MarsNews.com
April 14th, 2015

Mars has belts of glaciers consisting of frozen water Astronomy Magazine

Mars has distinct polar ice caps, but the Red Planet also has belts of glaciers at its central latitudes in both the southern and northern hemispheres. A thick layer of dust covers the glaciers, so they appear as surface of the ground, but radar measurements show that underneath the dust there are glaciers composed of frozen water. New studies have now calculated the size of the glaciers and thus the amount of water in the glaciers. It is the equivalent of all of Mars being covered by more than 1 meter of ice.

Several satellites orbit Mars, and on satellite images, researchers have been able to observe the shape of glaciers just below the surface. For a long time, scientists did not know if the ice was made of frozen water (H2O) or of carbon dioxide (CO2) or whether it was mud. Using radar measurements from NASA’s Mars Reconnaissance Orbiter, researchers have been able to determine that it is water ice. But how thick is the ice, and do the glaciers resemble glaciers on Earth? A group of researchers at the Niels Bohr Institute have now calculated this using radar observations combined with ice flow modeling.

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