Methane is an extremely potent greenhouse gas. Wetlands, gas hydrates, permafrost, termites, oceans, freshwater bodies, non-wetland soils, are all natural sources of atmospheric methane; however, the majority of methane presence ca n be accredited to human-related activities.
These activities include: such as fossil fuel production, biomass burning, waste management and animal husbandry. The release of methane into the atmosphere by cattle and other large grazing mammals is estimated to account for 12 to 17% of the total global methane release.
Recently, scientists developed a methane release measuring technique as way of tracking the discharge of the gas without disrupting the regular management of the herd. This is part of a collaborative research study conducted by researchers from Agriculture and Agri-Food Canada's Lethbridge Research Centre, the Commonwealth Scientific and Industrial Research Organization, and the University of Melbourne in Australia.
Cattle were fitted with global positioning devices to track their movements and wind speed and direction were constantly measured. Unlike previous studies in which a few cattle were handled daily and methane measurements were taken directly, this technique centered on using open-path lasers to obtain a short-term measurement of methane release from an entire grazing herd. For instance in one study, the technique was used to take repeated measurements of methane concentration every 10 minutes directly above the height of the 18 cattle in the paddock. According to the results, the technique developed so well it can account for 77% of methane release at a single point in a paddock.
Sean McGinn, the author of the study describes the technique as a "significant advancement in assessing greenhouse gas emissions from the cattle industry."
Collaborative research is continuing to further measure methane release from other agricultural sources. The full study is published in the January/February 2011 issue of the Journal of Environmental Quality.
Sara Uttech | EurekAlert
Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University
New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien
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...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
07.12.2016 | Health and Medicine
07.12.2016 | Life Sciences
07.12.2016 | Health and Medicine