Climatic bisection of the last interglacial warm period in the Polar North Atlantic
Climatic bisection of the last interglacial warm period in the Polar North Atlantic
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DOI：
10.1016/j.quascirev.2011.05.012
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发表时间：
2011-07-01
影响因子：
4
通讯作者：
Erlenkeuser, Helmut
中科院分区：
文献类型：
--
作者：
Bauch, Henning A.;Kandiano, Evguenia S.;Erlenkeuser, Helmut
来自挪威海的埃米安间冰期 (MIS5e) 的新多代理海洋数据表明，夏季有接近冰河表面海洋温度 (3-4 摄氏度) 的寒冷事件。峨眉中期的降温将原本相对温暖的间冰期气候分开，并与大气环流和海洋稳定性变化导致的冬季海冰和极地水团的广泛扩张有关。虽然数据还证实了最后一次间冰期暖峰的出现较晚，而不是较早，这与北半球日照最大值和全新世早期的区域气候进程总体上不协调，但与更南的地区相比，寒冷事件本身可能有助于推迟极地北部最后一次间冰期气候的发展。极地地区的这种“气候脱钩”可能会对利用峨眉山条件来帮助评估间冰期变暖期间北极冰冻圈的当前和未来状态产生深远的影响。 (C) 2011 Elsevier Ltd. 保留所有权利。
New multiproxy marine data of the Eemian interglacial (MIS5e) from the Norwegian Sea manifest a cold event with near-glacial surface ocean summer temperatures (3-4 degrees C). This mid-Eemian cooling divided the otherwise relatively warm interglacial climate and was associated with widespread expansions of winter sea-ice and polar water masses due to changes in atmospheric circulation and ocean stability. While the data also verify a late rather than early last interglacial warm peak, which is in general disharmony with northern hemisphere insolation maximum and the regional climatic progression of the early Holocene, the cold event itself was likely instrumental for delaying the last interglacial climate development in the Polar North when compared with regions farther south. Such a 'climatic decoupling' of the Polar region may bear profound implications for the employment of Eemian conditions to help evaluate the present and future state of the Arctic cryosphere during a warming interglacial. (C) 2011 Elsevier Ltd. All rights reserved.