Navigation Links
Ancient glacial melting process similar to existing concerns about Antarctica, Greenland
Date:8/1/2011

CORVALLIS, Ore. An analysis of prehistoric "Heinrich events" that happened many thousands of years ago, creating mass discharges of icebergs into the North Atlantic Ocean, make it clear that very small amounts of subsurface warming of water can trigger a rapid collapse of ice shelves.

The findings, to be published this week in Proceedings of the National Academy of Sciences, provide historical evidence that warming of water by 3-4 degrees was enough to trigger these huge, episodic discharges of ice from the Laurentide Ice Sheet in what is now Canada.

The results are important, researchers say, due to concerns that warmer water could cause a comparatively fast collapse of ice shelves in Antarctica or Greenland, increasing the flow of ice into the ocean and raising sea levels. One of the most vulnerable areas, the West Antarctic Ice Sheet, would raise global sea level by about 11 feet if it were all to melt.

"We don't know whether or not water will warm enough to cause this type of phenomenon," said Shaun Marcott, a postdoctoral researcher at Oregon State University and lead author of the report. "But it would be a serious concern if it did, and this demonstrates that melting of this type has occurred before."

If water were to warm by about 2 degrees under the ice shelves that are found along the edges of much of the West Antarctic Ice Sheet, Marcott said, it might greatly increase the rate of melting to more than 30 feet a year. This could cause many of the ice shelves to melt in less than a century, he said, and is probably the most likely mechanism that could create such rapid changes of the ice sheet.

To find previous examples of such events, scientists reconstructed past ocean temperatures and used computer simulations to re-create what probably happened at various times during Heinrich events of the distant past. It had been known for some time that such events were associated with major climate changes,
'/>"/>

Contact: Shaun Marcott
marcotts@science.oregonstate.edu
541-737-1248
Oregon State University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Endangered river turtles genes reveal ancient influence of Maya Indians
2. Genetic switch for limbs and digits found in ancient fish
3. Ancient symbiosis between animals and bacteria discovered
4. Ancient species of mayfly had short, tragic life
5. Adjustable valves gave ancient plants the edge
6. Significant role of oceans in onset of ancient global cooling
7. Scientists discover fossil of giant ancient sea predator
8. Battle scars found on an ancient sea monster
9. Cold case: Siberian hot springs reveal ancient ecology
10. Fossil sirenians give scientists new look at ancient climate
11. Reptilian root canal: U of T Mississauga study reveals infection in jaw of ancient fossil
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2014)... pledge of $1 million from the Cornelia Cogswell Rossi ... Biometry Center. , The newly established Connie ... to develop a greater breadth and depth of knowledge ... the pace of research to improve human health. , ... for the Laboratory and its external partners, supporting research ...
(Date:7/30/2014)... POTSDAM, N.Y. , July 30, 2014 /PRNewswire/ ... of spoof mitigation and liveness detection solutions for ... FIDO Alliance, an industry consortium revolutionizing online authentication ... COO Mark Cornett , "The decision to ... help make biometric authentication pervasive in use. We ...
(Date:7/30/2014)... Americans make better decisions about what they eat, the ... significant changes to the Nutrition Facts label found on ... in Chemical & Engineering News (C&EN), the ... the suggested updates and the fight that has ... points out that while the Nutrition Facts label has ...
Breaking Biology News(10 mins):Rossi Foundation pledges $1M for JAX neurobehavioral research center 2NexID Biometrics Joins the FIDO Alliance 2
... Thailands Western Forest Complex a 6,900 square ... reserves can potentially support some 2,000 tigers, making ... big cats, according to a new study by Thailands ... the New York-based Wildlife Conservation Society. The study, ...
... -- world leader and,patent-holder in camera-enabled gesture interfaces ... AirPoint System, and announced the,first installation for Fortune ... unit that allows users to control interactive,multi-media content ... simple hand,motions above the unit. No interface device ...
... 2007 - The National Fish and Wildlife Foundation ... Manomet Center for Conservation Sciences to sustain the ... the decline of shorebird populations throughout the Western ... by the Western Hemisphere Shorebird Reserve Network (WHSRN), ...
Cached Biology News:Study says 2000 tigers possible in Thailand 2GestureTek/Imagination Launch AirPoint, World's First Hand-Tracking Unit, for Shell Group. 2GestureTek/Imagination Launch AirPoint, World's First Hand-Tracking Unit, for Shell Group. 3Manomet Center awarded major NFWF grant to foster shorebird conservation 2Manomet Center awarded major NFWF grant to foster shorebird conservation 3
(Date:7/31/2014)... -- Smith & Nephew (LSE:SN, NYSE: SNN ... its entry into the forefoot market with the ... Comprised of three separate repair options, the HAT-TRICK ... and reconstruction, a metatarsal osteotomy guide, and a ... also known as hammer toe correction. ...
(Date:7/31/2014)... Held at the Stanford Cancer Center, the ... the disease and its treatment. Survivors will find information ... as updates on the state-of-the-art with respect to newer ... organizing this educational opportunity,” says KCA CEO Bill Bro, ... colleagues have put together a program that balances the ...
(Date:7/31/2014)... The global market for molecular diagnostics ... according to a new study by Grand View Research, ... the subsequent introduction of advanced cancer diagnostic technologies are ... the next six years. Moreover, the growing global base ... coupled with disease triggering lifestyle habits such as smoking ...
(Date:7/31/2014)... July 31, 2014 “Rapid technological ... across the U.S., increasing unemployment, depressing American consumer ... It is a Catch 22—we need automated manufacturing ... means fewer jobs,” says economist and corporate relocation ... Corporate Top 10 Pro-Business States for 2014, co-published ...
Breaking Biology Technology:Smith & Nephew scores a HAT-TRICK with its entry into the high-growth hammer toe repair market 2Smith & Nephew scores a HAT-TRICK with its entry into the high-growth hammer toe repair market 3Smith & Nephew scores a HAT-TRICK with its entry into the high-growth hammer toe repair market 4Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 2Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 3Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 4Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 5ITRA Global Affiliate’s Pollina Corporate Top 10 Pro-Business States Minimize the Impact of Automation on Middle Class and Unemployment 2ITRA Global Affiliate’s Pollina Corporate Top 10 Pro-Business States Minimize the Impact of Automation on Middle Class and Unemployment 3ITRA Global Affiliate’s Pollina Corporate Top 10 Pro-Business States Minimize the Impact of Automation on Middle Class and Unemployment 4
... of Eli Lilly,and Company employees in nearly 50 nations ... community needs in celebration of Lilly,s,first-ever Global Day of ... place on one day., Beginning at sunrise in ... donating time and energy to improve the health and,well-being ...
... 14 Sagent Pharmaceuticals, Inc.,a privately-held specialty pharmaceutical ... the American Red Cross to assist the victims,of ... part of the global community, we were saddened ... Sichuan province," said Jeffrey M. Yordon,chief executive officer, ...
... /PRNewswire-FirstCall/ - Vasogen Inc.,(NASDAQ: VSGND ; TSX:VAS) today ... present a Company overview at the Rodman & ... at 12:30 p.m. local time (6:30,a.m. ET) on ... of the presentation can be accessed through Vasogen,s,website ...
Cached Biology Technology:Lilly Employees from Nearly 50 Nations Participate in Company's First-Ever Global Day of Service 2Vasogen to Webcast Presentation at the Rodman & Renshaw 5th Annual Global Healthcare Conference 2Vasogen to Webcast Presentation at the Rodman & Renshaw 5th Annual Global Healthcare Conference 3