Navigation Links
Scientist links increase in greenhouse gases to changes in ocean currents
Date:6/17/2010

KNOXVILLE -- By examining 800,000-year-old polar ice, scientists increasingly are learning how the climate has changed since the last ice melt and that carbon dioxide has become more abundant in the Earth's atmosphere.

For two decades, French scientist Jrme Chappellaz has been examining ice cores collected from deep inside the polar ice caps of Greenland and Antarctica. His studies on the interconnecting air spaces of old snow -- or firn air -- in the ice cores show that the roughly 40 percent increase of carbon dioxide in the atmosphere since the Earth's last deglaciation can be attributed in large part to changes in the circulation and biological activity of the oceanic waters surrounding Antarctica.

Chappellaz presented his findings today in Knoxville, Tenn. during the Goldschmidt Conference, an international gathering of several thousand geochemists who converge annually to share their research on Earth, energy and the environment. The event, hosted by the University of Tennessee, Knoxville, and Oak Ridge National Laboratory, is taking place June 13-18.

By measuring the carbon isotopes in the firn air, scientists can pinpoint the source of atmospheric carbon during the millennia. Because living organisms at the surface of the oceans tend to take up the lighter of the carbon isotopes, 13C, and this isotope is then released when the organisms decay, scientists know the higher concentration of 13C is originating from the oceans.

Normally, the organisms die, sink to the ocean depths, and decompose, releasing carbon that remains stored in the cold, deep waters for centuries. But a growing concentration of the isotope 13C in the air during the last deglaciation indicates that this "old" carbon from decomposition was released from the southern polar waters, where the Antarctic Circumpolar Current transports more water than any other current in the world. Here, oceanic circulation is increasing in intensity and the deep water is
'/>"/>

Contact: Whitney Holmes
wholmes7@utk.edu
865-974-5460
University of Tennessee at Knoxville
Source:Eurekalert

Page: 1 2

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)... Dec. 8, 2014 You,ve been here before: you ... can,t remember your password, site key or the answer to ... first grade teacher? Today, Hoyos Labs ... app that will finally put an end to the frustration ... TM . 1U leverages a user,s smartphone to acquire ...
(Date:12/10/2014)... 2014 CIE San Diego has launched an ... connective tissue that enhances care coordination among social service ... client-level information; earned a second $1 million grant from ... seniors aging in community and; will be recognized as ... th 4-6p. CIE San Diego today ...
(Date:12/5/2014)... , Dec. 4, 2014 Increased emphasis ... investments in new testing and inspection technologies. The ... rise to a range of innovative test solutions. ... of Generation Y, which is generally more inclined ... result, product development strategies of test equipment vendors ...
Breaking Biology News(10 mins):The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4
... a remote region of the Russian mountains a previously unknown ... Lead Scientist Professor Hans Cornelissen and his Russian-Dutch team describe ... root belongs to the small alpine plant Corydalis conorhiza and ... through layers of snow. Given this novel behaviour, the scientists ...
... In a study published in the open-access, peer-reviewed ... Han and Piotr Jablonski at Seoul National University, Korea, ... their genitalia from males, forceful copulatory attempts, females of ... the evolutionary arms race between the sexes. Instead, females ...
... are acclaimed in representing natural climate archives. For ... of these annual rings depend mainly on temperature and ... seasonal variations, the correlation is not so evident. ... Geosciences and their colleagues of the Australian National University ...
Cached Biology News:Newly discovered snow roots are 'evolutionary phenomenon' 2Hidden genitalia in female water striders makes males 'sing' 2Australia's climate: Drought and flooding in annual rings of tropical trees 2
(Date:12/24/2014)... 23, 2014 According to Ross Selinger, President ... of ITRA Global, the national office market continues to be ... This is evidenced by the third quarter’s surprising 3.9% GDP, ... Low energy costs have held inflation down and the Fed ... the housing market remaining soft. , This solid economic news ...
(Date:12/24/2014)... Pipette.com announces their Holiday in the ... their #HolidayInTheLab pictures for a chance to win pipette-themed ... those struggling to think of a holiday gift for ... Lab Contest provides the ideal holiday presents. The #HolidayInTheLab ... pictures of their chemistree, holiday sweaters, as well as ...
(Date:12/24/2014)... LOUIS , Dec. 23, 2014 ... today that the waiting period under the Hart-Scott-Rodino ... the acquisition expired on December 22, 2014, thereby ... review requirement for the acquisition of the Company ... U.S. antitrust clearance satisfies another condition to closing ...
(Date:12/22/2014)... , Dec. 22, 2014   Synthetic ... developer of pathogen-specific therapies for serious infections ... the microbiome, today announced positive topline safety ... clinical trial of SYN-004, the Company,s investigational ... Clostridium difficile (C. difficile) infection, ...
Breaking Biology Technology:ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3Major Pipette Distributor Pipette.com Announces their Holiday in the Lab Contest 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 2Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 4Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 5
... Genachowski will serve as the next FCC Chair; Mr. ... , WASHINGTON, June 15 TechNet, the bipartisan political ... innovation economy, today hailed the nominations of Julius Genachowski ... Commission (FCC) and strongly urged the U.S. Senate Commerce ...
... Influenza Vaccine Is Nearly Completed , , BEIJING, June 15 ... a leading developer and provider of vaccines in China, announced today ... necessary to produce a virus antigen. , , Sinovac ... (CDC) on June 8, 2009 and started the H1N1 vaccine production ...
... Cadient Group , the premier strategic ... it was ranked second on the Philadelphia Business ... in the Greater Philadelphia Region for the second year in ... in the healthcare and life sciences industries, we are proud ...
Cached Biology Technology:TechNet Urges Swift U.S. Senate Approval of FCC Nominees Julius Genachowski and Robert McDowell 2TechNet Urges Swift U.S. Senate Approval of FCC Nominees Julius Genachowski and Robert McDowell 3Sinovac Completes Construction of H1N1 Virus Seed Bank 2Sinovac Completes Construction of H1N1 Virus Seed Bank 3Digital Healthcare Specialist Cadient Group Ranked #2 on List of Full-service Advertising Agencies in the Philadelphia Region 2
Human Legumain Affinity Purified Polyclonal Ab...
Human Cystatin F MAb (Clone 292103)...
... is an inhibitor of ... concentration of inhibitor required ... must be determined empirically ... micromolar inhibitor is sufficient ...
Human RELT/TNFRSF19L Affinity Purified Polyclonal Ab...
Biology Products: