Study addresses feedbacks to climate change
Significantly more carbon is stored in the worlds soils than is present in the atmosphere. In a process called a "positive feedback," global warming may stimulate decomposition of soil organic matter, thus releasing heat-trapping carbon dioxide gas to the atmosphere, possibly causing the rate of global warming to increase further. Disagreement exists, however, regarding the effects of climate change on global soil carbon stocks. Eric Davidson, a senior scientist at the Woods Hole Research Center, has written a review paper that clarifies the issues regarding temperature sensitivity of decomposition within a framework that helps to focus the ensuing debate and research. Co-authored with Ivan Janssens of the University of Antwerpen (Belgium), the study is being published in an upcoming issue of Nature.
According to Dr. Davidson, interest in this topic is high because of its importance in the global carbon cycle and potential feedbacks to climate change. "The arctic, in particular, is experiencing very rapid warming, causing permafrost to melt and some peatlands to dry out, thus potentially exposing huge stocks of previously frozen and waterlogged carbon to decomposition. We need to understand how much of this carbon that is stored in soils, peatlands, and permafrost is susceptible to loss in a warmer world. If you unplug your refrigerator, you can demonstrate that your food, which is basically organic matter, spoils more quickly when it is warm. However, because the soil is a complex mixture of minerals and organic matter derived from plant leaves and roots, soil scientists and ecologists have had difficulty teasing out the conditions and types of organic matter that respond significantly to temperature changes." The review paper by Davidson and Janssens sets forth a description of how both the chemical complexity of carbon molecules and the soil conditions in which they are found determine the rates at which they decompose.
Elizabeth Braun | EurekAlert!
The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung
A sudden drop in outdoor temperature increases the risk of respiratory infections
11.01.2017 | University of Gothenburg
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences