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Ice-sheet collapse and sea-level rise at the Belling warming 14,600 years ago

机译：在14,600年前的贝灵变暖中，冰盖坍塌和海平面上升

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在上次冰期末一次被称为“融水脉动1A”的事件中，发生了迅速的海平面上升。这次事件的精确幅度和发生时间仍然比较模糊，从而也使得气候作为力和随后的冰块反应不清楚。现在，Pierre Deschamps及其同事报告了在塔希提岛进行的一项大型珊瑚礁钻探项目的结果，确定“融水脉动1A”事件发生在距今14，650年和14，310年之间，这个时间正好与一次气候变暖高峰一致。当时海平面上升了14~18米。这样大幅度的海平面上升表明，南极洲的冰层融化可能对这些变化的发生做出了贡献，而这在以前是一个很有争议的问题。%Past sea-level records provide invaluable information about the response of ice sheets to climate forcing. Some such records suggest that the last deglaciation was punctuated by a dramatic period of sea-level rise, of about 20 metres, in less than 500 years. Controversy about the amplitude and timing of this meltwater pulse (MWP-1A) has, however, led to uncertainty about the source of the melt water and its temporal and causal relationships with the abrupt climate changes of the deglaciation. Here we show that MWP-1A started no earlier than 14,650 years ago and ended before 14,310 years ago, making it coeval with the Boiling warming. Our results, based on corals drilled offshore from Tahiti during Integrated Ocean Drilling Project Expedition 310, reveal that the increase in sea level at Tahiti was between 12 and 22 metres, with a most probable value between 14 and 18 metres, establishing a significant meltwater contribution from the Southern Hemisphere. This implies that the rate of eustatic sea-level rise exceeded 40 millimetres per year during MWP-1A.
机译：在上次冰期末一次被称为“融水脉动1A”的事件中，发生了迅速的海平面上升。这次事件的精确幅度和发生时间仍然比较模糊，从而也使得气候作为力和随后的冰块反应不清楚。现在，Pierre Deschamps及其同事报告了在塔希提岛进行的一项大型珊瑚礁钻探项目的结果，确定“融水脉动1A”事件发生在距今14，650年和14，310年之间，这个时间正好与一次气候变暖高峰一致。当时海平面上升了14~18米。这样大幅度的海平面上升表明，南极洲的冰层融化可能对这些变化的发生做出了贡献，而这在以前是一个很有争议的问题。%Past sea-level records provide invaluable information about the response of ice sheets to climate forcing. Some such records suggest that the last deglaciation was punctuated by a dramatic period of sea-level rise, of about 20 metres, in less than 500 years. Controversy about the amplitude and timing of this meltwater pulse (MWP-1A) has, however, led to uncertainty about the source of the melt water and its temporal and causal relationships with the abrupt climate changes of the deglaciation. Here we show that MWP-1A started no earlier than 14,650 years ago and ended before 14,310 years ago, making it coeval with the Boiling warming. Our results, based on corals drilled offshore from Tahiti during Integrated Ocean Drilling Project Expedition 310, reveal that the increase in sea level at Tahiti was between 12 and 22 metres, with a most probable value between 14 and 18 metres, establishing a significant meltwater contribution from the Southern Hemisphere. This implies that the rate of eustatic sea-level rise exceeded 40 millimetres per year during MWP-1A.

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  • 来源
    《Nature》 |2012年第7391期|p.559-564499|共7页
  • 作者

    Pierre Deschamps; Nicolas Durand; Edouard Bard; Bruno Hamelin; Gilbert Camoin; Alexander L. Thomas; Gideon M. Henderson; Junichi Okuno; Yusuke Yokoyama;

  • 作者单位

    CEREGE,UMR Aix-Marseille Universite-CNRS-IRD-Collegede France,Technopolede l'Arbois,BP 80,13545 Aix-en-ProvenceCedex4,France;

    CEREGE,UMR Aix-Marseille Universite-CNRS-IRD-Collegede France,Technopolede l'Arbois,BP 80,13545 Aix-en-ProvenceCedex4,France;

    CEREGE,UMR Aix-Marseille Universite-CNRS-IRD-Collegede France,Technopolede l'Arbois,BP 80,13545 Aix-en-ProvenceCedex4,France;

    CEREGE,UMR Aix-Marseille Universite-CNRS-IRD-Collegede France,Technopolede l'Arbois,BP 80,13545 Aix-en-ProvenceCedex4,France;

    CEREGE,UMR Aix-Marseille Universite-CNRS-IRD-Collegede France,Technopolede l'Arbois,BP 80,13545 Aix-en-ProvenceCedex4,France;

    Departmentof Earth Sciences,South Parks Road, Oxford 0X1 3AN, UK;

    Departmentof Earth Sciences,South Parks Road, Oxford 0X1 3AN, UK;

    Atmosphere and Ocean Research Institute and Department of Earth and Planetary Science, University of Tokyo, 5-1 -5 Kashiwanoha,Kashiwashi, Chiba 277-8564, Japan,National Institute of Polar Research, Tachikawashi, Tokyo 190-8518, Japan;

    Atmosphere and Ocean Research Institute and Department of Earth and Planetary Science, University of Tokyo, 5-1 -5 Kashiwanoha,Kashiwashi, Chiba 277-8564, Japan,Institute of Biogeosciences,JAMSTEC, Yokosuka 237-0061, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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