Navigation Links
Polar bears: On thin ice? Extinction can be averted, scientists say

atmospheric scientist. "We looked for Arctic sea ice tipping points in a climate model in which sea ice is known to be very sensitive to global warming, and we didn't find any."

The challenging issue, he said, is that even without tipping points, sea ice can undergo periods of rapid decline. "But these rapid declines occur due to a combination of natural volatility on a declining trend," says DeWeaver, "rather than a tipping point."

"Ultimately the outcome depends on how much greenhouse gas we add to the atmosphere in the future," he said, "not how much we've added until now."

"Our research offers a very promising, hopeful message, but it's also an incentive for mitigating greenhouse emissions," said Bitz.

Because the scientists specifically looked at whether there's a tipping point beyond which seasonal Arctic ice could not recover, they used a general circulation model in which the sea ice is particularly sensitive to rising temperatures.

Previous work by Bitz and others showed that unchecked temperature increases, along with natural environmental volatility, could result in the loss of vast areas of Arctic ice in less than a decade.

It also showed that with continued business-as-usual greenhouse gas emissions, the ice did not recover and largely disappeared altogether in following decades.

However, the new Nature paper indicates that if greenhouse gas emissions were reduced substantially in the near future, rapid ice losses would be followed by substantial retention of the remaining ice through this century--and partial recovery of the ice that disappeared during the rapid ice loss.

Polar bears depend on sea ice for access to ringed and bearded seals, their primary food source. During seasons when they can't reach ice, the bears mostly go without food and can lose about two pounds a day.

The periods when they don't have ice access have increased, and are expected to continue to do so with the current level of green

Contact: Cheryl Dybas
National Science Foundation

Page: 1 2 3

Related biology news :

1. New study about Arctic sea-ice, greenhouse gases and polar bear habitat
2. Its time for Europe to step up research in the polar regions
3. Biologists report more bad news for polar bears
4. Council of Science and Humanities recommends building of Polarstern II
5. Polar bears cant eat geese into extinction
6. Highlight of the Polarstern expedition
7. Scientists call for a new strategy for polar ocean observation
8. New link identified for bipolar disorder
9. Beyond polar bears? Experts look for a new vision of climate change to combat skepticism
10. Grizzly bears move into polar bear habitat in Manitoba, Canada
11. Understanding global climate change through new breakthroughs in polar research
Post Your Comments:
(Date:3/26/2015)... , March 26, 2015 ... family, social, recreation and athletic club, today announced it ... to allow freedom of movement for members and staff, ... "Following a comprehensive process, we selected FST,s IMID Access ... and convenience for our members and staff, in addition ...
(Date:3/24/2015)... WASHINGTON , March 24, 2015   NexID ... applications with critical security-authentication needs, today announced the beginning ... fake-finger-detection (FFD) solution. The company, based in ... announcement at the three-day Connect:ID Expo, which began here ... NexID said version 2.0 of its SDK boosts ...
(Date:3/23/2015)... , March 23, 2015   HOYOS Labs , ... company, today announced that the Company will demonstrate multiple ... enterprise and consumers at Connect:ID on March 23 through ... HOYOS Labs will highlight the IEEE Biometric Open Protocol ... ; and enterprise access control system. BOPS was invented ...
Breaking Biology News(10 mins):Granite Club First Private Club in North America to Implement FST Biometrics Secure Access Solution, as Part of Multi-million Dollar Expansion 2NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 3
... North American stilt-legged horses have found a new place ... in the open access journal PLoS Biology. In the ... DNA to argue that the Hippidion genus is younger ... American endemics, not Asian emigres. Their analysis has also ...
... technique aimed at directly controlling the expression of genes by ... lead to drugs for the treatment or cure of many ... every disease starts at the level of malfunctioning gene expression, ... professor of pharmacology and biochemistry. "This is an approach that ...
... grass, not for fun but for fuel. Burning grass ... for decades. But not in the United States. , ... energy-efficient, environmentally friendly and sustainable, says a Cornell University ... be produced and pelleted by farmers and burned in ...
Cached Biology News:Ancient DNA helps clarify the origins of two extinct New World horse species 2Gene silencing technique offers new strategy for treating, curing disease 2Grass makes environmentally friendly biofuel 2
(Date:4/27/2015)... BARCELONA, Spain , April 27, 2015  Together ... during the 3rd ESTRO Forum in Barcelona ... Hope, a nonprofit organization with the mission to improve ... Radiating Hope believes that no patient should ... is not affordable. Consequently, it cooperates with hospitals and ...
(Date:4/24/2015)... 24, 2015 Leading Regenerative Veterinary ... its allogeneic stem-cell product development program and changes ... the corporate strategic direction. , “I am extremely ... stem cell development program has been kicked into ... manufacturing facility and hiring of our new Director ...
(Date:4/24/2015)... , April 24, 2015  Navitas Life Sciences is delighted ... Head of Clinical and Regulatory Services. Shalabh is a proven ... co-founder and CEO of Kinapse, as well as a Strategy ... Logo - ... commented "I am delighted to welcome Shalabh into this ...
(Date:4/23/2015)... Dora, Florida (PRWEB) April 23, 2015 ... that it intends to conduct a groundbreaking pilot ... begin to be reversed in as little as ... the science of metabolic and nutritional medicine—will aggressively ... that cripple and destroy our aging brain. These ...
Breaking Biology Technology:Elekta helps raise $33,000 to bring radiation treatment to developing countries 2Elekta helps raise $33,000 to bring radiation treatment to developing countries 3Vet-Stem, Inc. Meets New Milestones and Changes Name to VetStem Biopharma 2Shalabh Kumar Joins Navitas Life Sciences to Lead their Clinical and Regulatory Services Teams 2New Study Looks to Reverse Alzheimer’s Disease 2New Study Looks to Reverse Alzheimer’s Disease 3
... ... learn about the oldest buildings on earth and a “fascinatingly weird” ancient culture. ... (PRWEB) June 11, 2010 -- ... website to provide a simple introduction to megalithic architects in Frequently Asked Question format. ...
... ... in clinical research, key issues around open source technology are highlighted at leading industry events. ... Washington, DC (PRWEB) June ... meeting of the Drug Information Association (DIA). The DIA Annual Meeting is the ...
... , DENVER , June 11 On Wednesday June ... Meeting to discuss patient-focused clinical research systems in the age of personalized cancer ... at North Shore Hematology/Oncology Associates in East Setauket, NY and ... , , , ...
Cached Biology Technology:New tool for exploring the ancient world. 2Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 2Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 3Pharmatech Oncology to Present at 46th Annual DIA Meeting 2Pharmatech Oncology to Present at 46th Annual DIA Meeting 3
... precision, more user-friendliness and absolute reliability united ... definition of the Mastercycler ep system. In ... has been developing dynamically. The same applies ... To keep pace with these technological ...
... This kit is designed for easy ... The protocol allows for successful transformation simply ... kit reagents with cultured yeast cells. No ... washing, are required. The kit is particularly ...
... LabX light balance makes your life easier. It offers ... and management for one balance. *Instruments supported: ... AX, MX, UMX, AG, XS, XP, PR, SR, PG-S, ... *Job management: User ...
... Form: powder ,Components g/500 ... 2.5 ,Sodium chloride 2.5 ,Agar ... citrate 0.250 ,IPTG 0.025 ,Kanamycin ... is a complete growth medium ...
Biology Products: