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本文依据龙感湖钻孔的孢粉及硅藻资料，探讨了该地区近３０００年来的植被发展及气候变化。通过数值分析方法，重建了年均温及年降水的时间序列。发现气候波动存在两个阶段（依１．５ｋａＢ．Ｐ．前后划分）、四个旋回（０．８ｋａ的准周期），两个突变事件（３ｋａＢ．Ｐ．前后的冷暖急剧变化及１ｋａＢ．Ｐ．的降温事件）。这些变化与敦德冰心及固城湖孢粉反映的气候波动有较好的一致性，具有全球变化意义
Based on the data of sporopollen and diatom in the borehole of Longjuehu Lake, the paper discussed the vegetation development and climate change in the area in the past 3000 years. Through numerical analysis, the time series of annual average temperature and annual precipitation are reconstructed. It is found that there are two phases of climate fluctuation (before and after division according to 1.5kaB.P.), four cycles (0.8ka quasi-period), two sudden changes (3kaB.P. Of cooling events). These changes are in good agreement with the climatic fluctuations reflected by the ice core of Dude and Gucheng Lake and are of global significance