnean Society . Carnivorous plants ...
Cached Biology News:Scientists think 'killer petunias' should join the ranks of carnivorous plants 2
(Date:12/24/2014)... Missouri (PRWEB) December 23, 2014 GMO ... Swiss biotechnology company, Syngenta, are in the process of ... proceedings. The consolidated case is In Re: Syngenta AG ... U.S. District Court for the District of Kansas. , ... has been handed over to U.S. District Judge John ...
(Date:12/24/2014)... 23, 2014 The report ... as its definition, classification, application and industry ... manufacturing process, and product cost structure. Production ... The analysis also covers upstream raw materials, ... development trend and proposals. In the end, ...
(Date:12/24/2014)... Dec. 23, 2014 Vermillion, Inc. (Nasdaq: ... gynecologic disease, announced today that investors including Oracle ... Fund LLC and several Vermillion directors have agreed ... of Vermillion,s common stock and warrants to purchase ... private placement.  Under the terms ...
(Date:12/22/2014)... & Brussels (PRWEB) December 22, 2014 ... (CfPIE), the global leader of technical training across the ... for Clinical Data Management (SCDM) to provide the ... certification programs —providing access to the more than ... extends SCDM members with 10% off when registering for ...
Breaking Biology Technology:Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2Worldwide Methyl Mercaptan Market 2015-2020 Forecasts on Development & Trends Now Available at ReportsnReports.com 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 3Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 4Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 5CfPIE Announces Partnership with the Society for Clinical Data Management 2CfPIE Announces Partnership with the Society for Clinical Data Management 3
... Nov. 14 Techne Corporation,(Nasdaq: TECH ) today ... of up to $150 million of the Company,s outstanding ... an expiration date.,The manner of purchases, the amount that ... purchases will be at the discretion of management,and will ...
... Shipments to Fill Backlog of Orders, JACKSONVILLE, Fla., ... PHLC) (the "Company") announced today that,its has recently produced ... sale of the product in 450 7-Eleven stores located,from ... recently completed a production of its new, larger (20-oz.),version ...
... Hollingsworth & Vose,Company (H&V), a leading global ... its HVision(TM) technology platform, a collaborative,process designed ... products. "HVision will provide H&V with ... new generation of products that exceed present ...
Cached Biology Technology:Techne Corporation Announces Share Repurchase Authorization 2Phlo Affiliate Ships Product to Launch 450 7-Eleven Stores 2H&V Introduces HVision Technology Platform to Accelerate Development of Breakthrough Products 2
Request Info...
SCP-1 (P-17)...
Rabbit polyclonal to Kallikrein 1 ( Abpromise for all tested applications). Antigen: Full length native kallikrein from tissue (Human) Entrez Gene ID: 3816 Swiss Protein ID: P06870...
PSGL-1 (215)...
Biology Products: