Cited by 248Paleontology and Stratigraphy of FossilsGeology and Paleoclimatology ResearchGeological and Geochemical Analysis

Paleoclimates, ocean depth, and the oxygen isotopic composition of seawater

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Kasting, James F., Howard, M. Tazewell, Wallmann, Klaus, Veizer, Ján, Shields, Graham, Jaffrés, Jasmine·2006·Earth and Planetary Science Letters

Abstract

A recurrent interpretation of ancient climate based on the oxygen isotopic composition of marine carbonates and cherts suggests that Earth's climate was substantially warmer in the distant past and remained so until as recently as 400 Myr ago. This interpretation is difficult to reconcile with the long-term glacial record, with evidence for modest weathering rates during most of Earth's history, with biomarker and fossil evidence for eukaryotes and even vertebrates at times of anomalously low δ18O values, and with the predicted faintness of the young Sun. We argue here, following earlier suggestions, that the low δ18O values in ancient rocks are a consequence of the low δ18O of ancient seawater. A modest increase in ocean depth with time, together with progressive increases in pelagic sedimentation on midocean ridge flanks since about 550 Ma, could account for the variation in seawater isotopic composition. The required change in ocean depth, coupled with thinning of the oceanic crust, is a natural consequence of the decline in heat flow over time. Contrary to previous assertions, such a model is not inconsistent with data from ophiolites. It seems likely that Earth's climate remained largely within Phanerozoic norms throughout the past 3.5 Ga.

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Crossref · 10.1016/j.epsl.2006.09.029

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  • Archean surface temperatures were similar to today's because the oxygen isotope composition of seawater, δ18Oseawater, increased by ~15‰ since 3.5 Ga ago.

    “Two alternative interpretations are as follows: (i) Archean surface temperatures were similar to today’s because the oxygen isotope composition of seawater, δ18Oseawater, increased by ~15‰ since 3.5 Ga ago (229, 230).”

    From The Archean atmosphere (2020) · cites this paper as [229]

    The Abstract says ancient seawater had lower δ18O and that climate likely remained within Phanerozoic norms over the past 3.5 Ga. Section 7 estimates the seawater difference at perhaps as much as 10‰, not ~15‰; it also presents the climate conclusion as conditional on that interpretation. Page numbers are unavailable in our copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Archean oceans with shallow seafloor hydrothermal circulation and an increase in Phanerozoic pelagic sediments that lowers seafloor weathering might cause secular increase in δ18Oseawater.

    “Archean oceans with shallow seafloor hydrothermal circulation and an increase in Phanerozoic pelagic sediments that lowers seafloor weathering might cause secular increase in δ18Oseawater [e.g., (229)].”

    From The Archean atmosphere (2020) · cites this paper as [229]

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2 of the 71 references couldn’t be matched to a known paper.

Research works printed but not linked: 4

  1. D.L. Turcotte, G. Schubert, Geodynamics, 2nd ed., Cambridge Univ. Press, Cambridge, 2002.
  2. K. Burke, J.F. Dewey, W.S.F. Kidd, Dominance of horizontal movements, arc, and microcontinental collisions during the late permobile regime, in: B.F. Windley (Ed.), The Early History of the Earth, Wiley, New York, 1976.
  3. N.H. Sleep, Evolution of the Earth: Plate Tectonics Through Time (MS 143), in Treatise on Geophysics, vol. 9, G. Schubert, ed., Elsevier (in press).
  4. D.W. Beaty, The oxygen isotope geochemistry of the Abitibi Greenstone Belt, Caltech Ph.D. thesis (1980). Available at: http:// etd.caltech.edu/etd/available/etd-02232006-092342/.

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Authors
Kasting, J. F., Howard, M. T., Wallmann, K., Veizer, J., Shields, G., & Jaffrés, J.
Affiliations
  • Pennsylvania State University (US)
  • University of Ottawa (CA)
  • James Cook University (AU)
Corresponding author
Kasting, James F.
Venue
Earth and Planetary Science Letters
Publisher
Elsevier BV
Published
2006-11
Volume
252
Issue
1-2
Pages
82-93
ISSN
0012-821X (ISSN-L)
OpenAlex
W2145685810
Cited by
248
References
71
Citations by year
2026: 3 · 2025: 11 · 2024: 11 · 2023: 11 · 2022: 12 · 2021: 11 · 2020: 15 · 2019: 21 · 2018: 22 · 2017: 13 · 2016: 10 · 2015: 7 · 2014: 11 · 2013: 16 · 2012: 12
FWCI
12.02
Type
journal article
Language
en
Open access
Locations
  • Earth and Planetary Science Letters (publishedVersion, cc-by-nc-nd)
  • Helmholtz Centre for Ocean Research Kiel (GEOMAR) (acceptedVersion)
  • ResearchOnline at James Cook University (James Cook University) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
National Aeronautics and Space Administration
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
Keywords
paleoclimate, seawater oxygen isotopes, δ18O, ocean depth, marine carbonates, chert, Phanerozoic climate, ocean heat flux, ophiolite, eukaryotic evolution, paleoclimate models

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