Coupling of surface temperatures and atmospheric CO2 concentrations during the Palaeozoic era

  title={Coupling of surface temperatures and atmospheric CO2 concentrations during the Palaeozoic era},
  author={Rosemarie E. Came and John Eiler and J{\'a}n Veizer and Karem. Azmy and Uwe Brand and Christopher R. Weidman},
Atmospheric carbon dioxide concentrations seem to have been several times modern levels during much of the Palaeozoic era (543–248 million years ago), but decreased during the Carboniferous period to concentrations similar to that of today. Given that carbon dioxide is a greenhouse gas, it has been proposed that surface temperatures were significantly higher during the earlier portions of the Palaeozoic era. A reconstruction of tropical sea surface temperatures based on the δ18O of carbonate… Expand
Temperature evolution and the oxygen isotope composition of Phanerozoic oceans from carbonate clumped isotope thermometry
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Isotopic evidence for long term warmth in the Mesozoic
The results are consistent with a warm climate mode for the Jurassic and Cretaceous and hence support the view that changes in atmospheric CO2 concentrations are linked with changes in global temperatures. Expand
Temperatures and oxygen isotopic composition of Phanerozoic oceans
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An early Cambrian greenhouse climate
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Triple Oxygen Isotopes of Cherts : Implications for the δ18O and Temperatures of Early Oceans
The temperature of Earth’s earliest oceans, in which life may have first originated, remains a controversial issue in Earth science. Over the last 50 years, many studies have attempted to apply theExpand
The Case for a Hot Archean Climate and its Implications to the History of the Biosphere
The case for a much warmer climate on the early Earth than now is presented. The oxygen isotope record in sedimentary chert and the compelling case for a near constant isotopic oxygen composition ofExpand
Oxygen isotope composition of the Phanerozoic ocean and a possible solution to the dolomite problem
  • Uri Ryb, J. Eiler
  • Medicine, Geology
  • Proceedings of the National Academy of Sciences
  • 2018
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Seawater Temperature and Dissolved Oxygen over the Past 500 Million Years
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Evidence for decoupling of atmospheric CO2 and global climate during the Phanerozoic eon
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Ancient atmospheric C02 pressures inferred from natural goethites
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Paleoclimates, ocean depth, and the oxygen isotopic composition of seawater
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The oxygen isotopic composition of the oceans, sediments and the seafloor
The oxygen isotope history of seawater remains controversial despite decades of study. Isotopic data from fossils and chemical sediments generally indicate significantly 18O-depleted seas during theExpand
Modelling the Phanerozoic carbon cycle and climate: constraints from the 87Sr/86Sr isotopic ratio of seawater.
A history of atmospheric carbon dioxide and climate during Phanerozoic time, consistent with the strontium isotopic data, is reconstructed and is shown to be compatible with paleoclimatic indicators, such as the timing of glaciation and the estimates of Cretaceous paleotemperatures. Expand
CO2-Forced Climate and Vegetation Instability During Late Paleozoic Deglaciation
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Geocarb III: A Revised Model of Atmospheric CO2 over Phanerozoic Time
Revision of the GEOCARB model (Berner, 1991, 1994) for paleolevels of atmospheric CO2, has been made with emphasis on factors affecting CO2 uptake by continental weathering. This includes: (1) newExpand
Climate sensitivity constrained by CO2 concentrations over the past 420 million years
Long-term equilibrium climate sensitivity is estimated by modelling carbon dioxide concentrations over the past 420 million years and comparing the calculations with a proxy record to indicate that a weak radiative forcing by carbon dioxide is highly unlikely on multi-million-year timescales. Expand
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The high-latitude extent of warm-climate indicators at certain times in Earth history has been considered as evidence that the globe was ice-free for long intervals, despite theoreticalExpand
The oxygen and carbon isotope composition of Carboniferous fossil components: sea‐water effects
The aragonitic molluscs and lime-mud of the Pennsylvanian Buckhorn asphalt (Deese Group) of southern Oklahoma precipitated calcium carbonate in oxygen and carbon isotopic equilibrium with ambientExpand