National Aeronautics and Space Administration

Publication Abstracts

Canuto et al. 1982

Canuto, V.M., J.S. Levine, T.R. Augustsson, and C.L. Imhoff, 1982: UV radiation from the young Sun and oxygen and ozone levels in the prebiological palaeoatmosphere. Nature, 296, 816-820, doi:10.1038/296816a0.

UV measurements of young T-Tauri stars, resembling the Sun at an age of a few million years, have recently been made with the International Ultraviolet Explorer. They indicate that young stars emit up to 10⁴ times more UV than the present Sun. The implications for the origin and evolution of O₂ and O₃ in the prebiological palaeoatmosphere are presented here. The results of photochemical calculations indicate that the O₂ surface mixing ratio was a factor 10⁴-10⁶ times greater than the standard value of 10^-15. This new value reconciles the simultaneous existence of oxidized iron and reduced uranium.

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@article{ca05000n,
  author={Canuto, V. M. and Levine, J. S. and Augustsson, T. R. and Imhoff, C. L.},
  title={UV radiation from the young Sun and oxygen and ozone levels in the prebiological palaeoatmosphere},
  year={1982},
  journal={Nature},
  volume={296},
  pages={816--820},
  doi={10.1038/296816a0},
}

TY  - JOUR
ID  - ca05000n
AU  - Canuto, V. M.
AU  - Levine, J. S.
AU  - Augustsson, T. R.
AU  - Imhoff, C. L.
PY  - 1982
TI  - UV radiation from the young Sun and oxygen and ozone levels in the prebiological palaeoatmosphere
JA  - Nature
JO  - Nature
VL  - 296
SP  - 816
EP  - 820
DO  - 10.1038/296816a0
ER  -

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