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Atmospheric CO2 over the past 66 million years from marine archives

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Atmospheric CO2 over the past 66 million years from marine archives. / Rae, James W.B.; Zhang, Yi Ge; Liu, Xiaoqing; Foster, Gavin L.; Stoll, Heather M.; Whiteford, Ross D.M.

In: Annual Review of Earth and Planetary Sciences, Vol. 49, 05.2021, p. 609-641.

Research output: Contribution to journalArticlepeer-review

Harvard

Rae, JWB, Zhang, YG, Liu, X, Foster, GL, Stoll, HM & Whiteford, RDM 2021, 'Atmospheric CO2 over the past 66 million years from marine archives', Annual Review of Earth and Planetary Sciences, vol. 49, pp. 609-641. https://doi.org/10.1146/annurev-earth-082420-063026

APA

Rae, J. W. B., Zhang, Y. G., Liu, X., Foster, G. L., Stoll, H. M., & Whiteford, R. D. M. (2021). Atmospheric CO2 over the past 66 million years from marine archives. Annual Review of Earth and Planetary Sciences, 49, 609-641. https://doi.org/10.1146/annurev-earth-082420-063026

Vancouver

Rae JWB, Zhang YG, Liu X, Foster GL, Stoll HM, Whiteford RDM. Atmospheric CO2 over the past 66 million years from marine archives. Annual Review of Earth and Planetary Sciences. 2021 May;49:609-641. https://doi.org/10.1146/annurev-earth-082420-063026

Author

Rae, James W.B. ; Zhang, Yi Ge ; Liu, Xiaoqing ; Foster, Gavin L. ; Stoll, Heather M. ; Whiteford, Ross D.M. / Atmospheric CO2 over the past 66 million years from marine archives. In: Annual Review of Earth and Planetary Sciences. 2021 ; Vol. 49. pp. 609-641.

Bibtex - Download

@article{93eb255c790c439583e1a609a87006b6,
title = "Atmospheric CO2 over the past 66 million years from marine archives",
abstract = "Throughout Earth's history, CO2 is thought to have exerted a fundamental control on environmental change. Here we review and revise CO2 reconstructions from boron isotopes in carbonates and carbon isotopes in organic matter over the major climate transition of the past 66 million years. We find close coupling between CO2 and climate throughout the Cenozoic, with peak CO2 levels of ∼1,500 ppm in the Eocene greenhouse, decreasing to ∼550 ppm in the Miocene, and falling further into ice age world of the Plio–Pleistocene. Around two-thirds of Cenozoic CO2 drawdown is explained by an increase in the ratio of alkalinity to dissolved inorganic carbon, likely linked to a change in the balance of weathering to outgassing, with the remaining one-third due to changing ocean temperature and major ion composition. Earth system climate sensitivity is explored and may vary between different time intervals. The Cenozoic CO2 record highlights the truly geological scale of anthropogenic CO2 change: Current CO2 levels were last seen around 3 million years ago, and major cuts in emissions are required to prevent a return to the CO2 levels of the Miocene or Eocene in the coming century. ▪ CO2 reconstructions over the past 66 Myr from boron isotopes and alkenones are reviewed and re-evaluated. ▪ CO2 estimates from the different proxies show close agreement, yielding a consistent picture of the evolution of the ocean-atmosphere CO2 system over the Cenozoic. ▪ CO2 and climate are coupled throughout the past 66 Myr, providing broad constraints on Earth system climate sensitivity. ▪ Twenty-first-century carbon emissions have the potential to return CO2 to levels not seen since the much warmer climates of Earth's distant past. ",
keywords = "CO2, Boron isotopes, Alkenones, Climate, Cenozoic",
author = "Rae, {James W.B.} and Zhang, {Yi Ge} and Xiaoqing Liu and Foster, {Gavin L.} and Stoll, {Heather M.} and Whiteford, {Ross D.M.}",
note = "J.W.B.R. received funding for this work from the European Research Council under the European Union{\textquoteright}s Horizon 2020 research and innovation program (grant agreement 805246). Y.G.Z. received funding from the National Science Foundation (EAR-1806015).",
year = "2021",
month = may,
doi = "10.1146/annurev-earth-082420-063026",
language = "English",
volume = "49",
pages = "609--641",
journal = "Annual Review of Earth and Planetary Sciences",
issn = "0084-6597",
publisher = "Annual Reviews Inc.",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Atmospheric CO2 over the past 66 million years from marine archives

AU - Rae, James W.B.

AU - Zhang, Yi Ge

AU - Liu, Xiaoqing

AU - Foster, Gavin L.

AU - Stoll, Heather M.

AU - Whiteford, Ross D.M.

N1 - J.W.B.R. received funding for this work from the European Research Council under the European Union’s Horizon 2020 research and innovation program (grant agreement 805246). Y.G.Z. received funding from the National Science Foundation (EAR-1806015).

PY - 2021/5

Y1 - 2021/5

N2 - Throughout Earth's history, CO2 is thought to have exerted a fundamental control on environmental change. Here we review and revise CO2 reconstructions from boron isotopes in carbonates and carbon isotopes in organic matter over the major climate transition of the past 66 million years. We find close coupling between CO2 and climate throughout the Cenozoic, with peak CO2 levels of ∼1,500 ppm in the Eocene greenhouse, decreasing to ∼550 ppm in the Miocene, and falling further into ice age world of the Plio–Pleistocene. Around two-thirds of Cenozoic CO2 drawdown is explained by an increase in the ratio of alkalinity to dissolved inorganic carbon, likely linked to a change in the balance of weathering to outgassing, with the remaining one-third due to changing ocean temperature and major ion composition. Earth system climate sensitivity is explored and may vary between different time intervals. The Cenozoic CO2 record highlights the truly geological scale of anthropogenic CO2 change: Current CO2 levels were last seen around 3 million years ago, and major cuts in emissions are required to prevent a return to the CO2 levels of the Miocene or Eocene in the coming century. ▪ CO2 reconstructions over the past 66 Myr from boron isotopes and alkenones are reviewed and re-evaluated. ▪ CO2 estimates from the different proxies show close agreement, yielding a consistent picture of the evolution of the ocean-atmosphere CO2 system over the Cenozoic. ▪ CO2 and climate are coupled throughout the past 66 Myr, providing broad constraints on Earth system climate sensitivity. ▪ Twenty-first-century carbon emissions have the potential to return CO2 to levels not seen since the much warmer climates of Earth's distant past.

AB - Throughout Earth's history, CO2 is thought to have exerted a fundamental control on environmental change. Here we review and revise CO2 reconstructions from boron isotopes in carbonates and carbon isotopes in organic matter over the major climate transition of the past 66 million years. We find close coupling between CO2 and climate throughout the Cenozoic, with peak CO2 levels of ∼1,500 ppm in the Eocene greenhouse, decreasing to ∼550 ppm in the Miocene, and falling further into ice age world of the Plio–Pleistocene. Around two-thirds of Cenozoic CO2 drawdown is explained by an increase in the ratio of alkalinity to dissolved inorganic carbon, likely linked to a change in the balance of weathering to outgassing, with the remaining one-third due to changing ocean temperature and major ion composition. Earth system climate sensitivity is explored and may vary between different time intervals. The Cenozoic CO2 record highlights the truly geological scale of anthropogenic CO2 change: Current CO2 levels were last seen around 3 million years ago, and major cuts in emissions are required to prevent a return to the CO2 levels of the Miocene or Eocene in the coming century. ▪ CO2 reconstructions over the past 66 Myr from boron isotopes and alkenones are reviewed and re-evaluated. ▪ CO2 estimates from the different proxies show close agreement, yielding a consistent picture of the evolution of the ocean-atmosphere CO2 system over the Cenozoic. ▪ CO2 and climate are coupled throughout the past 66 Myr, providing broad constraints on Earth system climate sensitivity. ▪ Twenty-first-century carbon emissions have the potential to return CO2 to levels not seen since the much warmer climates of Earth's distant past.

KW - CO2

KW - Boron isotopes

KW - Alkenones

KW - Climate

KW - Cenozoic

U2 - 10.1146/annurev-earth-082420-063026

DO - 10.1146/annurev-earth-082420-063026

M3 - Article

VL - 49

SP - 609

EP - 641

JO - Annual Review of Earth and Planetary Sciences

JF - Annual Review of Earth and Planetary Sciences

SN - 0084-6597

ER -

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