Cited by 390Origins and Evolution of LifePaleontology and Stratigraphy of FossilsAstro and Planetary Science

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A Hydrogen-Rich Early Earth Atmosphere

Tian, Feng, Toon, Owen B., Pavlov, Alexander A., De Sterck, H.·2005·Science

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Abstract

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.

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Authors: Tian, F., Toon, O. B., Pavlov, A. A., & De Sterck, H.
Affiliations: University of Waterloo (CA)
Astrophysical and Planetary Science Department, University of Colorado, Boulder, CO 80309, USA.
Corresponding author: Tian, Feng
ORCID: Tian, Feng
Toon, Owen B.
Pavlov, Alexander A.
Venue: Science
Publisher: American Association for the Advancement of Science (AAAS)
Published: 2005-05-13
Volume: 308
Issue: 5724
Pages: 1014-1017
ISSN: 0036-8075 (ISSN-L)
1095-9203
DOI: 10.1126/science.1106983
OpenAlex: W2027831967
Cited by: 390
References: 28
Citations by year: 2026: 10 · 2025: 10 · 2024: 8 · 2023: 9 · 2022: 7 · 2021: 11 · 2020: 18 · 2019: 12 · 2018: 18 · 2017: 13 · 2016: 13 · 2015: 14 · 2014: 19 · 2013: 32 · 2012: 19
FWCI: 23.66
Type: journal article
Language: en
Open access: closed
Locations: Science (publishedVersion)
PubMed (publishedVersion)
Topics: Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Astro and Planetary Science
Keywords: early Earth atmosphere, hydrogen escape, volcanic outgassing, origin of life, hydrothermal systems, atmospheric escape rates
MeSH terms: Origin of Life, Amino Acids, Atmosphere, Carbon Dioxide, Diffusion, Electricity, Hydrogen, Models, Theoretical, Oceans and Seas, Organic Chemicals, Photochemistry, Seawater, Temperature, Ultraviolet Rays, Earth, Planet, Evolution, Chemical, Evolution, Planetary

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A Hydrogen-Rich Early Earth Atmosphere

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