A hydrogen-rich early Earth atmosphere

TitleA hydrogen-rich early Earth atmosphere
Publication TypeJournal Article
Year of Publication2005
AuthorsTian, F, Toon, OB, Pavlov, AA, De Sterck, H
Date PublishedMay 13
ISSN0036-8075 (Linking)
Accession Number15817816

We show that the escape of hydrogen from early Earth's atmosphere likely occurred at rates slower by two orders of magnitude than previously thought. The balance between slow hydrogen escape and volcanic outgassing could have maintained a hydrogen mixing ratio of more than 30%. The production of prebiotic organic compounds in such an atmosphere would have been more efficient than either exogenous delivery or synthesis in hydrothermal systems. The organic soup in the oceans and ponds on early Earth would have been a more favorable place for the origin of life than previously thought.