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
Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter
17.08.2017 | Swansea University
Climate change: In their old age, trees still accumulate large quantities of carbon
17.08.2017 | Universität Hamburg
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
21.08.2017 | Materials Sciences
21.08.2017 | Health and Medicine
21.08.2017 | Materials Sciences