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Environment

Warm water seeping under Antarctic ice sheets may accelerate melting

As ice melts beneath Antarctica, warm ocean water can intrude further inland and set off more melting, in what researchers say is an unrecognised tipping point

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PTG8E9 Snowplow removes snow off icy road in winter

Environment

Grit salt on our roads is killing freshwater wildlife. What can we do?

Features

Ice might be ubiquitous, but we are still discovering things about it

Earth

Ice might be ubiquitous, but we are still discovering things about it

Comment

Physics

Springy ice seen for the first time may explain how clouds make rain

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Environment

Ozone layer treaty pushed back ice-free Arctic summers up to 15 years

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The ice sheet near Pituffik, Greenland

Earth

Next 10,000 years of Greenland ice sheet could be decided this century

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Icefin under Antarctica’s Thwaites ice shelf

Video

Melt rate of Antarctic 'doomsday glacier' slowed by freshwater layer

Video

Part of the setup for creating medium density amorphous ice

Physics

Entirely new type of ice made using extremely cold steel balls

News

Satellite image of Jakobshavn glacier,

Environment

Engineering firms explore plan to slow melting of Greenland glacier

News

Original Caption Released with Image: The puzzling, fascinating surface of Jupiter's icy moon Europa looms large in this newly-reprocessed color view, made from images taken by NASA's Galileo spacecraft in the late 1990s. This is the color view of Europa from Galileo that shows the largest portion of the moon's surface at the highest resolution. The view was previously released as a mosaic with lower resolution and strongly enhanced color (see PIA02590). To create this new version, the images were assembled into a realistic color view of the surface that approximates how Europa would appear to the human eye. The scene shows the stunning diversity of Europa's surface geology. Long, linear cracks and ridges crisscross the surface, interrupted by regions of disrupted terrain where the surface ice crust has been broken up and re-frozen into new patterns. Color variations across the surface are associated with differences in geologic feature type and location. For example, areas that appear blue or white contain relatively pure water ice, while reddish and brownish areas include non-ice components in higher concentrations. The polar regions, visible at the left and right of this view, are noticeably bluer than the more equatorial latitudes, which look more white. This color variation is thought to be due to differences in ice grain size in the two locations. Images taken through near-infrared, green and violet filters have been combined to produce this view. The images have been corrected for light scattered outside of the image, to provide a color correction that is calibrated by wavelength. Gaps in the images have been filled with simulated color based on the color of nearby surface areas with similar terrain types. This global color view consists of images acquired by the Galileo Solid-State Imaging (SSI) experiment on the spacecraft's first and fourteenth orbits through the Jupiter system, in 1995 and 1998, respectively. Image scale is 1 mile (1.6 kilometers) per pixel. North on Europa is at right. The Galileo mission was managed by NASA's Jet Propulsion Laboratory in Pasadena, California, for the agency's Science Mission Directorate in Washington. JPL is a division of the California Institute of Technology, Pasadena. Additional information about Galileo and its discoveries is available on the Galileo mission home page at http://solarsystem.nasa.gov/galileo/. More information about Europa is available at http://solarsystem.nasa.gov/europa. Image Credit: NASA/JPL-Caltech/SETI Institute

Space

Shards of pure ice might snow upwards beneath the ice shell of Europa

The moons Europa and Enceladus probably have global oceans buried beneath their frozen shells, and those seas may be home to a strange kind of ice called frazil ice

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Environment

Feedback loop in Greenland amplified ice melt from warm weather

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Life

Polar bears adapting to climate change by hunting on freshwater ice

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Earth

Vast reservoir of water discovered under the ice in Antarctica

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Space

We now know how the mysterious ridges covering Europa’s surface formed

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