Using the 'SHARAD' ground-penetrating radar on the Mars Reconnaissance Orbiter, scientists have compiled the definitive map of subsurface water ice on the Red Planet, identifying 'buried glaciers' in the mid-latitudes.
Accessible Ice Deposits
The map reveals that vast quantities of water ice—enough to fill Lake Superior—are located just centimeters below the dust in regions like Arcadia Planitia. This is crucial because these mid-latitude regions receive enough sunlight for solar power, unlike the ice-rich poles.
In-Situ Resource Utilization (ISRU)
This ice is the key to human survival. It provides drinking water and oxygen, but more importantly, it is the feedstock for creating Methane rocket fuel (via the Sabatier reaction) for the return trip to Earth. This reduces the mission mass launch requirement by 90%.
Geologic History
The purity of the ice suggests it was deposited as snow during previous orbital cycles when Mars had a higher axial tilt, preserving a climate record of the planet spanning millions of years.
Landing Site Selection
Space agencies and private companies are now using this map to select the exact coordinates for the first human landing sites, prioritizing access to these 'ice mines'.
