While Mars harbors substantial water ice at its poles, future human missions favor landing sites closer to the equator where solar power is more reliable and temperatures are less extreme.
Methodology and Findings
The Planetary Science Institute (PSI), led by Hanna Sizemore and Samuel Courville, has released two new papers presenting global maps of subsurface water ice. Researchers combined orbital radar and neutron spectrometer measurements with statistical techniques to estimate the probability of ice at various depths.
The resulting maps highlight zones with a high likelihood of underground ice, particularly at mid-latitudes, and delineate areas where ice is less probable. The authors note that current uncertainties remain significant and that targeted in‑situ measurements are required to improve the maps.
To increase confidence, the scientists propose deploying ground‑penetrating radar and neutron instruments on future landers or rovers, complemented by repeated orbital passes with enhanced radar antennas. Such data would be essential for selecting landing sites where astronauts could extract water for life support and fuel production.