Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

France and Australia resume Southern Ocean carbon dioxide research

19.10.2004


French and Australian scientists resume measurements of Antarctic waters south of Australia this week to assess their capacity as a massive oceanic sponge to absorb greenhouse gases and store them away for hundreds or perhaps thousands of years.



France and Australia have a joint research program taking measurements from the Antarctic supply ship L’Astrolabe during its voyages between Hobart and the French base at Dumont D’Urville. L’Astrolabe, equipped with a full sampling laboratory, sails from Hobart on Tuesday 19 October in the first voyage of the season. Professor Alain Poisson from the University of Paris and Dr Bronte Tilbrook from CSIRO oversee the research.

Later in the year the ice breaker Aurora Australis will head south from Fremantle to make a similar set of measurements and to extend the work to the west of the Astrolabe track. "The Southern Ocean is so important for controlling the concentration of carbon dioxide in the atmosphere," Dr Tilbrook says. "The Astrolabe work is helping us obtain a much clearer picture of the interaction between ecosystems and mixing that drives the carbon dioxide exchange between the ocean and atmosphere."


Dr Tilbrook was a co-author on new research published earlier this year in the journal Science examining the role of the world’s oceans in the global carbon cycle. "The results show the oceans contain about 48 per cent of fossil fuel emissions and more than half of the storage occurs in the Southern Hemisphere," Dr Tilbrook says. "Before now we had to rely on models to understand ocean carbon storage. Now we have values based on carbon measurements. "This is a big step forward in understanding how the earth system has responded to increases in atmospheric carbon dioxide and is helping to work out what might happen in future."

Prof Alain Poisson, from the University of Paris, has been working in the Southern Ocean alongside CSIRO scientists for the past 10 years. "We have to know the evolution of the oceans and atmosphere," he says. "This area is crucial because if something happens here it will react on the global climate." The 65-metre L’Astrolabe, has become a key platform in this international project. Safely stowed below deck on the former oil-rig tender, Australian and French scientists work in a converted container measure gases above and below the ocean surface.

With only limited shipping entering the Southern Ocean results from the joint monitoring program are being watched closely by climate scientists. Just two years old, the joint French and Australian research project involves constant sampling of the Southern Ocean along the 1000km route south. Dr Tilbrook said the results show that the region around Australia has a fairly significant impact on the ocean capacity for uptake and storage.

"Most of the Southern Hemisphere storage occurs in the sub-Antarctic region, which includes the waters along Australia’s southern shores," he says. "Deep water with low anthropogenic carbon concentrations upwells off Antarctica and the ocean circulation carries the water north. The surface waters absorb anthropogenic carbon dioxide as they move north. In the sub-Antarctic region the waters become dense enough to sink below the surface and carry the anthropogenic carbon dioxide away from contact with the atmosphere. "The circulation pattern is like a giant conveyor belt and helps drive the ocean capacity to take up carbon dioxide."

A new series of internationally coordinated research expeditions which includes the Astrolabe and Aurora Australis work are planned through the major oceans to identify how the storage is changing with time.

Greenhouse 2005, the most significant climate change conference in Australia - http://www.greenhouse2005.com/

Craig Macaulay | EurekAlert!
Further information:
http://www.greenhouse2005.com/
http://www.csiro.au

More articles from Ecology, The Environment and Conservation:

nachricht Dry landscapes can increase disease transmission
20.06.2018 | Forschungsverbund Berlin e.V.

nachricht 100 % Organic Farming in Bhutan – a Realistic Target?
15.06.2018 | Humboldt-Universität zu Berlin

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>