This polar projection shows the amount of hydrogen (believed to be indicative of water ice) at and around the north pole of Mars.LANL/ W.C. Feldman et al.
The colors of this map represent the amount of 'water-equivalent hydrogen' found beneath the surface of Mars. Mass percentages of water were determined from epithermal neutron counting rates using the neutron spectrometer aboard Mars Odyssey between February 2002 and April 2003. The color-coded map is overlaid on a relief map derived from topography data from the Mars Global Surveyor. Less water appears at the south pole because a seasonal cap of carbon dioxide ice covers much of it. Click here to open a new window with a full-resolution view of this image.
LANL / W.C. Feldman et al.

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