中文摘要：

利用X波段双偏振多普勒雷达观测的祁连地区地形云个例资料，对比分析了3°、9°和14°坡度与不同影响气流下形成的地形云特征。结果表明，夏季祁连地区在不同影响气流和不同坡度条件下形成的地形云差异显著，沿坡生成的单体数量、强度及内部动力、微物理过程和优势粒子分布特征均有明显差异，深入研究不同条件下的地形云将有助于科学开展地形云人工增雨作业。

英文摘要：

Based on the topographic cloud cases over Qilian Mountain observed by X-band dual-polarized Doppler weather radar,the characteristics of different topographic clouds on 3°,9° and 14° terrain slope and different weather systems were analyzed. The results showed that the topographic clouds over Qilian Mountain in summer were significantly different under different terrain slope and airflow of weather system conditions. These differences appeared in the number,intensity,internal motivation,microphysical process and dominant particle distribution of cloud cells. Therefore,the further research about topographic clouds with different conditions would be help to scientifically carry out artificial rainfall of topographic clouds.