Mathematics – Logic
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993sci...259..910k&link_type=abstract
Science (ISSN 0036-8075), vol. 259, no. 5097, p. 910, 911.
Mathematics
Logic
1
Mars, Hypotheses, Water, Atmosphere, Climate, Surface, Features, Ice, Origin, Formation, Flooding, Flow, Glaciation, Volcanism, Heating, Greenhouse Effect, Carbon Dioxide
Scientific paper
The conventional view of Mars is that, during the past 3 billion years, the atmosphere has been so thin and cold that the planet's water has remained locked up underground as ice. However, Baker et al. (1991) proposed a radically different and far-reaching alternative: a Mars that is periodically shrouded in an earthlike atmosphere, with a temporary ocean and massive ice sheets. This hypothesis was proposed in order to explain the assortment of surface features sent back by the Viking spacecraft in 1970, such as huge channels, apparent ocean shorelines, and possible glacial landforms. To support this hypothesis, Baker and his coworkers invoked a spate of catastrophic floods, all cutting their channels at the same geological moment due a great outburst of Mars's volcanic activity which could have melted some subsurface ice and belched out CO2. This gas, together with some additional CO2 released as the water interacted with the surface, caused a strong greenhouse warming, causing melting of underground ice and the formation of an ocean.
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