Effect of mantle oxidation state and escape upon the evolution of Earth's magma ocean atmosphere

Abstract

The magma ocean period was a critical phase determining how Earth atmosphere developed into habitability. However there are major uncertainties in the role of key processes such as outgassing from the planetary interior and escape of species to space that play a major role in determining the atmosphere of early Earth. We investigate the influence of outgassing of various species and escape of H${}_2$ for different mantle redox states upon the composition and evolution of the atmosphere for the magma ocean period. We include an important new atmosphere-interior coupling mechanism namely the redox evolution of the mantle which strongly affects the outgassing of species. We simulate the volatile outgassing and chemical speciation at the surface for various redox states of the mantle by employing a C-H-O based chemical speciation model combined with an interior outgassing model. We then apply a line-by-line radiative transfer model to study the remote appearance of the planet in terms of the infrared emission and transmission. Finally, we use a parameterized diffusion-limited and XUV energy-driven atmospheric escape model to calculate the loss of H${}_2$ to space. We have simulated the thermal emission and transmission spectra for reduced or oxidized atmospheres present during the magma ocean period of Earth. Reduced or thin atmospheres consisting of H${}_2$ in abundance emit more radiation to space and have larger effective height as compared to oxidized or thick atmospheres which are abundant in H${}_2$O and CO${}_2$. We obtain the outgassing rates of H2 from the mantle into the atmosphere to be a factor of ten times larger than the rates of diffusion-limited escape to space. Our work presents useful insight into the development of Earth atmosphere during the magma ocean period as well as input to guide future studies discussing exoplanetary interior compositions.

26 pages, 15 figures, accepted for publication

References in corpus (17)

• Atmospheric Retrieval for Super-Earths: Uniquely Constraining the Atmospheric Composition with Transmission Spectroscopy
• Warming early Mars with CO2 and H2
• The Extreme Ultraviolet and X-Ray Sun in Time: High-Energy Evolutionary Tracks of a Solar-Like Star
• Predictions of the atmospheric composition of GJ 1132b
• Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths
• Impact of Clouds and Hazes on the Simulated JWST Transmission Spectra of Habitable Zone Planets in the TRAPPIST-1 System
• The terrestrial late veneer from core disruption of a lunar-sized impactor
• What factors affect the duration and outgassing of the terrestrial magma ocean?
• Extreme hydrodynamic losses of Earth-like atmospheres in the habitable zones of very active stars
• TRAPPIST-1: Global Results of the Spitzer Exploration Science Program {\it Red Worlds}
• The Compositional Diversity of Low-Mass Exoplanets
• High resolution transmission spectrum of the Earth's atmosphere -- Seeing Earth as an exoplanet using a lunar eclipse
• Hydrogen isotopic evidence for early oxidation of silicate Earth
• Distinguishing between wet and dry atmospheres of TRAPPIST-1 e and f
• Convection in Condensible-rich Atmospheres
• Consistently Simulating a Wide Range of Atmospheric Scenarios for K2-18b with a Flexible Radiative Transfer Module
• Evolution and Spectral Response of a Steam Atmosphere for Early Earth with a coupled climate-interior model

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