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:


(Date:4/26/2016)... BANGALORE, India and LONDON ... Infosys Finacle, part of EdgeVerve Systems, a ... ), and Onegini today announced a partnership to ... banking solutions.      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ... banks to provide their customers enhanced security to ...
(Date:4/19/2016)... DUBAI , UAE, April 20, 2016 ... can be implemented as a compact web-based "all-in-one" system ... in the biometric fingerprint reader or the door interface ... requirements of modern access control systems. The minimal dimensions ... the ID readers into the building installations offer considerable ...
(Date:4/15/2016)... 15, 2016 Research and ... Biometrics Market 2016-2020,"  report to their offering.  , ... , ,The global gait biometrics market is expected ... the period 2016-2020. Gait analysis generates ... be used to compute factors that are not ...
Breaking Biology News(10 mins):
(Date:5/3/2016)... ... 2016 , ... In a list published by the Boston Business Journal, ... companies; a small percentage of the state's 615,000+ small businesses. The list examined companies ... revenue from 2012 to 2015. , As this award comes on the ...
(Date:5/3/2016)... ... May 03, 2016 , ... ... the sensor and data driven conferences, will take place on June 7-8, 2016, at the New ... Vidya Raman-Tangella on incorporating technology -- including AR/VR, machine learning, apps, robotics and AI ...
(Date:5/3/2016)... Los Angeles, Calif (PRWEB) , ... May 03, ... ... network of industry leading fertility clinics and IVF laboratories. A contingency of reproductive ... Fertility™ to treat men and women experiencing infertility and to help them build ...
(Date:5/2/2016)... PA (PRWEB) , ... May 02, 2016 , ... ... proud to report on the pre-launch success of their revolutionary, veterinarian-designed product for ... cats to stalk, trap, and play with their food the way nature intended. ...
Breaking Biology Technology:
Cached News: