Atmospheric evolution of Venus and exo-Venus analogs

Jan. 27, 2022, noon - 12:50 p.m.

Presented By:
Joshua Krissansen-Totton
Dept Astronomy & Astrophysics, UCSC &

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Interpreting upcoming observations of highly irradiated terrestrial exoplanets may be contingent on understanding Venus's atmospheric evolution. Here, I present a coupled atmosphere-interior evolution model for hot terrestrial planets to constrain Venus's past climate and investigate the fate of oxygen leftover from hydrogen escape. Initial results suggest both habitable and never-habitable histories can be broadly reconciled with geochemical constraints and that efficient oxygen sinks must be invoked to explain the current atmosphere.