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, firstname.lastname@example.org.
Ingemar Björklund | idw
Predicting unpredictability: Information theory offers new way to read ice cores
07.12.2016 | Santa Fe Institute
Sea ice hit record lows in November
07.12.2016 | University of Colorado at Boulder
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
09.12.2016 | Life Sciences
09.12.2016 | Ecology, The Environment and Conservation
09.12.2016 | Health and Medicine