University of Oregon-led team uses a new approach to directly measure submarine melt, uncovering data that could enhance projections of sea level changes

University of Oregon

VIDEO: Video made from time-lapse photos taken daily from March 31, 2016, to Aug. 8, 2016 from LeConte Glacier camp. The glacier moves from right to left, with the ice front,… view more

Credit: Video by Jason Amundson, University of Alaska Southeast

EUGENE, Ore. — July 25, 2019 — Researchers have developed a new method to allow for the first direct measurement of the submarine melt rate of a tidewater glacier, and, in doing so, they concluded that current theoretical models may be underestimating glacial melt by up to two orders of magnitude. Read more

A team led by researchers out of NASA’s Goddard Space Flight Center in Greenbelt, Maryland, has confirmed traces of water vapor above the surface of Jupiter’s icy moon Europa.

And that’s a big deal as the tiny space rock is one of the highest priority targets in NASA’s search for extraterrestrial life, according to the agency.

“While scientists have not yet detected liquid water directly, we’ve found the next best thing: water in vapor form,” lead researcher and NASA planetary scientist Lucas Paganini said in a NASA statement. Read more

As the world’s cities grow to depend increasingly on underground water for drinking and domestic use, better methods are needed to keep it safe from contamination, the CleanUp 2011 conference heard today.

The contaminants of groundwater can be mixed with the local water supply without proper sanitation.

Underground barriers – known as permeable reactive barriers or PRBs – offer a reliable and affordable way to prevent industrial and other forms of toxic pollution from entering the water supply, says Scott Warner, Vice President and Principal Hydrogeologist with the international engineering and project management company AMEC which has offices worldwide and in Australia.

“PRB technology was first applied commercially in California in 1994, and today there are more than 200 barriers installed across North America, Europe, Japan, and Australia,” Mr Warner says. “It is now an accepted and proven technology for passively treating a wide variety of chemicals, including organic solvents, metals, and radionuclides.” Read more

Slow-motion collisions of tectonic plates under the ocean drag about three times more water down into the deep Earth than previously believed, according to a seismic study that spans the Mariana Trench.

The observations from the deepest ocean trench in the world have important implications for the global water cycle, researchers say.

“People knew that subduction zones could bring down water, but they didn’t know how much water,” says Chen Cai, who recently completed his doctoral studies at Washington University in St. Louis and is first author of the paper, which appears in Nature. Read more

Scientists have reached a new low in the cooling of liquid water, hitting -45 degrees Celsius (-49 degrees Fahrenheit). That’s way below the usual freezing point, and shows we still have a lot to learn about the physics of this plentiful substance.

In two separate experiments, water was supercooled right down to 230 Kelvin and 227.7 Kelvin, which is -43.15°C (-45.67°F) and -45.45°C (-49.81°F), respectively.

At these kind of extreme temperatures, it’s almost as if water becomes two different types of liquid, the scientists say – fluctuating between two different states in the same way that we might deliberate over a decision. Read more