Sulfur, ultraviolet radiation, and the early evolution of life

By J. Kasting, K. Zahnle, Joseph P. Pinto, A. T. Young. Origins of life and evolution of the biosphere, 2005

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Cyanobacterial Responses to UV Radiation (2012, background): “Alternative conditions that may have resulted in the attenuation of UVR in the primitive anoxic atmosphere may have been sulphur vapor composed of S 8 and other sulfur molecules (Kasting et al. 1989 ) .”
Evolution of a habitable planet (2003, methodology): “(From Kasting et al. 1989). with the model atmosphere shown in Figure 7, in which O2 virtually disappears below∼20 km altitude.”
PHOTOCHEMISTRY IN TERRESTRIAL EXOPLANET ATMOSPHERES. I. PHOTOCHEMISTRY MODEL AND BENCHMARK CASES (2012, background): “These aerosols and water vapor are the common condensable materials at habitable temperatures that commonly exist in planetary atmospheres (e.g., Kasting et al. 1989; Pavlov et al. 2000; Seinfeld & Pandis 2006).”
ATMOSPHERIC SULFUR PHOTOCHEMISTRY ON HOT JUPITERS (2009, methodology): “The code is based on the sulfur photochemistry model for early Earth originally described by Kasting et al (1989) and Kasting (1990), and subsequently adapted by Zahnle et al (2006) and Claire et al (2006) to address sulfur photochemistry of Earth’s atmosphere during the Archean, and by Zahnle et…”
The antiquity of microbial sulfate reduction (2004, background): “Volcanic emission on the early Earth should have been significantly more vigorous than today, injecting large amounts of SO2, among other gases, into the atmosphere (Kasting et al., 1989; Kasting, 2001).”