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.
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We thank Jiuhua Geng., Yufen Li. and Fei Yu, the managers of Xinglong Cave, for their assistance in field. We are grateful to Dr. Meiliang Zhang for his beneficial suggestions during sampling in the cave. We especially thank the three anonymous reviewers for their positive comments and constructive suggestions. This research was supported by the National Natural Science Foundation of China (Grant No. 41402164, 41472150 and 41230524), National Basic Research Program of China (Grant No. 2013CB955902) and the Postdoctoral Science Foundation of China (Grant No. 2014M561049). This project was also partially supported by NSF 1103403.