UV shielding of NH3 and O2 by organic hazes in the Archean atmosphere

@article{Pavlov2001UVSO,
  title={UV shielding of NH3 and O2 by organic hazes in the Archean atmosphere},
  author={A. Pavlov and L. L. Brown and J. Kasting},
  journal={Journal of Geophysical Research},
  year={2001},
  volume={106},
  pages={23267-23287}
}
The late Archean atmosphere was probably rich in biologically generated CH4 and may well have contained a hydrocarbon haze layer similar to that observed today on Saturn's moon, Titan. Here we present a detailed model of the photochemistry of haze formation in the early atmosphere, and we examine the effects of such a haze layer on climate and ultraviolet radiation. We show that the thickness of the haze layer was limited by a negative feedback loop: A haze optical depth of more than ∼0.5 in… Expand
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