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:10/16/2014)... – Post-menopausal women experienced improvements in vaginal atrophy, ... genital bleeding, after 12 weeks of daily 10 ... germ-based nutritional supplement previously shown to help relieve ... pilot study reported in a poster at the ... , "These data documented improved vaginal epithelium, ...
(Date:10/15/2014)... book ,Models of Life, is a non-traditional biophysics textbook ... The book is a journey of discovery into biological ... life and biological regulation. It is about how our ... communication between the billions of cells in an organism. ... relationships between principles, which can be found on both ...
(Date:10/15/2014)... NXT-ID, Inc. (NASDAQ: NXTD and NXTDW) ... growing mobile commerce market releases photos and video of the recent ... October 13 th . Gino Pereira , ... angel investor Mr. Chad A. Verdi rang the bell.  ... his investors and employees "for their work and dedication in bringing ...
Breaking Biology News(10 mins):S-equol supplements associated with improved measures of reproductive health in postmenopausal women 2New book about life as seen from physics 2Photo Release: NXT-ID Inc. Rings Opening Bell of the NASDAQ Stock Market October 13th 2Photo Release: NXT-ID Inc. Rings Opening Bell of the NASDAQ Stock Market October 13th 3
... time that several common species of seaweeds in both the ... chemical means. While competition between seaweed and ... of coral reefs worldwide, this chemical threat may provide a ... Seaweeds are normally kept in check by herbivorous fish, but ...
... hard winter for Monarch butterflies, according to Chip Taylor, director ... that low temperatures, storms and habitat destruction have all threatened ... a lot of time fretting over the status of the ... that will help me understand the past as a way ...
... from Rensselaer Polytechnic Institute will send an army of ... of preventing the formation and spread of biofilms, or ... the health of astronauts. The Micro-2 experiment, led ... Chemical and Biological Engineering at Rensselaer, is scheduled to ...
Cached Biology News:Researchers offer first proof that chemicals from seaweeds damage coral on contact 2Researchers offer first proof that chemicals from seaweeds damage coral on contact 3Researchers offer first proof that chemicals from seaweeds damage coral on contact 4As monarch butterflies journey north, gardeners can help protect species, researcher says 2Rensselaer researchers to send bacteria into orbit aboard space shuttle Atlantis 2
(Date:10/22/2014)... , Oct. 22, 2014  Actavis plc (NYSE: ... and Rhythm, a biopharmaceutical company, today announced that Actavis ... wholly owned subsidiary, Rhythm Health, Inc., which is developing ... of diabetic gastroparesis and other GI functional disorders. ... trial of relamorelin for the treatment of diabetic gastroparesis ...
(Date:10/22/2014)... Involution Studios , a healthcare software design ... Understanding Ebola . The goal of the ... follow informative tool for anyone wanting to know more ... , "As the news has spread in all directions ... not only a healthcare crisis with global impact, but ...
(Date:10/22/2014)... 2014 Physicians Choice Laboratory Services ... menu, which enables healthcare providers to individualize therapeutic ... evidence-based results, healthcare providers are better able to ... while minimizing risks for adverse drug reactions and ... the FDA [1] more than 2.2 million adverse ...
(Date:10/22/2014)... , Oct. 22, 2014 Nuvilex, Inc. ... approximately 400 million people worldwide are living with diabetes, ... people by 2030.  The global market for diabetes treatments ... approximately 330,000 people worldwide died from pancreatic cancer.  Pancreatic ... due to cancer in the United States ...
Breaking Biology Technology:Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 2Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 3Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 4Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 5Involution Studios' Ebola Infographic Provides Key Disease Information and Statistics at a Glance 2PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 2PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 3Nuvilex Brief Analyst Report: Thinking Outside the Box by BrokerBank Securities, Inc. 2
... SAN DIEGO, Nov. 2 Cardium Therapeutics (NYSE Amex: ... 510(k) premarket notification with the U.S. Food and Drug ... product candidate. Excellagen XL is an ... customized collagen-based topical gel designed for use by physicians ...
... and LONDON, Nov. 2 A study from Thomson Reuters ... far outpacing research activity in the rest of the world. ... within the next decade. , The study, Global ... collaboration potential of China and its current place in world ...
... Pharmasset, Inc. (Nasdaq: VRUS ) today announced that it ... the Study of Liver Diseases (AASLD) on Monday, November 2, ... review Pharmasset,s progress on the programs that are the subject ... of this event via the internet, log on to the ...
Cached Biology Technology:Cardium Announces Plans to File FDA 510(k) Application for U.S. Marketing Clearance of ExcellagenXL(TM) Gel for Diabetic, Pressure and Venous Ulcers and Other Topical Wounds 2Cardium Announces Plans to File FDA 510(k) Application for U.S. Marketing Clearance of ExcellagenXL(TM) Gel for Diabetic, Pressure and Venous Ulcers and Other Topical Wounds 3Cardium Announces Plans to File FDA 510(k) Application for U.S. Marketing Clearance of ExcellagenXL(TM) Gel for Diabetic, Pressure and Venous Ulcers and Other Topical Wounds 4China's Research Output More Than Doubled Since 2004, Thomson Reuters Study Reveals 2Pharmasset to Webcast an Investor Event from the AASLD Meeting 2Pharmasset to Webcast an Investor Event from the AASLD Meeting 3Pharmasset to Webcast an Investor Event from the AASLD Meeting 4
Umbilical cord blood neutrophils, For immunohistochemistry (IHC)...
...
Adjustable tilt angle 0 to 20 Adjustable speed of 3-25 RPM Load capacity: 2.7 kg (6 lbs.) Ambient temperature range 4C to 65C Low voltage power is supplied by wall mount transformer...
... Clean spin filters allow for the rapid isolation ... your DNA gel slice in the spin filter, ... your DNA is recovered. There is no need ... buffers. Spin filters can also be used for ...
Biology Products: