云南鹤庆盆地30ka以来的古气候与环境变迁

Paleoclimatic and Environmental Changes over the Last 30000 Years in Heqing Basin, Yunnan Province

通过云南鹤庆钻孔（HQ孔）顶部8．11m岩芯剖面样品的多项环境指标的综合分析，重建了云南鹤庆盆地30kaBP以来的古气候环境演化历史．研究表明．该区气候在千年时间尺度上表现为冷湿与暖于组合交替的特点．本次冰盛期．为明显的冷湿环境．表现为最高潮面；盆地于晚冰期，约14．2kaBP始被切开．造成环境指标的大变化；进入全新世后，则以温干环境为主导，出现数次冷事件，后者是与东南季风区进行比较研究的桥梁．

Heqing Basin lies in the ecotones of the southeast monsoon and southwest monsoon.According to the synthetic analysis of the top 8. 11m core, we have reconstructed the history of paleoclimatic and environmental changes in the past 30ka. The study suggsts that Heqing Basin underwent a climate of cold-wet and warm-dry on a long-time scale. During the lastGlaciation. perhaps because of the frontal surface, there appeared great precipitation.responsible for the highest lake level. At the beginning of the Post Glacial. about 14. 2kaBP.the basin was cut off.