ArticleProceedings of the National Academy of Sciences of the United States of America2018
Constraining the climate and ocean pH of the early Earth with a geological carbon cycle model.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers.
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74 citing papers in PubMed, 343 citations in OpenAlex.
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- Autocatalytic Reaction between HCN and Cysteamine Produces Hydrophobic, Catalytic, Liquid Compartments.Journal of the American Chemical Society · 2025Article
- Simulated early Earth geochemistry fuels a hydrogen-dependent primordial metabolism.Nature ecology & evolution · 2025Article
- Nrf1 acts as a highly-conserved determinon for maintaining robust redox homeostasis in the eco-evo-devo process of life histories.Cell stress · 2025Review
- Metabolic Potential and Microbial Diversity of Late Archean to Early Proterozoic Ocean Analog Hot Springs of Japan.Microbes and environments · 2025Article
- Silicon isotopic signatures of granitoids support increased weathering of subaerial land 3.7 billion years ago.Communications earth & environment · 2025Article
- Chemical Antiquity in Metabolism.Accounts of chemical research · 2024Article
- Three-stage formation of cap carbonates after Marinoan snowball glaciation consistent with depositional timescales and geochemistry.Nature communications · 2024Article
- A Prebiotic Precursor to Life's Phosphate Transfer System with an ATP Analog and Histidyl Peptide Organocatalysts.Journal of the American Chemical Society · 2024Article
- Was hydrogen peroxide present before the arrival of oxygenic photosynthesis? The important role of iron(II) in the Archean ocean.Redox biology · 2024Review
14 more citing papers are in PubMed but not listed here.
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The early Earth's environment is controversial. Climatic estimates range from hot to glacial, and inferred marine pH spans strongly alkaline to acidic. Better understanding of early climate and ocean chemistry would improve our knowledge of the origin of life and its coevolution with the environment. Here, we use a geological carbon cycle model with ocean chemistry to calculate self-consistent histories of climate and ocean pH. Our carbon cycle model includes an empirically justified temperature and pH dependence of seafloor weathering, allowing the relative importance of continental and seafloor weathering to be evaluated. We find that the Archean climate was likely temperate (0-50 °C) due to the combined negative feedbacks of continental and seafloor weathering. Ocean pH evolves monotonically from [Formula: see text] (2σ) at 4.0 Ga to [Formula: see text] (2σ) at the Archean-Proterozoic boundary, and to [Formula: see text] (2σ) at the Proterozoic-Phanerozoic boundary. This evolution is driven by the secular decline of pCO
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