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南京葫芦洞石笋(No.H82)高分辨率δ18O序列已表明16.5~10.3kaBP时段东亚季风与极地气候在千年尺度事件上存在耦合关系.现根据7个高精度230Th年龄和573个δ18O数据,将这一石笋的高分辨率δ18O时间序列延伸至22.1kaBP,从而提供了末次盛冰期10a分辨率的连续东亚季风气候记录.石笋δ18O记录表明H1事件内部的次级季风减弱事件与格陵兰寒冷事件在世纪尺度上具有同步性.该记录显示在19.9~17.1kaBP存在显著的东亚夏季风增强事件,其平均夏季风强度相当于B?lling暖期的1/2,夏季风最强时甚至接近于B?lling暖期.这一季风增强事件在北半球海洋和陆地记录中均有不同程度的体现,可能是热带太平洋Super-ENSO响应于岁差周期太阳辐射的结果.
The high resolution δ18O sequence of stalagmite (No.H82) in Nanjing shows that there is a coupling relationship between the East Asian monsoon and the polar climate on the 1000-scale event from 16.5 to 10.3ka BP. Based on the 7 high precision 230Th ages and 573 δ18O data, The high-resolution δ18O time series of this stalagmite extends to 22.1 ka BP, thus providing a continuous East Asian monsoon climate record of the last glacial lOa resolution.The stalagmite δ18O records indicate that the sub-monsoon weakening event in H1 event is similar to that in Greenland cold event in the century scale The records show that there is a significant East Asian summer monsoon enhancement event from 19.9 to 17.1 kaBP, with an average summer monsoon intensity equivalent to 1/2 of B? Lling warm period and close to B? Lling at the strongest summer monsoon In the warm season, the monsoon enhancement events are reflected to varying degrees in the Northern Hemisphere ocean and land records, which may be the result of the tropical Pacific Super-ENSO response to solar radiation in precession cycle.