Onset and duration of transitions into Greenland Interstadials 15.2 and 14 in northern China constrained by an annually laminated stalagmite.
Onset and duration of transitions into Greenland Interstadials 15.2 and 14 in northern China constrained by an annually laminated stalagmite.
复制标题
中国北方每年层状石笋限制向格陵兰 Interstadials 15.2 和 14 过渡的开始和持续时间
DOI：
10.1038/srep20844
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发表时间：
2016-02-10
影响因子：
4.6
通讯作者：
Edwards RL
中科院分区：
文献类型：
--
作者：
Duan W;Cheng H;Tan M;Edwards RL
考虑到格陵兰冰芯的层状计数年代学具有极好的相对不确定性，可以详细研究向Dansgaard-Oeschger （DO）事件突变的开始和持续时间。然而，对于其他地质档案而言，由于缺乏明确的年层，较短的间隔不能准确确定。本文报道了中国北方兴隆洞一石笋的氧同位素记录，石笋年代层发育良好，覆盖DO 15和DO 14。除了缺少格陵兰冰芯间隔（GIS） 15.1之外，该记录的模式与格陵兰冰芯在千年尺度上的模式以及GIS 14中详细的百年尺度冷却漂移非常相似。此外，在层流计数的约束下，向GIS 15.2和GIS 14的转变分别持续了74年和27年，两者都与GICC05时间尺度上的NGRIP记录（分别为100±6年和20±1年）非常吻合。格陵兰岛和中国北方在千年至年代际尺度上的气候突变振荡的密切耦合意味着北大西洋和东亚夏季风区之间可能通过西风带存在快速的大气遥相关。
The onset and duration of abrupt transitions into Dansgaard-Oeschger (DO) events can be studied in detail in Greenland ice cores given the excellent relative uncertainty of its lamina-counting chronology. For other geological archives, however, the shorter intervals are not determined accurately due to lack of clear annual lamina. Here, we present an oxygen isotope record of a stalagmite with well-developed annual lamina from Xinglong Cave, northern China, covering DO 15 and 14. Except for the absence of Greenland Interstadial (GIS) 15.1, the pattern of this record strongly resembles that of Greenland ice cores on millennial scales as well as the detailed centennial-scale cooling excursions within GIS 14. Additionally, the transitions into GIS 15.2 and 14, constrained by lamina counting, lasted 74 and 27 yr, respectively, both of which are in excellent agreement with that of the NGRIP record on the GICC05 timescales (100 ± 6 and 20 ± 1 yr, respectively). The close coupling of abrupt climatic oscillations on millennial to decadal scales between Greenland and northern China implies a rapid atmospheric teleconnection between the North Atlantic and the East Asian Summer Monsoon regions, probably via the westerlies.