Earth and Mars: Evolution of Atmospheres and Surface Temperatures

@article{Sagan1972EarthAM,
  title={Earth and Mars: Evolution of Atmospheres and Surface Temperatures},
  author={C. Sagan and G. Mullen},
  journal={Science},
  year={1972},
  volume={177},
  pages={52 - 56}
}
Solar evolution implies, for contemporary albedos and atmospheric composition, global mean temperatures below the freezing point of seawater less than 2.3 aeons ago, contrary to geologic and paleontological evidence. Ammonia mixing ratios of the order of a few parts per million in the middle Precambrian atmosphere resolve this and other problems. Possible temperature evolutionary tracks for Earth and Mars are described. A runaway greenhouse efect will occur on Earth about 4.5 aeons from now… Expand
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References

SHOWING 1-10 OF 38 REFERENCES
Sulfur Isotopes in Swaziland System Barites and the Evolution of the Earth's Atmosphere
TLDR
Sedimentary barites from the Swaziland System of South Africa have sulfur-34 ratios that are enriched by only 2.5 per mil with respect to contemporary sulfides, and it is proposed that oxygen pressure in the earth's atmosphere was very low and local oxidation occurred in a photosynthetic layer of the ocean. Expand
The long winter model of Martian biology - A speculation.
Abstract An estimated mean thickness ∼1 km of frost in the Martian North Polar Cap summer remnant, if vaporized, would yield ∼103 g cm−2 of atmosphere over the planet, higher global temperatures… Expand
A nongrey calculation of the runaway greenhouse: Implications for Venus' past and present☆
Abstract We obtain the dependence of the surface temperature of a planet covered with bodies of liquid water upon the amount of incident solar flux. To determine this relationship we carry out… Expand
Atmospheric and hydrospheric evolution on the primitive earth. Both secular accretion and biological and geochemical processes have affected earth's volatile envelope.
Biospheric, hydrospheric, lithospheric and atmospheric evolution on primitive earth, discussing secular accretion and biological and geochemical processes effect on volatile envelope
Chemical events on the primitive Earth.
  • P. Abelson
  • Chemistry, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1966
TLDR
The hypothesis of an early methane-ammonia atmosphere is found to be without solid foundation and indeed is contraindicated, and arguments concerning feasible components support the view that amino acids and proteins preceded sugars and nucleic acids. Expand
Age of the Transition in the Pre-Cambrian Atmosphere
RECENTLY published age determinations1,2 together with other figures3 from British Guiana can be used to give more information about the Pre-Cambrian atmosphere. Rutten4 has suggested that a… Expand
Thermodynamic Equilibria in Planetary Atmospheres
Thermodynamic equilibrium composition of all combinations of C, H, O and N at average pressure and temperature calculated for atmospheres of earth, Venus, Mars and Jupiter
Alga-Like Fossils from the Early Precambrian of South Africa
Micropaleontological studies of carbonaceouis chert from the Fig Tree Series of South Africa (> 3.1 x 109 years old) revealed the presence of spheroidal microfossils, here designated… Expand
The History and Stability of Atmospheric Oxygen
There are three processes weakly concentration-dependent that keep changes in concentration of atmospheric pressure from being a random walk—inhibition of net photosynthesis by oxygen, the passage of… Expand
The Earth as a Planet
  • A. Cook
  • Engineering, Medicine
  • Nature
  • 1970
TLDR
Professor Cook deals with some of these problems in this article, which is a summary of the inaugural lecture he gave as professor of geophysics at Edinburgh on January 15. Expand
...
1
2
3
4
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