Martian Ice: A Find Just a Meter Deep ⚡ экспресс
Imagine that on Mars, beneath a thin layer of dry soil, lies a layer of pure ice—like frost in an old freezer. Scientists figured out that this ice has survived from times when the planet was tilted more and snow accumulated on the surface. New modeling shows: the ice layer is younger than 4 million years, and its depth matches observations. Could future Martian colonies dig down to it?
Beneath a thin layer of red dust on Mars lies water ice. Its presence was confirmed by the Phoenix lander and orbital instruments, but the mystery remained: why is the ice always just a few centimeters below the surface?
The answer lies in the wobbles of Mars' axial tilt. When the tilt is high, water vapor from the poles falls as frost in the mid-latitudes. As the tilt decreases, the frost sublimates, leaving behind dust. A porous crust forms — a dust blanket that slows the evaporation of the remaining ice.
Climate modeling revealed: ice deposited around 630,000 years ago now sits at a depth of 25–150 cm, matching observations. The conclusion: subsurface ice is young — less than 4 million years old. Without the dust blanket, it would vanish in centuries. But the crust acts as a self-regulator: the stronger the evaporation, the thicker the protection, and the ice persists for millions of years. For colonists, this means: water is nearby, no need to dig deep.
🎯 On Mars, ice behaves like dry ice on a theater stage: it slowly evaporates, skipping the liquid phase, leaving only a dusty trail.
🎬 In the movie 'The Martian,' the hero extracts water from the soil — exactly as can be done with subsurface ice on Mars.