中文摘要：

通过对荔波董哥洞石笋进行高精度的ICP-MS或TIMS-U系测年和碳、氧同位素分析，建立了荔波地区2 300a B.P.来高分辨率的古气候变化的时间序列。研究结果表明，贵州荔波地区2 300a B.P.以来石笋记录的季风气候变化，大致可分为8个气候（亚）期：①2300～1 800a B.P.为降温期，显示东亚夏季风减弱，东亚冬季风增强，气候干旱寒冷；②1 800～1 080a B.P.气温有所回升，显示东亚冬季风缓慢减弱，东亚夏季风有所回升，表现为半湿润的温凉气候期；③1 080～680a B.P.为降温期，气温再次下降，显示东亚冬季风再次增强，但降水相对增大，表现为寒冷湿润的气候期，是气候变化的关键转折时期；④680～550a B.P.温暖期，显示东亚夏季风再次增强，气温升高，降水增大，表现为温暖湿润的气候期。⑤550～400a B.P.寒冷期，显示东亚冬季风快速增强，气温下降，表现为寒冷湿润的气候环境，是近1 000年以来最冷的时期；⑥400～364a B.P.温凉期，显示东亚夏季风有所增强，气温有所回升，表现为温凉湿润气候环境；⑦364～324a B.P.冷凉期，显示东亚夏季风有所减弱，气温有所下降，表现为冷凉湿润气候环境；⑧324a B.P.至今，气候相对波动期，同位素记录曲线呈锯齿状波动，在其内包括若干个冷凉半湿润、冷湿的气候变化亚阶段。 根据荔波董哥洞石笋的高分辨率的古气候变化的连续记录，揭示了荔波地区2 300a B.P.以来的一些百年尺度的重大气候事件——干旱寒冷期、隋唐温暖期（或小温暖期）、小寒冷期以及一些十年尺度的降水、温度变化。石笋记录的这种百年、十年尺度的突发性气候变化事件，与冰芯记录极为相似，反映低纬度地区石笋记录的季风气候与高纬度及北极地区的气候具有极好的相关性，这对于认识现代气候系统变化以及对未来十年一百年尺度的气

英文摘要：

The time sequence of high resolution paleoclimatic change since 2 300 a B.P. has been reconstructed by dating ages of the high precision ICP-MS or TIMS-U series and the analysis of the carbon and oxygen isotopes from a stalagmite of Dongge cave in the area of Libo, Guizhou. The study showed that the records of the warm and cold events from a stalagmite since 2 300 a B. P. in the area of Libo reflected the paleoclimatic change which can be divided into eight stages： （ 1 ） Falling temperature stage from 2 300 a B. P. to 1 800 a B. P. showed that the East Asian summer monsoon became weakly and winter monsoon became strongly, the air temperature gradually fallen, the available rainfall reduced, and they represented the dry and cold climate environment; （2） Rising temperature stage from 1 080 a B. P. indicated that the East Asian winter monsoon slowly weaken 1 800 a B. P. to and summer monsoon slightly strengthened, and they represented the semi-humid and warm-cool climate environment. （3） Dropping temperature time from 1 080 a B. P. to 680a B.P. showed that the winter monsoon strengthened again, the air temperature reduced again, and the available rainfall relatively increased in winter, and they represented the cold and humid climate environment. This stage was the key transition period of climate change. （4） Warm period from 680 a B. P. to 550 a B.P. revealed that the East Asian summer monsoon strengthened again, the air temperature rose, the available rainfall relatively increased in summer, and they represented the warm and humid climate environment. （5） The cold period from 550 a B.P. to 400 a B. P. indicated that the East Asian winter monsoon rapidly strengthened, the air temperature quickly dropped and the available rainfall increased a lot, and they represented the cold and humid climate environment. This stage was the coldest stage in the last 1000 years. （6） Warm-cool period from 400 a B. P. to 364 a B.P. revealed that the East Asian summer monsoon slightly strengthen, the air temp