Navigation Links
Extreme melting on Greenland ice sheet, reports CCNY team
Date:10/25/2011

ar's record values.

Temperatures and an albedo feedback mechanism accounted for the record losses, Professor Tedesco explained. "Albedo" describes the amount of solar energy absorbed by the surface (e.g. snow, slush, or patches of exposed ice). A white blanket of snow reflects much of the sun's energy and thus has a high albedo. Bare ice being darker and absorbing more light and energy has a lower albedo.

But absorbing more energy from the sun also means that darker patches warm up faster, just like the blacktop of a road in the summer. The more they warm, the faster they melt.

And a year that follows one with record high temperatures can have more dark ice just below the surface, ready to warm and melt as soon as temperatures begin to rise. This also explains why more ice sheet melting can occur even though temperatures did not break records.

Professor Tedesco likens the melting process to a speeding steam locomotive. Higher temperatures act like coal shoveled into the boiler, increasing the pace of melting. In this scenario, "lower albedo is a downhill slope," he says. The darker surfaces collect more heat. In this situation, even without more coal shoveled into the boiler, as a train heads downhill, it gains speed. In other words, melting accelerates.

Only new falling snow puts the brakes on the process, covering the darker ice in a reflective blanket, Professor Tedesco says. The model showed that this year's snowfall couldn't compensate for melting in previous years. "The process never slowed down as much as it had in the past," he explained. "The brakes engaged only every now and again."

The team's observations indicate that the process was not limited to the glacier they visited; it is a large-scale effect. "It's a sign that not only do albedo and other variables play a role in acceleration of melting, but that this acceleration is happening in many places all over Greenland," he cautioned. "We are
'/>"/>

Contact: Jessa Netting
jnetting@ccny.cuny.edu
212-650-7615
City College of New York
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Vegetation hardly affected by extreme flood events
2. Extreme nature helps scientists design nano materials
3. Extreme weather postpones the flowering time of plants
4. Geoscientists discuss sea level rise, extreme storm events and more
5. Genome projects launched for three extreme-environment animals
6. Treatment for extreme nausea, vomiting during pregnancy
7. Scientists track chemical changes in cells as they endure extreme conditions
8. Extreme genes shed light on origins of photosynthesis
9. First metallic nanoparticles resistant to extreme heat
10. Extremes of sleep related to increased fat around organs
11. Road salt and cars produce extreme water contamination in Frenchmans Bay, UTSC research reveals
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/6/2014)... is an asset for a predator. Except when that predator ... tiger beetle, relative to its size, is the fastest creature ... body lengths per second (at about five miles per hour). ... take the sprinting gold from the tiger beetle, a person ... The tiger beetle has a problem. At peak speeds, everything ...
(Date:11/4/2014)... University of Utah engineers developed the first room-temperature fuel ... electricity without needing to ignite the fuel. These new ... off-grid power and sensors. , A study of the ... Society journal ACS Catalysis . , Fuel cells ... a fuel and an oxygen-rich source such as air. ...
(Date:11/4/2014)... OXFORD, England , November 4, 2014 ... expansion and vertical market growth   Fuel3D ... it has closed a funding round totaling $6.4 million (£4 ... (£1.6 million) funding secured earlier this year and paves the ... product in 2015. The funding round was led ...
Breaking Biology News(10 mins):The tiger beetle: Too fast to see 2Jet-fueled electricity at room temperature 2Fuel3D Secures $6.4 Million in Expansion Funding 2Fuel3D Secures $6.4 Million in Expansion Funding 3
... provide statin drugs free of charge so that customers can ... Imperial College London suggest in a new study published this ... in the blood. A wealth of trial data has proven ... attack risk. In a paper published in the Sunday ...
... Mount Sinai School of Medicine, New York, has been ... receive a 2010 ICAAC Young Investigator Award. Sponsored ... an early career scientist for research excellence in microbiology ... postdoctoral training in Molecular Biology at Harvard University in ...
... 250 scientists, engineers, government advisers and groups concerned ... from August 15-20, 2010 to consider the impact ... University of Maryland is co-sponsoring the conference, The ... ), which is co-organized by University of Maryland ...
Cached Biology News:Free statins with fast food could neutralize heart risk, scientists say 2University of Maryland co-sponsors International Conference on the Effects of Noise on Aquatic Life 2University of Maryland co-sponsors International Conference on the Effects of Noise on Aquatic Life 3
(Date:11/27/2014)... DUBLIN , Nov. 27, 2014 ... of the "Global Palmitic Acid Industry Report 2014" ... http://photos.prnewswire.com/prnh/20130307/600769 The Global Palmitic Acid ... on the current state of the global palmitic acid ... of the industry including definitions, classifications, applications and industry ...
(Date:11/26/2014)... November 26, 2014 Publicis Healthcare Communications ... announced the organization has won a total of 20 ... Health LifeBrands was honored with a Silver Award and ... received eight Awards of Excellence. , The Annual ... advertising and promotion. The Awards provide a forum for ...
(Date:11/26/2014)... , Nov. 26, 2014 The announced ... indicate the company is looking to expand in non-healthcare ... sales.  The healthcare market research firm says that  Siemens ... Kalorama Information,s biennial survey of the IVD market , ... any change in its composition would likely affect IVD ...
(Date:11/26/2014)... November 26, 2014 PMG Research, Inc. ... PMG Research is a network of sites that provide clinical ... over 2 million patient lives through its partnerships with large ... of 11 hub site locations in the Southeastern United States ... term of the board will be held by: ...
Breaking Biology Technology:Global Palmitic Acid Industry Report 2014 2Publicis Healthcare Wins 20 Rx Club Awards 2Publicis Healthcare Wins 20 Rx Club Awards 3Kalorama: Sale of Three Siemens Healthcare Units Raises Questions About Firm's IVD Future 2PMG Research Names Medical Advisory Board 2PMG Research Names Medical Advisory Board 3
... care consulting firm with offices in Bethesda, MD and Pittsburgh, ... January 2012: , Karen Gerlach, PhD, MPH, to ... Vice President, Program Operations and Over-the-Counter Switch , Mitch ... to President , John Pinney, to Chief Executive Officer ...
... 2012 Aethlon Medical, Inc. (OTCBB: ... devices to address infectious disease, cancer and other ... an Extracorporeal Therapy Scientific Advisory Board to guide ... therapies developed from the Aethlon ADAPT™ system.  Aethlon ...
... Jan. 23, 2012 Novus International Inc., a leading ... and Verenium Corporation (Nasdaq: VRNM ), a ... commercialization of high-performance enzymes, today announced the selection of ... the two companies, strategic collaboration to advance ...
Cached Biology Technology:PinneyAssociates Announces Senior Staff Promotions 2Aethlon Medical Establishes Extracorporeal Therapy Scientific Advisory Board 2Aethlon Medical Establishes Extracorporeal Therapy Scientific Advisory Board 3Aethlon Medical Establishes Extracorporeal Therapy Scientific Advisory Board 4Aethlon Medical Establishes Extracorporeal Therapy Scientific Advisory Board 5Aethlon Medical Establishes Extracorporeal Therapy Scientific Advisory Board 6Aethlon Medical Establishes Extracorporeal Therapy Scientific Advisory Board 7First Product Candidate Moving Toward Commercialization as Result of Novus International and Verenium Collaboration 2First Product Candidate Moving Toward Commercialization as Result of Novus International and Verenium Collaboration 3First Product Candidate Moving Toward Commercialization as Result of Novus International and Verenium Collaboration 4First Product Candidate Moving Toward Commercialization as Result of Novus International and Verenium Collaboration 5
Several Pichia pastoris strains are available to allow you to optimize expression and recovery of your protein of interest. Table 1 provides information to help you choose the appropriate strain....
...
Request Info...
4-Hydroxy-3-nitrophenylacetyl hapten is conjugated to SSA (Sheep serum albumin) lysine through amide bonds. This product is homologous to NP-BSA....
Biology Products: