ArticleScience advances2018
Disequilibrium biosignatures over Earth history and implications for detecting exoplanet life.
Article in Science advances, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
25 citing papers in PubMed.
- Proto-Biosignatures and Planetary Geochemical Metabolism: A Thermodynamic Screening Model of Prebiotic Geochemical Organization.Life (Basel, Switzerland) · 2026Article
- Slowing planetary rotation influences ocean nutrient cycling and oxygenation.Science advances · 2026Article
- Prospects for detecting signs of life on exoplanets in the JWST era.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Modelling exo-biospheres for biosignature predictions.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025Review
- Life on Venus?Life (Basel, Switzerland) · 2025Article
- An Informational-Entropic Approach to Exoplanet Characterization.Entropy (Basel, Switzerland) · 2025Article
- Hydrogenotrophic methanogenesis at 7-12 mbar by Methanosarcina barkeri under simulated martian atmospheric conditions.Scientific reports · 2025Article
- Olivine alteration and the loss of Mars' early atmospheric carbon.Science advances · 2024Article
- Co-evolution of early Earth environments and microbial life.Nature reviews. Microbiology · 2024Review
- Phosphate availability and implications for life on ocean worlds.Nature communications · 2023Article
- Linking Methanogenesis in Low-Temperature Hydrothermal Vent Systems to Planetary Spectra: Methane Biosignatures on an Archean-Earth-like Exoplanet.Astrobiology · 2023Article
- The case and context for atmospheric methane as an exoplanet biosignature.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Article
- Introduction-First Billion Years: Habitability.Astrobiology · 2021Review
- Cellular remains in a ~3.42-billion-year-old subseafloor hydrothermal environment.Science advances · 2021Article
- Carbonate-silicate cycle predictions of Earth-like planetary climates and testing the habitable zone concept.Nature communications · 2020Article
- An objective Bayesian analysis of life's early start and our late arrival.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Co-evolution of primitive methane-cycling ecosystems and early Earth's atmosphere and climate.Nature communications · 2020Article
- The Archean atmosphere.Science advances · 2020Review
- Evolution of novel activation functions in neural network training for astronomy data: habitability classification of exoplanets.The European physical journal. Special topics · 2020Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Chemical disequilibrium in planetary atmospheres has been proposed as a generalized method for detecting life on exoplanets through remote spectroscopy. Among solar system planets with substantial atmospheres, the modern Earth has the largest thermodynamic chemical disequilibrium due to the presence of life. However, how this disequilibrium changed over time and, in particular, the biogenic disequilibria maintained in the anoxic Archean or less oxic Proterozoic eons are unknown. We calculate the atmosphere-ocean disequilibrium in the Precambrian using conservative proxy- and model-based estimates of early atmospheric and oceanic compositions. We omit crustal solids because subsurface composition is not detectable on exoplanets, unlike above-surface volatiles. We find that (i) disequilibrium increased through time in step with the rise of oxygen; (ii) both the Proterozoic and Phanerozoic may have had remotely detectable biogenic disequilibria due to the coexistence of O
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.