中文摘要：

据湖北青天洞和南京葫芦洞石笋9个^230Th年龄和430个δ18O测试数据，建立了18．4～14．4kaBP平均分辨率7～8a的东亚季风时间序列。在共同生长时段（17．5～16和18．4～17．5kaBP），两个洞穴石笋给出了数十年尺度几乎完全一致的δ18O信号，证明了石笋δ18O记录可靠地反映了大尺度区域性季风环流及其水气同位素分馏变化。17．7和16．1kaBP左右，石笋δ18O值明显正偏，振幅达2‰，指示两次显著的弱夏季风事件，与北大西洋冰漂碎屑事件H1b和H1a同步发生，可视为东亚季风气候系统对北大西洋H1事件的一种响应，18．3～17．7kaBP期间，东亚季风区存在强季风降水事件，平均强度相当于Bolling暖期的1／2，最湿润时甚至接近于Bolling暖期降水强度，可能与北大西洋经向翻转环流的强度变化有关，这一强降水事件内部干湿旋回变化周期与Gleissberg太阳活动周期极为吻合。

英文摘要：

A 7-8 year resolution oxygen isotope record, based on 9^230Th data and 430δ18O data of three stalagmites, provides a history of the Asian Monsoon during a time interval from 18.4 to 14.4 kaBP. The fact that the fairly good replication of δ18O signal in the multidecadal-scale at periods when the stalagmites from Qingtian Cave and Hulu Cave grew contemporaneously （17.5-16 kaBP and 18.4-17.5 kaBP） indicates that the δ18O signal from these two localities recorded climatic changes and that changes in the mon- soon were similar over a large area of China. There are two remarkable weak summer monsoon events at 17.7 kaBP and -16.1 kaBP in our stalagmite δ18O records which show a dramatic positive shift of 2‰ in δ18O, coincident within error with Hlb and Hla in the North Atlantic. There may have been a strong monsoon precipitation event in the interval from 18.3 to 17.7 kaBP, equivalent to half of the average level of Bolling Warming. This strong monsoon precipitation event may be ascribed to response to changes of the Atlantic Meridional Overturning Circulation. Six wet-dry fluctuations with a pace of 80-90 years that is similar to Gleissberg cycle of the solar activity are superimposed on this event. Our data show that the monsoon variability of these frequencies may have resulted from changes of solar activity.