29 July 2015

Dusty comet releases mysterious clumps

Dusty comet releases mysterious clumps

Images of an unusually dusty comet have revealed strange streaming clumps that could hold the secrets to how comets create their beautiful, sweeping, striated tails.

Comet C/2011 L4 barged into the research of solar physicist Nour E. Raouafi when he was studying the sun using images from the SECCHI/HI-1 telescope aboard the solar-observing spacecraft STEREO-B.

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22 July 2015

Warmer air, less sea ice lead to mercury decline in Arctic Ocean

Warmer air, less sea ice lead to mercury decline in Arctic Ocean

The amount of mercury in the Arctic Ocean is declining as the region rapidly warms and loses sea ice, according to a new study.

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21 July 2015

Study: Most rain comes from ice clouds

Study: Most rain comes from ice clouds

Benjamin Franklin was the first to surmise that, even on a hot summer’s day, the raindrops falling on our heads might begin life as ice particles at high altitudes. In the centuries since 1780 it became possible to probe the atmosphere directly by balloon and by aircraft, and remotely from the ground and from satellites. These observations confirmed Franklin’s suspicion. However, two questions remain: how large are the fractions of rain produced by liquid clouds and by ice clouds? And how variable are they over the globe and over time?

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20 July 2015

Warming slow-down not the end of climate change, study shows

Warming slow-down not the end of climate change, study shows

A slow-down in global warming is not a sign that climate change is ending, but a natural blip in an otherwise long-term upwards trend, research shows.

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15 July 2015

Greenland’s fjords are far deeper than previously thought, and glaciers will melt faster, researchers find

Greenland’s fjords are far deeper than previously thought, and glaciers will melt faster, researchers find

West Greenland’s fjords are vastly deeper than rudimentary models have shown, allowing intruding ocean water to badly undercut glacier faces, which will raise sea levels around the world much faster than previously estimated. Those are the findings of a University of California-Irvine-led research team that battled rough waters and an onslaught of icebergs for three summers to map the remote channels for the first time.

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29 June 2015

Beijing quadrupled in size in a decade, new study finds

Beijing quadrupled in size in a decade, new study finds

A new study shows that Beijing quadrupled in physical extent between 2000 and 2009. The new buildings alone — not including the impacts of additional city dwellers and their cars — increased heat and changed wind and pollution patterns in a ring around Beijing.

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9 June 2015

New Tool Could Track Space Weather 24 Hours Before Reaching Earth

New Tool Could Track Space Weather 24 Hours Before Reaching Earth

Our sun is a volatile star: explosions of light, energy and solar materials regularly dot its surface. Sometimes an eruption is so large it hurls magnetized material into space, sending out clouds that can pass by Earth’s own magnetic fields, where the interactions can affect electronics on satellites, GPS communications or even utility grids on the ground.

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3 June 2015

Rebuilding Sandbars in the Grand Canyon

Sandbar on the Colorado River - 65 miles

The Grand Canyon is a bit closer to how it was before one of the country’s largest dams was installed upstream. Three years of releasing water from Glen Canyon Dam to generate controlled floods has resulted in rebuilding sandbars in the Grand Canyon, according to a new USGS article published in Eos, the daily Earth and space science website published by the American Geophysical Union. These simulated floods redistribute sand and mud, which helps develop this critical feature.

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2 June 2015

Flooding, erosion risks rise as Gulf of Mexico waves loom larger

Flooding, erosion risks rise as Gulf of Mexico waves loom larger

Waves in the northern Gulf of Mexico are higher than they were 30 years ago, contributing to a greater risk of coastal erosion and flooding in Florida, Alabama, Mississippi and Louisiana, according to a new study.

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29 May 2015

A shrinking Mercury is contracting in unexpected ways

A shrinking Mercury is contracting in unexpected ways

A global survey of the largest, most prominent fault scarps has revealed some unexpected wrinkles in the way Mercury has contracted.

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