Sastrugi

Believe it or not, here’s something else to see in Antarctica! They are snow and ice dunes known as ‘sastrugi’, and are formed on a snow surface by wind erosion and deposition. They differ from sand dunes in that the ridges are parallel to the prevailing winds. These particular sastrugi are unusually large. NASAs Atmospheric Sciences Data Center says: Usually sastrugi are only several centimeters high and several meters apart, but large portions of East Antarctica are covered by mega-sastrugi ice fields, with dune-like features as high as four meters separated by two to five kilometers. The mega…

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