Computer Science
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977stin...7811961m&link_type=abstract
"Early stages in the evolution of the atmosphere and climate on the Earth-group planets Transl. into ENGLISH of "O Rannivkh Eta
Computer Science
Mars Atmosphere, Planetary Atmospheres, Planetary Evolution, Venus Atmosphere, Atmospheric Composition, Earth Atmosphere, Terrestrial Planets
Scientific paper
The early evolution of the atmospheres and climate of the Earth, Mars and Venus is discussed, based on a concept of common initial conditions and main processes (besides known differences in chemical composition and outgassing rate). It is concluded that: (1) liquid water appeared on the surface of the earth in the first few hundred million years; the average surface temperature was near the melting point for about the first two eons; CO2 was the main component of the atmosphere in the first 100-500 million years; (2) much more temperate outgassing and low solar heating led to the much later appearance of liquid water on the Martian surface, only one to two billion years ago; the Martian era of rivers, relatively dense atmosphere and warm climate ended as a result of irreversible chemical bonding of CO2 by Urey equilibrium processes; (3) a great lack of water in the primordial material of Venus is proposed; liquid water never was present on the surface of the planet, and there was practically no chemical bonding of CO2; the surface temperature was over 600 K four billion years ago.
Moroz Vasiliy Ivanovich
Mukhin Lev M.
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