Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation

Jeremy D. Shakun, Peter U Clark, Feng He, Shaun A. Marcott, Alan C. Mix, Zhengyu Liu, Bette Otto-Bliesner, Andreas Schmittner, Edouard Bard

    Research output: Contribution to journalArticle

    489 Citations (Scopus)

    Abstract

    The covariation of carbon dioxide (CO2) concentration and temperature in Antarctic ice-core records suggests a close link between CO2 and climate during the Pleistocene ice ages. The role and relative importance of CO2 in producing these climate changes remains unclear, however, in part because the ice-core deuterium record reflects local rather than global temperature. Here we construct a record of global surface temperature from 80 proxy records and show that temperature is correlated with and generally lags CO2 during the last (that is, the most recent) deglaciation. Differences between the respective temperature changes of the Northern Hemisphere and Southern Hemisphere parallel variations in the strength of the Atlantic meridional overturning circulation recorded in marine sediments. These observations, together with transient global climate model simulations, support the conclusion that an antiphased hemispheric temperature response to ocean circulation changes superimposed on globally in-phase warming driven by increasing CO2 concentrations is an explanation for much of the temperature change at the end of the most recent ice age.
    LanguageEnglish
    Pages49+
    JournalNature
    Volume484
    Issue number7392
    DOIs
    Publication statusPublished - Apr 2012

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    last deglaciation
    global warming
    carbon dioxide
    temperature
    Pleistocene
    ice core
    meridional circulation
    deuterium
    deglaciation
    marine sediment
    Southern Hemisphere
    global climate
    climate modeling
    Northern Hemisphere
    surface temperature
    warming
    climate change
    climate
    simulation

    Cite this

    Shakun, J. D., Clark, P. U., He, F., Marcott, S. A., Mix, A. C., Liu, Z., ... Bard, E. (2012). Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation. Nature, 484(7392), 49+. https://doi.org/10.1038/nature10915
    Shakun, Jeremy D. ; Clark, Peter U ; He, Feng ; Marcott, Shaun A. ; Mix, Alan C. ; Liu, Zhengyu ; Otto-Bliesner, Bette ; Schmittner, Andreas ; Bard, Edouard. / Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation. In: Nature. 2012 ; Vol. 484, No. 7392. pp. 49+.
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    abstract = "The covariation of carbon dioxide (CO2) concentration and temperature in Antarctic ice-core records suggests a close link between CO2 and climate during the Pleistocene ice ages. The role and relative importance of CO2 in producing these climate changes remains unclear, however, in part because the ice-core deuterium record reflects local rather than global temperature. Here we construct a record of global surface temperature from 80 proxy records and show that temperature is correlated with and generally lags CO2 during the last (that is, the most recent) deglaciation. Differences between the respective temperature changes of the Northern Hemisphere and Southern Hemisphere parallel variations in the strength of the Atlantic meridional overturning circulation recorded in marine sediments. These observations, together with transient global climate model simulations, support the conclusion that an antiphased hemispheric temperature response to ocean circulation changes superimposed on globally in-phase warming driven by increasing CO2 concentrations is an explanation for much of the temperature change at the end of the most recent ice age.",
    author = "Shakun, {Jeremy D.} and Clark, {Peter U} and Feng He and Marcott, {Shaun A.} and Mix, {Alan C.} and Zhengyu Liu and Bette Otto-Bliesner and Andreas Schmittner and Edouard Bard",
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    Shakun, JD, Clark, PU, He, F, Marcott, SA, Mix, AC, Liu, Z, Otto-Bliesner, B, Schmittner, A & Bard, E 2012, 'Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation', Nature, vol. 484, no. 7392, pp. 49+. https://doi.org/10.1038/nature10915

    Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation. / Shakun, Jeremy D.; Clark, Peter U; He, Feng; Marcott, Shaun A.; Mix, Alan C.; Liu, Zhengyu; Otto-Bliesner, Bette; Schmittner, Andreas; Bard, Edouard.

    In: Nature, Vol. 484, No. 7392, 04.2012, p. 49+.

    Research output: Contribution to journalArticle

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    AU - Shakun, Jeremy D.

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    AU - Liu, Zhengyu

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    AB - The covariation of carbon dioxide (CO2) concentration and temperature in Antarctic ice-core records suggests a close link between CO2 and climate during the Pleistocene ice ages. The role and relative importance of CO2 in producing these climate changes remains unclear, however, in part because the ice-core deuterium record reflects local rather than global temperature. Here we construct a record of global surface temperature from 80 proxy records and show that temperature is correlated with and generally lags CO2 during the last (that is, the most recent) deglaciation. Differences between the respective temperature changes of the Northern Hemisphere and Southern Hemisphere parallel variations in the strength of the Atlantic meridional overturning circulation recorded in marine sediments. These observations, together with transient global climate model simulations, support the conclusion that an antiphased hemispheric temperature response to ocean circulation changes superimposed on globally in-phase warming driven by increasing CO2 concentrations is an explanation for much of the temperature change at the end of the most recent ice age.

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