Disequilibrium biosignatures over Earth history and implications for detecting exoplanet life

@inproceedings{KrissansenTotton2018DisequilibriumBO,
  title={Disequilibrium biosignatures over Earth history and implications for detecting exoplanet life},
  author={Joshua Krissansen-Totton and Stephanie Lynn Olson and David C. Catling},
  booktitle={Science Advances},
  year={2018}
}
Chemical disequilibrium in planetary atmospheres has been proposed as a generalized method for detecting life on exoplanets through remote spectroscopy. Among solar system planets with substantial atmospheres, the modern Earth has the largest thermodynamic chemical disequilibrium due to the presence of life. However, how this disequilibrium changed over time and, in particular, the biogenic disequilibria maintained in the anoxic Archean or less oxic Proterozoic eons are unknown. We calculate… CONTINUE READING
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