Cited by 65Paleontology and Stratigraphy of FossilsEarth Systems and Cosmic EvolutionOrigins and Evolution of Life

Effects of primitive photosynthesis on Earth’s early climate system

Open access
Ozaki, Kazumi, Tajika, Eiichi, Hong, Peng K., Nakagawa, Yusuke, Reinhard, Christopher T.·2018·Nature Geoscience

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Crossref · 10.1038/s41561-017-0031-2

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63 of 63 references verified0 citation errors · 0 not checkable

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  • Anoxic Archean air could hold 1000s of ppmv of CH4 if a microbial flux of CH4 was comparable to today's.

    “Anoxic Archean air could hold 1000 s of parts per million by volume of CH4 if a microbial flux of CH4 was comparable to today’s (135, 183, 184).”

    From The Archean atmosphere (2020) · cites this paper as [184]

    The Methods (p. 13) model methane from microbial methanogenesis entering an anoxic atmosphere, and Fig. 2 (p. 5) relates biogenic CH4 flux to atmospheric CH4 mixing ratio. The passages do not establish a concentration of thousands of ppmv for a microbial methane flux comparable to today’s; the modern flux compared on p. 4 is reduced-gas outgassing, not microbial methane emissions. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • In models with methanogens and H2-based photosynthesizers, atmospheric H2 mixing ratios generally are ≤10^-4.

    “In models with methanogens and H2-based photosynthesizers, atmospheric H2 mixing ratios depend on assumed H2 outgassing and biological productivity but generally are ≤10−4 (183, 184).”

    From The Archean atmosphere (2020) · cites this paper as [184]

    The Methods (p. 13) describe a model with H2-using photosynthesis and methanogenesis, while the results (p. 4) show that outgassing affects photosynthetic production. The Methods (p. 15) refer to an atmospheric H2 mixing-ratio calculation, but the equation is not decoded in our copy; no passage establishes that the ratio is generally ≤10⁻⁴. (LLM, conf=0.79)

    Experimental — accuracy not yet measured

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Authors
Ozaki, K., Tajika, E., Hong, P. K., Nakagawa, Y., & Reinhard, C. T.
Affiliations
  • Georgia Institute of Technology (US)
  • The University of Tokyo (JP)
  • Hitachi Power Solutions Co., Ltd. (Japan) (JP)
Corresponding author
Ozaki, Kazumi
Venue
Nature Geoscience
Published
2017-12-11
Volume
11
Issue
1
Pages
55-59
ISSN
  • 1752-0894 (ISSN-L)
  • 1752-0908
OpenAlex
W2771303756
Cited by
65
References
65
Citations by year
2026: 1 · 2025: 4 · 2024: 9 · 2023: 10 · 2022: 9 · 2021: 8 · 2020: 12 · 2019: 9 · 2018: 1 · 2017: 1
FWCI
4.49
Type
journal article
Language
en
Open access
Locations
  • Nature Geoscience (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
Japan Society for the Promotion of Science (16K05618)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Earth Systems and Cosmic Evolution
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
Keywords
early Earth climate, anoxygenic photosynthesis, faint young Sun paradox, reducing atmosphere, biogeochemical feedbacks

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