中文摘要：

在空中的大小被收集在期间一逐步上升，在乱层云以内，云在 2005 年 6 月 21 日在吉林省上与冷旋涡消沉联系了学习云结构和冰粒子系列。乱层云的融化的层清楚地在雷达图象被定义。乱层云的 microphysical 结构被一根国王液体水探针和粒子测量系统(下午) 探针在研究飞机上阐明。下午 2-D 图象提供了冰水晶转变的详细信息。supercooled 云的厚层被观察，并且在从 -3?? 敲畤散 ? 灳捡 ? 祢映瑩楴杮漠獢牥慶楴湯 ? 楷桴栠獩潴楲慣? 楴敭猠牥敩 ? 敧敮慲整 ? 祢琠敨洠摯汥 的温度的高冰粒子集中

英文摘要：

Airborne measurements were collected during a stepwise ascent within a nimbostratus cloud associated with a cold vortex depression over the Jilin Province on 21 June 2005 to study cloud structure and ice particle spectra. The melting layer of the nimbostratus was clearly defined in the radar images. The microphysical structure of the nimbostratus was elucidated by a King liquid water probe and Particle Measuring Systems （PMS） probes aboard the research aircraft. The PMS 2-D images provided detailed information of ice crystal transformations. A thick layer of supercooled cloud was observed, and the high ice particle concentrations at temperatures ranging from -3℃ to -6℃ were consistent with Hallett-Mossop ice multiplication. The shape of ice crystals from near the cloud top to the melting layer were in the form of columns, needles, aggregations, and plates. In addition, significant horizontal variability was evident on the scale of few hundred meters. Particle spectra in this cloud were adequately described by exponential relationships. Relationship between the intercept （No） and slope （2） parameters of an exponential size distribution was well characterized by a power law.