A new study reveals that glaciers on Mars, previously thought to be mostly rock, are actually composed of more than 80% pure water ice.
Why it matters: This discovery challenges previous assumptions about Mars’ glaciers and provides valuable insights into the planet’s climate history and potential resources for future human exploration.
The details:
- Researchers from the Weizmann Institute of Science and the Planetary Science Institute analyzed five Martian glaciers using radar data from NASA’s Mars Reconnaissance Orbiter.
- By measuring the glaciers’ dielectric properties and loss tangent, they determined the ice-to-rock ratio within the glaciers.
- The study found a surprising consistency in the purity of the glaciers across different hemispheres, suggesting uniform environmental conditions during their formation and preservation.
- The ice likely formed through snowfall or direct condensation of frost on the ground, rather than through the diffusion of water vapor into the subsurface.
The global consistency in the properties of the Martian glaciers suggests that Mars experienced either one widespread glaciation or multiple glaciations with similar properties.
What they’re saying:
- “We found a surprising consistency in the purity of these glaciers. All the sites we examined can be described as relatively pure ice deposits, perhaps more than 80% ice, beneath a rock or dust covering.” – Oded Aharonson, study co-author and professor at the Weizmann Institute of Science
- “Different techniques had been applied by researchers to various sites, and the results could not be easily compared. One of the sites in our study had never been studied, and at two of the five sites we used, only partial analysis had been completed previously.” – Isaac Smith, study co-author and senior scientist at the Planetary Science Institute
The implications: Understanding the formation and maintenance of these glaciers is crucial for scientific research and planning future Mars missions that may rely on local water resources for survival.
What’s next: The researchers plan to analyze more glaciers on Mars to further understand the ice content across the planet and refine global data on the planet’s climate history and potential resources for future exploration.
