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:12/22/2014)... DUBLIN , Dec. 22, 2014 Research and ... the addition of the "The Global Watermarking ... http://photos.prnewswire.com/prnh/20130307/600769 ... global digital media watermarking and fingerprinting markets. Watermarking ...
(Date:12/19/2014)... DUBLIN , Dec. 18, 2014 Research and Markets ... "Micro Market Monitor: North America Perimeter Security Systems Market" ... http://photos.prnewswire.com/prnh/20130307/600769 The North American perimeter security market ... 2014 to 2019. Although the U.S. market holds a larger ...
(Date:12/17/2014)... Markets ( http://www.researchandmarkets.com/research/s6qzt5/samsung_galaxy_s5 ) has announced the ... Button Synaptics Fingerprint Sensor Technology Analysis" report to ... Based on a totally different sensing technology ... time a fingerprint sensor in its product. ...
Breaking Biology News(10 mins):The Global Watermarking and Fingerprinting Markets 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2
... RIVERSIDE, Calif. University of California, Riverside scientists released ... (ACP) yesterday on campus to help control the spread of ... $1.1 billion citrus industry and citrus trees in home landscapes. ... been released in California. UC Riverside Executive Vice Chancellor ...
... knows about the hazard of decompression sickness (DCS) or "the bends." ... were absorbed by the body during the dive, come out of ... to form in the body. DCS causes many symptoms, and its ... death. , But how do marine mammals, whose very survival depends ...
... goalie, and two opposing players are breaking in alone on ... the linesman skating in on your left, but pay him ... two approaching players. As the action unfolds, how is your ... your focus of attention into multiple "spotlights?" Are you using ...
Cached Biology News:UC Riverside scientists release natural enemy of Asian citrus psyllid 2UC Riverside scientists release natural enemy of Asian citrus psyllid 3UC Riverside scientists release natural enemy of Asian citrus psyllid 4Study examines how diving marine mammals manage decompression 2How do we split our attention? 2
(Date:1/23/2015)... Biofertilizers stimulate microbial activities in soil. These ... through the activities in the soil or in the ... the stress on reducing environmental pollution and on reducing ... and segments the bio fertilizers market with analysis and ...
(Date:1/22/2015)... January 22, 2015 Eckert & Ziegler ... Spectrometry (AMS) services to the pharmaceutical and biotech industry, ... the company in the position of Director of Science ... broad and valuable experience in drug metabolism and bioanalysis ...
(Date:1/22/2015)... GEA Niro Soavi the leader in ... the PandaPLUS 2000, which is ideal for new applications ... cell disruption . This compact laboratory homogenizer is the ... food, food additives and ingredients as well as for ...
(Date:1/22/2015)... The laboratory information management systems market ... number of technological advancements due to factors such as ... to integrate healthcare systems, and increasing government support for ... integration. Key players in the market focus on technological ...
Breaking Biology Technology:Biofertilizers Market Expected to Reach $1,649.7 Million by 2019 - New Report By MarketsandMarkets 2Biofertilizers Market Expected to Reach $1,649.7 Million by 2019 - New Report By MarketsandMarkets 3Biofertilizers Market Expected to Reach $1,649.7 Million by 2019 - New Report By MarketsandMarkets 4Eckert & Ziegler Vitalea Science appoints Mark Seymour, PhD as Director of Science & Technology 2Eckert & Ziegler Vitalea Science appoints Mark Seymour, PhD as Director of Science & Technology 3GEA Niro Soavi Announces the PandaPLUS 2000 Homogenizer for Processing New Applications for Nanoemulsions and Cell Disruption 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 4
... Introduces RESPeRATE Hypertension ... Device Into Country,s Retail Market, NEW YORK ... today announced that its RESPeRATE(R) hypertension treatment device,clinically-proven ... will launch into retail distribution in the United ...
... Lower Strength of Approved Constipation Drug Offers Potential Treatment ... Option to Americans Suffering from IBS-C, ... SCMP ) today announced that the supplemental,New Drug Application (sNDA) ... treatment of irritable bowel syndrome with,constipation (IBS-C) has been accepted ...
... , WHAT: DENTAL IMPLANT MARKET INSIGHTS ... presentation), WHEN: ... from Millennium Research Group, TO ENROLL: Please use the link below ... 416-364-7776 ext. 123 Millennium Research Group ...
Cached Biology Technology:InterCure and Mashco Announce Launch into Independent Pharmacies in the United Kingdom 2InterCure and Mashco Announce Launch into Independent Pharmacies in the United Kingdom 3InterCure and Mashco Announce Launch into Independent Pharmacies in the United Kingdom 4FDA Accepts Sucampo's sNDA for Lubiprostone (8 mcg) for the Treatment of Irritable Bowel Syndrome with Constipation (IBS-C) 2FDA Accepts Sucampo's sNDA for Lubiprostone (8 mcg) for the Treatment of Irritable Bowel Syndrome with Constipation (IBS-C) 3FDA Accepts Sucampo's sNDA for Lubiprostone (8 mcg) for the Treatment of Irritable Bowel Syndrome with Constipation (IBS-C) 4FDA Accepts Sucampo's sNDA for Lubiprostone (8 mcg) for the Treatment of Irritable Bowel Syndrome with Constipation (IBS-C) 5Dental Implant Market Insights Webinar 2
... High Sensitivity Laboratory Osmometer for both 0.2 and 2.0 mL samples for freezing ... record keeping. Bar code reading capability with optional scanner. RS-232 port. ... ... ...
Secure-Seal™ hybridization chamber gasket, eight chambers, 9 mm diameter, 0.8 mm deep *set of 20*...
sodium channel, nonvoltage-gated 1 alpha,...
RAT ANTI MOUSE F4/80 ANTIGEN:BIOTIN Immunogen: Thioglycollate stimulated peritoneal macrophages from C57/BL mice...
Biology Products: