中文摘要：

利用中国暴雨试验（CHeRES）期间的外场试验加密观测资料和1°×1°的NCEP（National Centerfor Environmental Prediction）再分析资料对2002年6月18～19日长江中游的一次暖切变型强降水过程进行了诊断分析，该暖切变及其环境条件很有特色。结果表明：这次长江流域暖切变线是一个较为浅薄的系统，尽管系统并不深厚，但它具有明显的突发性和局地性，且引发了该地区的强降水；卫星TBB（Black Body Tempera—ture）资料和多普勒雷达资料揭示，沿暖切变上形成的多个口中尺度对流系统是这次暴雨的直接制造者；该暖切变线和高空急流在长江流域产生的低空辐合与高空辐散配置，为暴雨的产生提供了非常有利的大尺度环境；此外，低空急流在本次过程中也有重要的影响，不但给暴雨区输送了足够的水汽，使暖空气明显向北推进，还对不稳定能量的增强和维持起了重要的作用；不稳定能量的释放对中尺度对流系统的发展亦有重要贡献。在研究工作的基础上提出了该暖切变暴雨的概念模型。最后，对暖切变暴雨类型的多样性做了讨论。

英文摘要：

Using intensive observation data and 1°×1° NCEP （National Center tor Environmental Prealcuon） reanalysis data during China Heavy Rainfall Experiment （CHeRES）, the diagnosis for the strong rainfall associated with warm shear line in the middle reaches of the Yangtze River on 18-19 June 2002 has been conducted. The results show that the warm shear line was a shallow system below 700 hPa, whereas it was a sudden occurrence and local strong system. The analysis of satellite images and radar data indicated that the heavy rainfall was caused directly by meso-β convective systems along warm shear line; the convergence caused by warm shear line in low level and the divergence in high level by upper level jet （ULJ） provided favorable large scale conditions for occurrence of the strong rainfall Low level jet （LLJ） could play an important role in occurrence of heavy rainfall, because it transported the very rich water vapor northward, moving of warm air was very favorite to production and maintenance of instable energy. In addition, the convergence in low level also contributed significantly to development of the meso-β convective systems and release of instable energy, Based on these, the conceptual model of warm shear line causing the heavy rainfall in the Yangtze River has been proposed. At last, diversity of heavy rainfall associated with warm shear line was discussed.