NASA - Mars Reconnaissance Orbiter (MRO) logo.
June 5, 2018
In early Martian summer, at the time NASA's Mars Reconnaissance Orbiter acquired this image, the dunes are almost free of their seasonal ice cover. Only pockets of ice protected in the shade most of the day remain. The North Pole of Mars is surrounded by a vast sea of sand dunes. In this dune field, the dunes are covered by a seasonal cap of dry ice in the winter.
Peeling Back Layers of a Martian Polar Ice Cap (Artist Concept)
Video above: This artist's animation illustrates how NASA's Mars Reconnaissance Orbiter used radar to map the insides of the north polar ice cap on Mars. Video credits: NASA/JPL-Caltech/University of Rome/SwRI.
Mars Reconnaissance Orbiter (MRO),: http://www.nasa.gov/mission_pages/MRO/main/index.html
Image, Video (mentioned), Text, Credits: NASA/Yvette Smith/JPL-Caltech/Univ. of Arizona.