news 2012


Earth Sciences

Results 81 - 100 of 130.

Earth Sciences - 12.06.2012
Ancient story of Dartmoor tors has an ice-cold twist
Ice extended further across the UK than previously thought and played a part in sculpting the rocky landscape of Dartmoor in South West England during the last Ice Age, according to new research which challenges previously held theories. A study of the National Park area of Dartmoor, UK, shows for the first time that an ice cap andá valley glaciers were present in its centre and that the naturally castellated stone outcrops, known as tors, were survivors.

Environment - Earth Sciences - 12.06.2012
Measuring the
Measuring the "Other" Greenhouse Gases: Higher Than Expected Levels of Methane in California
New research from Lawrence Berkeley National Laboratory (Berkeley Lab) has found that levels of methane-a potent greenhouse gas emitted from many man-made sources, such as coal mines, landfills and livestock ranches-are at least one-and-a-half times higher in California than previously estimated.

Earth Sciences - 11.06.2012
New research to help scientists better predict underwater volcanic eruptions
New research to help scientists better predict underwater volcanic eruptions
A team of scientists studying last year's eruption of Axial Seamount now says that the undersea volcano some 250 miles off the Oregon coast gave off clear signals hours before the eruption. The findings, plus those from scientists who mapped the lava flow, are published this week in three separate articles Geoscience.

Physics - Earth Sciences - 07.06.2012
Mars crater shows evidence for climate evolution
Mars crater shows evidence for climate evolution
ESA's Mars Express has provided images of a remarkable crater on Mars that may show evidence that the planet underwent significant periodic fluctuations in its climate due to changes in its rotation axis. On 19 June 2011, Mars Express pointed its high-resolution stereo camera at the Arabia Terra region of Mars, imaging the Danielson and Kalocsa craters.

Life Sciences - Earth Sciences - 06.06.2012
Dinosaurs lighter than previously thought
Dinosaurs lighter than previously thought
Scientists have developed a new technique to accurately measure the weight and size of dinosaurs and discovered they are not as heavy as previously thought. University of Manchester biologists used lasers to measure the minimum amount of skin required to wrap around the skeletons of modern-day mammals, including reindeer, polar bears, giraffes and elephants.

Earth Sciences - 24.05.2012
Autopsy of a eruption: Linking crystal growth to volcano seismicity
Autopsy of a eruption: Linking crystal growth to volcano seismicity
A forensic approach that links changes deep below a volcano to signals at the surface is described by scientists from the University of Bristol in a paper published today in Science. The research could ultimately help to predict future volcanic eruptions with greater accuracy. Using forensic-style chemical analysis, Kate Saunders and colleagues directly linked seismic observations of the deadly 1980 Mount St. Helens eruption to crystal growth within the magma chamber, the large underground pool of liquid rock beneath the volcano.

Earth Sciences - Physics - 23.05.2012
Geological record shows air up there came from below
The influence of the ground beneath us on the air around us could be greater than scientists had previously thought, according to new research that links the long-ago proliferation of oxygen in Earth's atmosphere to a sudden change in the inner workings of our planet.

Environment - Earth Sciences - 16.05.2012
Research focused on underground solution to greenhouse gas challenges
While many are focusing on atmospheric solutions to reduce greenhouse gases, some researchers are setting their sights on the ground - deep underground. Li Li , an assistant professor of energy and mineral engineering at Penn State, is investigating geologic carbon sequestration (storing carbon dioxide deep beneath the surface of the Earth) as a way to reduce the amount of carbon dioxide in the atmosphere.

Earth Sciences - 15.05.2012
Seafloor volcanoes surprise
Seafloor volcanoes surprise
Volcanoes on the seafloor can grow or collapse tens of metres in just a few days, a new study has found, suggesting that that the seabed is much more unstable than previously thought. Researchers, led by Professor Tony Watts of Oxford University's Department of Earth Sciences, report how they surveyed the topography of the active Monowai volcano, a submarine volcano on the southwest Pacific Ocean floor near Tonga, in May and June 2011.

Environment - Earth Sciences - 10.05.2012
Mississippi Kept Deepwater Horizon Oil Slick Off Shore
Mississippi Kept Deepwater Horizon Oil Slick Off Shore
When the Deepwater Horizon drilling rig exploded April 20, 2010, residents feared that their Gulf of Mexico shores would be inundated with oil. And while many wetland habitats and wildlife were oiled during the three-month leak, the environmental damage to coastal Louisiana was less than many expected, in part because much of the crude never made it to the coast.

Earth Sciences - Physics - 10.05.2012
Researchers Gain Greater Insight into Earthquake Cycles
Researchers Gain Greater Insight into Earthquake Cycles
For those who study earthquakes, one major challenge has been trying to understand all the physics of a fault—both during an earthquake and at times of "rest"—in order to know more about how a particular region may behave in the future. Now, researchers at the California Institute of Technology (Caltech) have developed the first computer model of an earthquake-producing fault segment that reproduces, in a single physical framework, the available observations of both the fault's seismic (fast) and aseismic (slow) behavior.

Environment - Earth Sciences - 09.05.2012
Antarctic ice sheet on brink of change
A project to map part of the West Antarctic Ice Sheet has shown that the region may be on the threshold of change. Scientists from the University have mapped the ice-covered, largely unexplored landscape from the air. They uncovered a deep sub-glacial basin close to the edge of the ice sheet near the Weddell sea.

Physics - Earth Sciences - 09.05.2012
Technology Developed at Caltech Measures Martian Sand Movement
Technology Developed at Caltech Measures Martian Sand Movement
Last year, images from NASA's Mars Reconnaissance Orbiter captured sand dunes and ripples moving across the surface of Mars—observations that challenged previously held beliefs that there was not a lot of movement on the red planet's surface. Now, technology developed by a team at the California Institute of Technology (Caltech) has allowed scientists to measure these activities for the very first time.

Earth Sciences - Life Sciences - 08.05.2012
Plastic Trash Altering Ocean Habitats, Scripps Study Shows
Plastic Trash Altering Ocean Habitats, Scripps Study Shows
SEAPLEX researchers collected an alarming amount of small bits of broken down plastic floating across thousands of miles of open ocean. Photo credit: Scripps Institution of Oceanography at UC San Diego A 100-fold upsurge in human-produced plastic garbage in the ocean is altering habitats in the marine environment, according to a new study led by a graduate student researcher at Scripps Institution of Oceanography at UC San Diego.

Earth Sciences - Physics - 07.05.2012
Geoscientists watch Sierra Nevada grow in real time
Scientists at the University of Glasgow have been collaborating with colleagues at the University of Nevada, Reno to watch the Sierra Nevada mountain range grow in real time. Using cutting-edge measurement technology, they have concluded that the range, which stretches for 400 miles between California and Nevada, is rising at a relatively fast rate of one to two millimetres each year.

Earth Sciences - 30.04.2012
’Rock clock’ sheds new light on size and frequency of Yellowstone super-eruptions
A volcanic super-eruption in America's Yellowstone National Park two million years ago was actually two smaller eruptions 6,000 years apart, new research has revealed. Scientists at the Scottish Universities Environmental Research Centre (SUERC) and Washington State University in the USA have used a 'rock clock' dating technique to more precisely determine when volcanic rock samples from the Huckleberry Ridge Tuff were created.

Physics - Earth Sciences - 27.04.2012
Finding a new Earth: holy grail of astronomy
Finding a new Earth: holy grail of astronomy
Determining the habitability of rocky, Earth-like planets in the universe will be crucial for us as a species, according to scientists from The Australian National University. But the good news is that these planets are probably more abundant than stars, researchers from the ANU Planetary Science Institute have discovered.

Environment - Earth Sciences - 20.04.2012
Study suggests shale-gas development causing rapid landscape change
UNIVERSITY PARK, Pa. As the Marcellus natural-gas play unfolds in Pennsylvania, several trends are becoming increasingly clear, according to researchers at Penn State. First, most of the development is occurring on private land, and the greatest amount of development falls within the Susquehanna River basin.

Earth Sciences - 20.04.2012
Looking inside the Earth
Looking inside the Earth
Defects found in rocks below the Earth's surface have a major impact on the transmission of seismic waves, such as those caused by earthquakes, researchers at The Australian National University have discovered. Professor Ian Jackson, from the Research School of Earth Sciences, part of the ANU College of Physical and Mathematical Sciences, said the team's research allows us to better understand the way seismic waves travel through the mantle deep below the Earth's surface.

Physics - Earth Sciences - 19.04.2012
Far-off cousin of part-time African lake found on Titan
Far-off cousin of part-time African lake found on Titan A region on Saturn's moon Titan has been found to be similar to the Etosha Pan in Namibia, Africa. Both are ephemeral lakes - large, shallow depressions that sometimes fill with liquid. Ontario Lacus is the largest lake in the southern hemisphere of Saturn's moon, Titan.