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Showing 1–14 of 14 results
Advanced filters: Author: Richard E. Zeebe Clear advanced filters

  • The concentration of chemicals that absorb low-frequency sound in the ocean has declined as a result of anthropogenic increases in ocean acidity. Model simulations predict large reductions in sound absorption in the high latitudes and areas of deep-water formation over the twenty-first century.

    • Tatiana Ilyina
    • Richard E. Zeebe
    • Peter G. Brewer
    Research
    Nature Geoscience
    Volume: 3, P: 18-22

  • Carbon release rates during the Palaeocene–Eocene Thermal Maximum are difficult to constrain. Comparing relative rates of carbon cycle and climate change at the event’s onset suggests emissions were much slower than anthropogenic emissions.

    • Richard E. Zeebe
    • Andy Ridgwell
    • James C. Zachos
    Research
    Nature Geoscience
    Volume: 9, P: 325-329

  • About 55 million years ago global surface temperatures increased by 5–9 ∘C within a few thousand years, following a pulse of carbon released to the atmosphere. Analysis of existing data with a carbon cycle model indicates that this carbon pulse was too small to cause the full amount of warming at accepted values for climate sensitivity.

    • Richard E. Zeebe
    • James C. Zachos
    • Gerald R. Dickens
    Research
    Nature Geoscience
    Volume: 2, P: 576-580

  • On geological timescales, carbon dioxide enters the atmosphere through volcanism and organic matter oxidation and is removed through mineral weathering and carbonate burial. An analysis of ice-core CO2 records and marine carbonate chemistry indicates a tight coupling between these processes during the past 610,000 years, which suggests that a weathering feedback driven by atmospheric CO2 leads to a mass balance between CO2 sources and sinks on long timescales.

    • Richard E. Zeebe
    • Ken Caldeira
    Research
    Nature Geoscience
    Volume: 1, P: 312-315

  • Low atmospheric carbon dioxide concentrations during glacial periods must have been accompanied by changes in surface-ocean carbonate chemistry. But it is unclear whether concurrent changes in the deep sea contributed to the glacial carbon dioxide decline.

    • Richard E. Zeebe
    • Thomas M. Marchitto Jr
    News & Views
    Nature Geoscience
    Volume: 3, P: 386-387

    • Richard E. Zeebe
    Research Highlights
    Nature
    Volume: 466, P: 1025

  • Accurate prediction of Earth's future warming hinges on our understanding of climate sensitivity. Palaeoclimatology will help solve the problem if the feedbacks included in palaeoclimate sensitivity are properly identified and reconstructions of past atmospheric CO2 can be improved.

    • Richard E. Zeebe
    Comments & Opinion
    Nature Geoscience
    Volume: 4, P: 416-417

  • A detailed reconstruction of the calcium carbonate compensation depth—at which calcium carbonate is dissolved—in the equatorial Pacific Ocean over the past 53 million years shows that it tracks ocean cooling, increasing as the ocean cools.

    • Heiko Pälike
    • Mitchell W. Lyle
    • Richard E. Zeebe
    Research
    Nature
    Volume: 488, P: 609-614

  • A 500,000-year-long period of warmth in the middle Eocene was marked by high atmospheric carbon dioxide concentrations and prolonged dissolution of carbonate in the deep oceans. Numerical simulations attempting to capture these features identify gaps in our understanding of the causes of this and similar perturbations.

    • Appy Sluijs
    • Richard E. Zeebe
    • Steven M. Bohaty
    Reviews
    Nature Geoscience
    Volume: 6, P: 429-434