Earth

Research shows that reported oil sands emissions greatly underestimated

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Solving a physics mystery: Those 'solitons' are really vortex rings

The same physics that gives tornadoes their ferocious stability lies at the heart of new University of Washington research, and could lead to a better understanding of nuclear dynamics in studying fission, superconductors and the workings of neutron stars.

The work seeks to clarify what Massachusetts Institute of Technology researchers witnessed when in 2013 they named a mysterious phenomenon — an unusual long-lived wave traveling much more slowly than expected through a gas of cold atoms. They called this wave a "heavy soliton" and claimed it defied theoretical description.

Diamond film possible without the pressure

Perfect sheets of diamond a few atoms thick appear to be possible even without the big squeeze that makes natural gems.

Scientists have speculated about it and a few labs have even seen signs of what they call diamane, an extremely thin film of diamond that has all of diamond's superior semiconducting and thermal properties.

New maps highlight habitat corridors in the tropics

Falmouth, Mass. – A team of Woods Hole Research Center (WHRC) scientists created maps of habitat corridors connecting protected areas in the tropics to incorporate biodiversity co-benefits into climate change mitigation strategies. Drs. Patrick Jantz, Scott Goetz, and Nadine Laporte describe their findings in an article entitled, "Carbon stock corridors to mitigate climate change and promote biodiversity in the tropics," available online in the journal Nature Climate Change on January 26.

New scientific field looks at the big picture

EAST LANSING, Mich. -- Big data is changing the field of ecology. The shift is dramatic enough to warrant the creation of an entirely new field: macrosystems ecology.

Quasi-particle swap between graphene layers

Belgian scientists have used a particle physics theory to describe the behaviour of particle-like entities, referred to as excitons, in two layers of graphene, a one-carbon-atom-thick honeycomb crystal. In a paper published in EPJ B, Michael Sarrazin from the University of Namur, and Fabrice Petit from the Belgian Ceramic Research Centre in Mons, studied the behaviour of excitons in a bilayer of graphene through an analogy with excitons evolving in two abstract parallel worlds, described with equations typically used in high-energy particle physics.

Communities prepared to be resettled for sake of conserving tigers

Undertaken by researchers from the University's Durrell Institute for Conservation and Ecology (DICE), the research evaluates the ecological and habitat needs of wildlife in the region and the socio-economic needs and priorities of the local forest-dependent community, known as the Gujjars.

The research aims to provide an objective framework for conservationists and policymakers to prioritise efforts in order to reach their goal of doubling tiger numbers by 2022.

Physicists at Mainz University build pilot prototype of a single ion heat engine

Scientists at Johannes Gutenberg University Mainz (JGU) and the University of Erlangen-Nuremberg are working on a heat engine that consists of just a single ion. Such a nano-heat engine could be far more efficient than, for example, a car engine or a coal-fired power plant. A usual heat engine transforms heat into utilizable mechanical energy with the corresponding efficiency of an Otto engine amounting to only about 25 percent, for instance. The proposed nano-heat engine consisting of a single calcium ion would be much more efficient.

Nature can, selectively, buffer human-caused global warming

Jerusalem, February 2, 2014 – Can naturally occurring processes selectively buffer the full brunt of global warming caused by greenhouse gas emissions resulting from human activities?

Yes, find researchers from the Hebrew University of Jerusalem, Johns Hopkins University in the US and NASA's Goddard Space Flight Center.

As the globe warms, ocean temperatures rise, leading to increased water vapor escaping into the atmosphere. Water vapor is the most important greenhouse gas, and its impact on climate is amplified in the stratosphere.

Osteoporosis screening recommendations may miss two-thirds of women aged 50 to 64

FINDINGS:

Women who are 65 and older routinely undergo bone-density testing to screen for osteoporosis. But for those between the ages of 50 and 64, it has been unclear who should be screened.

Researchers sought to determine how well the current screening strategy recommended by the U.S. Preventive Services Task Force — the independent expert panel appointed by the federal government to review and recommend various screenings — would perform in identifying candidates in this age range for screening.

Down to EARTH: Interview with Department of the Interior Secretary, Sally Jewell

Alexandria, VA – EARTH Magazine sits down with Secretary of the Interior Sally Jewell to discuss the role of geoscience at the Department of the Interior, including the National Park Service, the U.S. Geological Survey and the Bureau of Ocean Energy Management, which oversees offshore development of both renewable and conventional energy resources.

To calculate long-term conservation pay off, factor in people

Paying people to protect their natural environment is a popular conservation tool around the world – but figure out that return on investment, for both people and nature, is a thorny problem, especially since such efforts typically stretch on for years.

"Short attention-span worlds with long attention-span problems" is how Xiaodong Chen, a former Michigan State University doctoral student now on faculty at the University of North Carolina-Chapel Hill sums it up.

Diagnosis just a breath away with new laser

University of Adelaide physics researchers have developed a new type of laser that will enable exciting new advances in areas as diverse as breath analysis for disease diagnosis and remote sensing of critical greenhouse gases.

UD catalyst can convert CO2 to CO with 92 percent efficiency

A team of researchers at the University of Delaware has developed a highly selective catalyst capable of electrochemically converting carbon dioxide — a greenhouse gas — to carbon monoxide with 92 percent efficiency. The carbon monoxide then can be used to develop useful chemicals.

The researchers recently reported their findings in Nature Communications.

Quicker method paves the way for atomic-level design

A new X-ray method will enable the development of more efficient catalysts. The method opens up new opportunities to work on atomic level in a number of areas of materials science. Researchers from Lund University are among those behind the new method.

The new X-ray method is used to determine the atomic structure of the surface of different materials. The goal of the present research is to understand how catalysts work at atomic level – both the catalytic converters used for vehicle emissions control in cars and catalysts used in industry.