In today's world, with global warming, soil carbon reserves are in the spotlight. Certain research programmes are looking to boost those reserves, and it was this issue that prompted a team from CIRAD and its partners to develop a way of mapping soil carbon reserves that is more accurate than those often used in the past. The method takes account of data relating to both land use and environmental parameters.
It was developed in India, at the centre of one of the 25 hot spots defined by biodiversity protection specialists. The new method comprises two stages. In the first, existing data are used to establish a model that subsequently serves to estimate carbon reserves depending on environmental parameters: location, geological substrate, physiographic information, plant cover and soil composition (gravel, clay, loam, sand, and obviously carbon).
In the case of India, these parameters were established for 361 soil profiles representing 1643 soil horizons selected based on numerous surveys and studies in the zone. The parameters were used to compile a database for the model. The model was then coupled with a geographic information system (GIS) containing maps of the same environmental parameters, so as to calculate carbon reserves at any point in the zone. The results obtained from these data for the different ecosystems encountered confirmed the mean values quoted by the Intergovernmental Panel on Climate Change (IPCC). The method can also be used for other geographical zones, provided the relevant database is available for the zone in question.
The tool serves to support decision-making with a view to protecting the environment as regards the carbon issue. In particular, it can take account of changes in land use, which was not the case with the methods often used in the past. These changes obviously have to be taken into account when thinking about carbon management.
The method was developed and tested as part of a joint project by CIRAD and the National Bureau of Soil Survey and Land Use Planning in Bangalore (India), funded by the Centre franco-indien pour la promotion de la recherche avancée (CEFIPRA). The project set out to study the impact of the steps taken to conserve forests and the biodiversity they contain on changes in soil carbon reserves over the past 20 years. In the next stage of the project, researchers will be comparing the reserves calculated for a recent date (1999) with a previous date (1977), so as to assess the variations linked to changes in land use.
Helen Burford | alfa
Researchers discover natural product that could lead to new class of commercial herbicide
16.07.2018 | UCLA Samueli School of Engineering
Advance warning system via cell phone app: Avoiding extreme weather damage in agriculture
12.07.2018 | Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
18.07.2018 | Materials Sciences
18.07.2018 | Life Sciences
18.07.2018 | Health and Medicine