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Photochemistry of methane and the formation of hydrocyanic acid (HCN) in the Earth's early atmosphere

Zahnle, Kevin J.·1986·Journal of Geophysical Research: Atmospheres

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Abstract

The photochemistries of methane and HCN are discussed in the context of the primitive terrestrial atmosphere, using a detailed numerical model. In the absence of abundant O 2, absorption of solar EUV (λ < 1023Å) by N 2 provides a large thermospheric source of atomic nitrogen. Methane is oxidized cleanly and efficiently, provided CO 2 is more abundant than CH 4. Otherwise, a large fraction of the methane present is polymerized, forming alkanes in the troposphere and polyacetylenes and nitriles in the upper atmosphere. The combination of low O 2, high N 2, and moderately high levels of CO 2 would have made the ancient terrestrial atmosphere a favorable environment for the production of HCN from CH 4. Once formed, HCN is rather long‐lived; it is removed from the atmosphere either by direct photodissociation at Ly α (∼100 years) or by rainfall (∼10 years). Chemical loss would have been unimportant. Owing to its stability, transport of HCN from the top to the bottom of the atmosphere can be efficient; nevertheless, our results are sensitive to the assumed eddy diffusion profile. For small amounts of methane a small constant fraction of order 0.1% to 1% of the carbon in the methane is returned to the surface as hydrocyanic acid rain. For larger methane sources exceeding a critical value of order 10 11 molecules cm−2 s−1 (corresponding to ƒ(CH 4) of order 10−4–10−3), rainout of HCN increases abruptly to more than 10% of the carbon supplied as methane, limited by the primary production of N. Under favorable conditions, hydrolysis of HCN could have supported atmospheric NH 3 mixing ratios approaching 1 ppm.

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The Chemical Evolution of the Atmosphere and Oceans
Holland, H. D. (1984) · doi:10.1515/9780691220239 · Cited by 1,836
Chemical kinetics and photochemical data for use in stratospheric modeling
DeMore, W. B., Margitan, J. J., Molina, M. J., Watson, R. T., Golden, D. M., Hampson, R. F., Kurylo, M. J., HOWARD, C. J., & Ravishankara, A. R. (1992) · NASA STI Repository (National Aeronautics and Space Administration) · Cited by 1,535
Photochemistry of the atmosphere of Titan - Comparison between model and observations
Yung, Y. L., Allen, M., & Pinto, J. P. (1984) · The Astrophysical Journal Supplement Series · doi:10.1086/190963 · Cited by 1,081
Earth and Mars: evolution of atmospheres and surface temperatures
Sagan, C., & Mullen, G. (1972) · Science · doi:10.1126/science.177.4043.52 · Cited by 942
Evaluated kinetic data for high temperature reactions
Baulch, D. L., Drysdale, D. D., Horne, D. G., & Lloyd, A. C. (1972) · Butterworths eBooks · Cited by 881
The evolving continents
Windley, B. F. (1977) · Andalas University Repository (Andalas University) · Cited by 841
Photochemistry of small molecules
Wayne, R. P. (1979) · Nature · doi:10.1038/280521a0 · Cited by 710
Theory of thermal unimolecular reactions at low pressures. II. Strong collision rate constants. Applications
Troe, J. (1977) · The Journal of Chemical Physics · doi:10.1063/1.433838 · Cited by 665
A model for gas phase chemistry in interstellar clouds. I - The basic model, library of chemical reactions, and chemistry among C, N, and O compounds
Prasad, S. S., & T., J. H. W. (1980) · The Astrophysical Journal Supplement Series · doi:10.1086/190665 · Cited by 427
Recent advances in the chemistry of electronically excited atoms
Donovan, R. J., & Husain, D. (1970) · Chemical Reviews · doi:10.1021/cr60266a003 · Cited by 402

Show all 123 references

Research works printed but not linked: 6

Barassin J., 1974, Etude cinètique des réaction entre l'oxygèn et les dérivés chlores du methane, Bull. Soc. Chim. France, 1
Chang S., 1983, Origin and Evolution of Earth's Earliest Biosphere
Huebner W. F., 1980, A model of comet comae, Astrophys. J., 238, 763
Oró J., 1981, Cyanide in Biology
Shu F., 1982, The Physical Universe
Walker J. C. G., 1977, Evolution of the Atmosphere

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Natural evidence for rapid abiogenic hydrothermal generation of CH4
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Self-citation
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The Emergence of Life
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“Photochemical production of HCN from even small fluxes of methane is efficient and likely was significant on the early Earth (Zahnle 1986; Tian et al. 2011), and most recent models suggest percent-levels of hydrogen would be present in the atmosphere before life arose (Tian et al. 2005; Wordsworth…”
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Self-citation
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Atmospheric Prebiotic Chemistry and Organic Hazes
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Volcanic emissions and the early Earth atmosphere
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Abiotic O 2 Levels on Planets around F, G, K, and M Stars: Effects of Lightning-produced Catalysts in Eliminating Oxygen False Positives
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Authors: Zahnle, K. J.
Corresponding author: Zahnle, Kevin J.
ORCID: Zahnle, Kevin J.
Venue: Journal of Geophysical Research: Atmospheres
Publisher: American Geophysical Union (AGU)
Published: 1986-02-20
Volume: 91
Issue: D2
Pages: 2819-2834
ISSN: 0148-0227 (ISSN-L)
DOI: 10.1029/jd091id02p02819
OpenAlex: W1965198394
Cited by: 276
References: 123
Citations by year: 2026: 10 · 2025: 18 · 2024: 13 · 2023: 7 · 2022: 18 · 2021: 10 · 2020: 16 · 2019: 20 · 2018: 17 · 2017: 7 · 2016: 11 · 2015: 11 · 2014: 6 · 2013: 8 · 2012: 4
FWCI: 4.19
Type: journal article
Language: en
Open access: closed
Licence: onlinelibrary.wiley.com/termsAndConditions#vor (vor, 9710 d)
Locations: Journal of Geophysical Research Atmospheres (publishedVersion)
Topics: Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
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: methane photochemistry, hydrogen cyanide, early Earth atmosphere, atomic nitrogen, methane oxidation, polyacetylene, nitriles, atmospheric transport, turbulent diffusion, ammonia, carbon cycle, CO2 abundance

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Photochemistry of methane and the formation of hydrocyanic acid (HCN) in the Earth's early atmosphere

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