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- CRISM: Compact Reconnaissance Imaging Spectrometer for Mars
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Tag Archives: climate
Shifting sands
Sand — in wind-blown ripples, drifts, and dunes — lies all over Mars. But it poses a puzzle because the current atmosphere is too thin (less than 1% of Earth’s) to move that much sand around. So researchers in the … Continue reading
Valley networks were eroded quckly
Networks of valleys cross much of the ancient surface of Mars, and along with deltas and other features these all show that the environment once warm and wet enough to sustain liquid water at the surface. But when? And for … Continue reading
Martian surface: icy, cold, and dry for 4 billion years
Maybe the warm and wet environment on early Mars that scientists have long proposed wasn’t at the surface, but rather buried in the crust. That’s one of the conclusions of a new review that looks at Martian clay minerals and … Continue reading
Jarosite: key to ancient temperatures?
The water-related mineral jarosite is occurs both on Earth and in sediments on Meridiani Planum, Mars. Scientists have found that by measuring the isotope ratio of argon-40 to argon-39 in the rock — a technique that can be applied to … Continue reading
Posted in Reports
Tagged climate, jarosite, Mars Exploration Rovers, MER, Opportunity, temperature, water
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Did lake-effect storms make Martian snowbelts?
Numerous places on Mars show erosion by precipitation, whether as rainfall or runoff from melting snow. The precipitation could have come from a thicker atmosphere or a temporary boost in atmospheric temperature and density following a large impact. Both scenarios … Continue reading
Posted in Reports
Tagged atmosphere, climate, Echus Chasma, Juventae Chasma, lakes, rain, snow, storms, Valles Marineris, water
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