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Tag Archives: CO2
Small amounts of CO2 can get Mars gullies flowing
[Editor’s note: From a paper by Tjalling de Haas and six co-authors recently published in the Journal of Geophysical Research.] Initiation and Flow Conditions of Contemporary Flows in Martian Gullies • We use RAMMS to back calculate initial and flow … Continue reading
Posted in Reports
Tagged CO2, debris flows, gullies, Hale Crater, mass wasting, particle flows
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Weathering on early Mars bad for forming carbonates
[Editor’s note: From a paper by Fabien Baron and three co-authors recently published in the Journal of Geophysical Research.] New Constraints on Early Mars Weathering Conditions From an Experimental Approach on Crust Simulants • Chemical weathering in mildly acidic conditions … Continue reading
Comet chemistry suggests way to get breathable oxygen on Mars
Science fiction stories are chock full of terraforming schemes and oxygen generators for a very good reason—we humans need molecular oxygen (O2) to breathe, and space is essentially devoid of it. Even on other planets with thick atmospheres, O2 is … Continue reading
Mars hasn’t enough CO2 for terraforming
A new study of the quantity of carbon dioxide on Mars has compiled a planet-wide inventory of the CO2 it holds in all its accessible reservoirs: atmosphere, ice, and locked up in surface carbonate rocks and other potential sources. The … Continue reading
Posted in Reports
Tagged atmosphere, atmospheric escape, atmospheric pressure, carbon dioxide, carbonate minerals, CO2, Mars Atmosphere and Volatile EvolutioN, MAVEN, NASA, terraforming, University of Colorado
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Curiosity findings from Yellowknife Bay sharpen CO2 paradox of ancient Mars climate
Mars scientists are wrestling with a problem. Ample evidence says ancient Mars was sometimes wet, with water flowing and pooling on the planet’s surface. Yet, the ancient sun was about one-third less warm and climate modelers struggle to produce scenarios … Continue reading
Posted in Reports
Tagged Aeolis Mons, atmosphere, CO2, Curiosity, faint young Sun paradox, Gale Crater, lakes, life, Mars Science Laboratory, Mount Sharp, MSL, NASA, Sheepbed member, water, Yellowknife Bay
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Was nitrogen in the early Mars atmosphere a key to ancient habitability?
Scientists have long suspected that ancient Mars had a thicker atmosphere and temperatures warmer and far more habitable than at present. But modelers have difficulties making the numbers come out right,
Posted in Reports
Tagged atmosphere, carbon dioxide, climate, climate change, CO2, early Mars, habitability, N2, nitrogen, water, water vapor
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