Physics
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977kosis..15..901m&link_type=abstract
Kosmicheskie Issledovaniia, vol. 15, Nov.-Dec. 1977, p. 901-922. In Russian.
Physics
3
Climatology, Planetary Atmospheres, Planetary Evolution, Primitive Earth Atmosphere, Terrestrial Planets, Atmospheric Models, Carbon Dioxide, Mars Atmosphere, Venus Atmosphere, Water
Scientific paper
The primitive stages of evolution of the atmospheres and climates of the earth, Mars and Venus are studied on the basis of the following assumptions: (1) the solar constant increased gradually during the whole history of the planets, its initial level being 60% that of the present-day level, (2) degasification took place uniformly, and (3) initial pressure was low (less than about 0.1 atm). The basic conclusions are that: (1) liquid water appeared on the earth surface during the first several hundred million years, (2) a slower degasification and less heat received from the sun explain why liquid water appeared on Mars later - about one or two billion years ago, and (3) the present-day physical conditions on Venus can be explained simply if it is assumed that the primitive material from which the planet was formed contained little water.
Moroz Vasiliy Ivanovich
Mukhin Lev M.
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