In the Arctic, enhanced vegetation growth amplifies global warming. On the Tibetan Plateau, however, the situation is the reverse.
“The trend in Tibet is the opposite of what we are seeing in the Arctic,” says Professor Deliang Chen from the University of Gothenburg. “By restoring grasslands there, the climate can be improved – both locally and globally.”
In the Arctic, warming increases like a spiral. Global warming means that the periods of growth are becoming longer and vegetation growth is increasing. At the same time, heat transfer to the Arctic from lower latitudes is rising, reducing sea ice there, and this in turn is contributing towards a faster local rise in temperature.
A new research study published in the highly respected research journal PNAS shows that the situation is the reverse on the Tibetan Plateau.
Vegetation on the Tibetan Plateau has also increased as a result of global warming. However, in contrast to the Arctic areas, the longer periods of growth and the increased vegetation activity here appear to mean that global warming is being weakened.
“The reason for this is that increased evapotranspiration from plants is cooling the air,” explains Deliang Chen, Professor of Physical Meteorology at the University of Gothenburg.
The climate models also simulate daytime cooling as a result of the increased vegetation, albeit with a smaller magnitude than currently observed.
“Our results suggest that actions to restore native grasslands in degraded areas, roughly one-third of the plateau, will both facilitate a sustainable ecological development in this region and bring local and global climate benefits.”
More accurate simulations of the biophysical coupling between the land surface and the atmosphere are needed to help fully understand regional climate change over the Tibetan Plateau.
Link to article: http://www.pnas.org/content/112/30/9299.abstract
For more information, please contact:
Deliang Chen, August Röhss Professor at the Department of Earth Sciences
Tel.: +46 (0)31 786 4813, e-mail: firstname.lastname@example.org, http://rcg.gvc.gu.se/dc
Henrik Axlid | idw - Informationsdienst Wissenschaft
Upcycling 'fast fashion' to reduce waste and pollution
03.04.2017 | American Chemical Society
Litter is present throughout the world’s oceans: 1,220 species affected
27.03.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
26.04.2017 | Materials Sciences
26.04.2017 | Agricultural and Forestry Science
26.04.2017 | Physics and Astronomy