Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Risk of even greater climate change

The impact that emissions have on the climate partly depends on the land carbon cycle, i.e. how carbon dioxide is absorbed by the biosphere. However, there are other feedback mechanisms within ecosystems that are not included in today’s climate models and that could add to climate change in the future.

It is important to take into account these biogeochemical feedbacks in research on climate change, according to an international research group led by ecosystems researcher Almut Arneth from Lund University.

The research group has assembled an overview of the current knowledge on this subject, which has been published in Nature Geoscience on 25 July 2010. In it they describe a range of mechanisms that are linked to a warmer climate: increased carbon dioxide and methane emissions from wetlands, emissions of nitrogen oxides from the ground, emissions of volatile organic compounds from forests, and emissions of gases and soot from fires.

These mechanisms affect the amount of greenhouse gases in the lower atmosphere, including ozone, which not only has an impact on the climate but which also impacts negatively on vegetation and people. These mechanisms become stronger as the temperature rises, while they also contribute to warming the climate.

“A number of these mechanisms have not been well researched. In some cases, we know all too little about how they influence one another, for example how changes in the nitrogen cycle affect the uptake of carbon dioxide by vegetation. Together these could be very significant for the climate”, says Almut Arneth.

Vegetation absorbs carbon dioxide and this currently slows down the rise in temperature caused by the emissions. However, in a warmer climate this ‘damper’ does not work as well and this could mean a significant reduction in the absorption of carbon dioxide by vegetation in the future, in addition to increased release of other climate-active gases.

In a warming climate, the help currently provided by vegetation to slow climate change could become smaller and smaller, say the researchers behind the article in Nature Geoscience. Therefore, their view is that these feedback mechanisms must be taken into account in the calculations in future climate models.

The work has formed part of iLEAPS/IGBP, the Integrated Land Ecosystem-Atmosphere Processes Study from the International Geosphere-Biosphere Programme.

For more information please contact Almut Arneth,

Ingemar Björklund | idw
Further information:

More articles from Earth Sciences:

nachricht Jacobs University supports new mapping of Mars, Mercury and the Moon
21.03.2018 | Jacobs University Bremen gGmbH

nachricht Thawing permafrost produces more methane than expected
20.03.2018 | GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

TRAPPIST-1 planets provide clues to the nature of habitable worlds

21.03.2018 | Physics and Astronomy

The search for dark matter widens

21.03.2018 | Materials Sciences

Natural enemies reduce pesticide use

21.03.2018 | Life Sciences

Science & Research
Overview of more VideoLinks >>>