中文摘要：

基于神农架山宝洞石笋（SB46）的9个^230Th年龄和326个氧同位素数据，建立了末次冰期32．2—26．7kaB．P．和17．0～15．4kaB．P．的东亚季风降水序列。该序列和同一洞穴全新世石笋记录的对比发现，在MIS3晚期东亚季风区可能存在极强夏季风降水事件，相当于全新世季风强度，可能与岁差旋回太阳辐射及海陆水汽潜热释放增强有关。与葫芦洞石笋δ^18O记录和格陵兰冰芯δ^18O记录对比表明，东亚夏季风千年尺度气候振荡与高北纬地区海-气快速重组存在遥相关效应。山宝洞石笋年龄与葫芦洞石笋和格陵兰冰芯时标（SS09sea）在定年误差范围内基本一致，但山宝洞石笋与冰芯记录在DO事件的年龄、波形和持续时间上更为一致，不仅进一步说明了低纬季风气候与极地气温同步变化，而且有效地弥补了葫芦洞记录在这一时段的不足。

英文摘要：

The Shanbao Cave （ 31 °40′N, 110°26′E, 1902m above sea level） is located at the top of the Yanziya ,40km NW away from the Songbai Town,Shennongjia Natural Conservation, Hubei Province. Most of the peaks in this area are higher than 1500m and generally become lower from SW to NE. The mean annual rainfall and temperature at Shanbao Cave are 1900 - 2000mm and 8 - 9℃ and its relative humidity is about 95% （ measured in October, 2003 ）. We present a continuous record of the Asian monsoon from δ^18O measurements of stalagmite calcite for the period from 32.2kaB. P. to 26.7kaB. P. and 17.0kaB. P. to 15.4kaB. P. Over 326 oxygen isotopic measurements providing information on shifts in monsoon precipitation are combined with a chronology from 9 precise ^230Th dates, with a temporal resolution of 22a. Stable isotope measurements were run at the Isotope Laboratory of Nanjing Normal University with Finnegan MAT-253, yielding a standard deviation error of 0. 06‰. Nine ^230Th dates have analytical errors about 83 -272a, all in stratigraphic order. The measurements for ICP-MS dating were conducted at the Isotope Laboratory of Geology and Geophysics Department, Minnesota University, USA. The reported error is in ±2σ. The δ^18Ovalues vary from - 10. 5‰ to -5.2‰ throughout the whole record,with an amplitude of 5.3‰. The record approximately follows the Northern Hemisphere summer insolation variation ,with a number of millennial scale events superimposed on this trend. A comparison between our record and a previously published Holocene data from the same cave illustrates that the D-O events during the late MIS 3 was extremely strong,equivalent to the average level of the whole Holocene in oxygen isotopic values. These strong monsoon precipitation events may be a combined consequence of solar precessional insolation variations and latent heat release of moisture from ocean and continent. Millennial oscillations of East-Asian-Summer-Monsoon （EASM）recorded in the stalagmites are well related to the r