HOME >> BIOLOGY >> NEWS
Oxygen measurements yield greenhouse clues

As levels of the greenhouse gas carbon dioxide rise, concentrations of oxygen in our air have fallen.

CSIRO scientists have measured the minuscule decline in oxygen that has occurred during the past 20 years, the longest period over which such an assessment has been made.

"As fossil fuels burn, they generate carbon dioxide, using up oxygen in the process," explains Mr Ray Langenfelds from CSIRO Atmospheric Research. "About half of the carbon dioxide from fossil fuels remains in the atmosphere."

"The changes we are measuring represent just a tiny fraction of the total amount of oxygen in our air (20.95 per cent by volume). The oxygen reduction is just 0.03 per cent in the past 20 years and has no impact on our breathing," says Mr Langenfelds.

"Typical oxygen fluctuations indoors or in city air would be far greater than this," says Mr Langenfelds.

However the oxygen measurements shed new light on the extent to which the world's forests and oceans share the task of absorbing half the carbon dioxide generated by burning of fossil fuels.

"While the oceans emerge as the slightly larger long-term sink, plants are clearly soaking up more carbon dioxde with time. If they weren't, levels of carbon dioxide would be far higher," says Mr Langenfelds.

Although deforestation during the past 20 years has released vast quantities of carbon dioxide, remaining plants are taking up much of this gas. As plants photosynthesise, they produce oxygen, explaining why the oxygen decline in air has been less than expected.

Researchers speculate that plants today could be growing more rapidly due to warmer conditions, higher carbon dioxide concentrations or increased nitrogen fertilisation. Alternatively, previously cleared land may be returning to forest.

Mr Langenfelds has analysed air dating back to 1978 from CSIRO's unique 'archive' of pristine air collected at the remote Cape Grim Baseline Air Pollution Station operated by the CSIRO an
'"/>

Contact: Mr Ray Langenfelds
ray.langenfelds@dar.csiro.au
61-3-9239-4598
CSIRO Australia
19-Jul-1999


Page: 1 2

Related biology news :

1. Oxygen sensing in worms may hold key to healthy blood pressure in humans
2. Oxygen triggered the evolution of complex life forms
3. Oxygen deficiency is an endocrine disruptor in fish
4. Oxygen key switch in transforming adult stem cells from fat into cartilage
5. Evolution upset: Oxygen-making microbes came last, not first
6. Oxygen is toxic to stem cells
7. Tumor Oxygen Level And Blood Flow Fluctuate, Duke Scientists Discover
8. Fake Photosynthesis? Test-Tube System In Science Paper Sheds Light On The Oxygen We Breathe, UD Prof Says
9. Oxygen-Carrying Myoglobin Not Necessary For Survival
10. Stroke Risk Increased In Patients With High Oxygen Use In Brain
11. Improved Oxygen Bath To Heal Wounds, Lessen Number Of Amputations: Sandia To Sign Agreement With Numotech To Help Create Home-Use Healing Facility

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Oxygen measurements yield greenhouse clues

(Date:11/5/2014)... career to understanding the Earth,s climate and communicating ... deputy director and regional climatologist for the Western ... Redmond has more than three decades of experience ... data to the general public. , At its ... December 15-19, 2014 the American Geophysical Union (AGU) ...
(Date:11/4/2014)... 2014 – University of Utah engineers developed the first ... fuel produce electricity without needing to ignite the fuel. ... portable electronics, off-grid power and sensors. , A study ... American Chemical Society journal ACS Catalysis . , ... reaction between a fuel and an oxygen-rich source such ...
(Date:11/4/2014)... University School of Medicine announced today that it ... funded by the Bill & Melinda Gates Foundation. ... Gynecology and Reproductive Sciences; and Vice Chair of ... of Medicine will pursue an innovative global health ... to Assess Fetal Neurodevelopment.", Grand Challenges Explorations (GCE) ...
Breaking Biology News(10 mins):Nevada climatologist to be honored at AGU Fall Meeting for lifetime of public outreach 2Jet-fueled electricity at room temperature 2Temple University School of Medicine receives Grand Challenges Explorations grant 2
(Date:11/22/2014)... During his lifetime Richard L. Sharp was ... himself with great people and take risks to achieve ... marveled at his extraordinarily courageous attitude when taking on ... even with his death impending—that’s how he continued looking ... ultimately take his life. , Carrying on Sharp’s relentless ...
(Date:11/22/2014)... (PRWEB) November 21, 2014 RURO, ... solutions provider, has released Limfinity® version 5.1.4. , ... projects of Limfinity® than ever in RURO’s 8 ... and minority framework enhancement. Limfinity® version 5.1.4 is ... above and beyond bug fixes! , Limfinity® 5.1.4 ...
(Date:11/22/2014)... 22, 2014 Respiratory therapy students ... proper management of life-like respiratory ailments using the ... . Grand Rapids-based, Michigan Instruments Inc. developers of ... of the respiratory simulation units to the pro-gram, ... Valley and Muskegon Community College are collaborating to ...
(Date:11/21/2014)... Quebec , November 21, 2014 ... como responsable comercial   Mariano Rodríguez es ...   KLOX está en marcha para comenzar ... de cura de heridas de reciente aprobación en Europa   ... "la compañía") se complace al anunciar los siguientes nombramientos: ...
Breaking Biology Technology:Sherry Sharp, Wife of CarMax Founder, Richard Sharp, Accepts Seat on Board of Cure Alzheimer’s Fund 2Sherry Sharp, Wife of CarMax Founder, Richard Sharp, Accepts Seat on Board of Cure Alzheimer’s Fund 3RURO Announces Limfinity® version 5.1.4 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 3KLOX Technologies anuncia sus nombramientos ejecutivos 2KLOX Technologies anuncia sus nombramientos ejecutivos 3KLOX Technologies anuncia sus nombramientos ejecutivos 4KLOX Technologies anuncia sus nombramientos ejecutivos 5
Cached News: