Coupling atmospheric retrievals to a Gibbs free energy model shows modern Earth-like chemical disequilibrium is hard to constrain: reflected light is limited by methane, and M dwarf transit constraints need 1 to 2 ppm noise.
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Modern Earth-like Chemical Disequilibrium Biosignatures Are Challenging To Constrain Through Spectroscopic Retrievals
Coupling atmospheric retrievals to a Gibbs free energy model shows modern Earth-like chemical disequilibrium is hard to constrain: reflected light is limited by methane, and M dwarf transit constraints need 1 to 2 ppm noise.