Abstract
The present biosphere is shielded from harmful solar near ultraviolet (UV) radiation by atmospheric ozone. We suggest here that elemental sulfur vapor could have played a similar role in an anoxic, ozone-free, primitive atmosphere. Sulfur vapor would have been produced photochemically from volcanogenic SO2 and H2S. It is composed of ring molecules, primarily S8, that absorb strongly throughout the near UV, yet are expected to be relatively stable against photolysis and chemical attack. It is also insoluble in water and would thus have been immune to rainout or surface deposition over the oceans. The concentration of S8 in the primitive atmosphere would have been limited by its saturation vapor pressure, which is a strong function of temperature. Hence, it would have depended on the magnitude of the atmospheric greenhouse effect. Surface temperatures of 45 °C or higher, corresponding to carbon dioxide partial pressures exceeding 2 bars, are required to sustain an effective UV screen. Two additional requirements are that the ocean was saturated with sulfite and bisulfite, and that linear S8 chains must tend to reform rings faster than they are destroyed by photolysis. A warm, sulfur-rich, primitive atmosphere is consistent with inferences drawn from molecular phylogeny, which suggest that some of the earliest organisms were thermophilic bacteria that metabolized elemental sulfur.
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References
Bass, A. M.: 1953,J. Chem. Phys. 21, 80.
Baulch, D. L., Drysdale, D. D., Duxbury, J., and Grant, S.: 1984,Evaluated Kinetic Data for High Temperature Reactions. III. Homogeneous Gas Phase Reactions of the O 2–O3 System, the CO-O 2-H 2 System, and of Sulfur-Containing Species, Butterworth's, London.
Berkner, L. V. and Marshall, L. C.: 1965,J. Atmos Sci. 22, 225.
Berresheim, H. and Jaeschke, W.: 1983,J. Geophys. Res. 88, 3732.
Cadle, R. P.: 1980,Rev. Geophys. Space Phys. 18, 746.
deAlmeida, A. A., and Singh, P. D.: 1986,Earth, Moon, and Planets 36, 117.
DeMore, W. B. et al: 1985,Chemical Kinetics and Photochemical Data for Use in Stratospheric Modeling, Eval. No. 7, JPL Publication 85-37.
Elbanowski, M.: 1970,Roczniki Chemii Ann. Soc. Chim. Polonorum 44, 801.
Giorgi, F. and Chameides, W. L.: 1985,J. Geophys. Res. 90, 7872.
Grinspoon, D. and Sagan, C.: 1987,Bull. Amer. Astron. Soc. 19(3, 872.
Gunning, H. E. and Strausz, O. P.: 1966,Advan. Photochem. 4, 143.
Holland, H. D.: 1978,The Chemistry of the Atmosphere and Oceans, Wiley-Interscience, New York.
Holland, H. D.: 1984,The Chemical Evolution of the Atmosphere and Oceans, Princeton University Press, Princeton, New Jersey.
Karchmer, J. H., (ed.): 1970,The Analytical Chemistry of Sulfur and its Compounds, Wiley-Interscience New York.
Kasting, J. F.: 1987,Precambrian Res. 34, 205.
Kasting, J. F., Pollack, J. B., and Crisp, D.: 1984,J. Atmos. Chem. 1, 403.
Kasting, J. F. and Ackerman, T. P.: 1986,Science 234, 1383.
Kasting, J. F., Zahnle, K. J., and Pinto, J. P.: 1989,J. Geophys. Res. (submitted).
Khare, B. N. and Sagan, C.: 1975,Science 189, 722.
Lake, J. A.: 1988,Nature 331, 184.
Lewis, J. S. and Prinn, R. G.: 1984,Planets and Their Atmospheres: Origin and Evolution, Academic Press, Sao Paulo.
Maher, K. A. and Stevenson, D. J.: 1988,Nature 331, 612.
Margulis, L., Walker, J. C. G. and Rambler, M.: 1976,Nature 264, 620.
NBS: 1965,National Bureau of Standards Tech. Note 270-1, Washington, D. C.
Nishijima, C., Kanamaru, N., and Kimura, K.: 1976,Bull. Chem. Soc. Jpn. 49, 1151.
Owen, T., Cess, R. D. and Ramanathan, V.: 1979,Nature 277, 640.
Pace, N. R., Olsen, G. J., and Woese, C. R.: 1986,Cell 45, 325.
Pinto, J. P., Gladstone, C. R., and Yung, Y. L.: 1980,Science 210, 183.
Prinn, R. G.: 1979,Geophys. Res. Lett. 6, 807.
Rambler, M. and Margulis, L.: 1980,Science 210, 638.
Ratner, M. J. and Walker, J. C. G.: 1972,J. Atmos. Sci. 29, 803.
Sagan, C.: 1957,Evolution 11, 40.
Sagan, C.: 1961,Radiation Res. 15, 174.
Sagan, C.: 1973,J. Theor. Biol. 39, 195.
Sander, U. H. F., Fischer, H., Rothe, U., and Kola, R.: 1984,Sulphur, Sulphur Dioxide, and Sulphuric Acid, The British Sulfur Corp., London.
Slinn, W. G. N., Hasse, L., Hicks, B. B., Hogan, A. W., Lal, D., Liss, P. S., Munnich, K. O., Sehmel, G. A., and Vittori, O.: 1978,Atmos. Environ. 12, 2055.
Towe, K. M.: 1981,Precambrian Res. 16, 1.
Towe, K. M.: 1983,Precambrian Res. 20, 161.
Van de Hulst, H. C.: 1957, in G. P. Kuiper (ed.),Atmospheres of the Earth and Planets, Univ. of Chicago Press, Chicago, p. 49.
Walker, J. C. G.: 1977,Evolution of the Atmosphere, MacMillan, New York.
Walker, J. C. G.: 1983,Nature 302, 518.
Walker, J. C. G.: 1985,Origins of Life 16, 117.
Walker, J. C. G., Hays, P. B., and Kasting, J. F.: 1981,J. Geophys. Res. 86, 9776.
Walker, J. C. G. and Brimblecombe, P.: 1985,Precambrian Res. 28, 205.
Woese, C. R.: 1987,Microbiol. Rev. 51, 221 (1987).
Woese, C. R. and Olsen, G. J.: 1986,Syst. Appl. Microbiol. 7, 161.
Wolery, T. J. and Sleep, N. H.: 1976,J. Geol. 84, 249.
Young, A. T.: 1985,Bull. AAS 17, 720.
Yung, Y. L.: 1976,J. Quant. Spectrosc. Radiat. Transf. 16, 755.
Yung, Y. L. and McElroy, M. C.: 1979,Science 203, 1002.
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Kasting, J.F., Zahnle, K.J., Pinto, J.P. et al. Sulfur, ultraviolet radiation, and the early evolution of life. Origins Life Evol Biosphere 19, 95–108 (1989). https://doi.org/10.1007/BF01808144
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DOI: https://doi.org/10.1007/BF01808144