The width of raindrop size distribution in the warm area was narrow and its shape was single model . simulating results of one - dimension stratus model showed that the content of cloud water that grew up by deposition process was the largest in the warm area , and cloud water existed between 2km and 6km . in the warm area , the formation of rain water which existed between 1km and 4km was behind of the formation of cloud water , and the development of rainwater was depend on collecting cloud water 一维层状云模式模拟结果表明，暖区以凝华增长的云水为主，云水分布在2 6km高度；雨水在云水形成后产生，分布在1 4km之间，主要通过碰并云水增长；霰在雨水形成后产生，主要通过碰并云水增长，分布在云水区的中下层，霰形成后，雨水主要由霰融化产生。
This work aims at studying multi - scale structures of large - scale stratiform precipitating clouds typical of henan province of central - eastern china in spring and autumn drought periods of china , the potentials and techniques of artificial rain increase . through analysis of historical weather / climate and cloud physical data , developed are a number of multi - scale observational schemes including intensive observational items , and space / time resolutions of data for integrative field observations to obtain real - time measurements of the structures at large - , medium - , small - and micro - scale . from analysis of observed separate items , their integrative treatment and numerical simulation we place focus on case studies and their integration in investigating such structures of stratiform precipitating clouds over the target region , rainfall physical mechanisms and exploitation of artificial rainfall increase potentials , whereupon a conceptual model is constructed and a range of catalysis schemes are proposed to improve smaller - scale forecasting accracy and techniques for the rainfall increase , with the dominant results given below 以地处中原、具有典型代表意义的河南层状降水云系为主要研究对象，在对该地历史天气气候和云物理等资料分析的基础上，研究设计云系多尺度观测方案(包括加密观测项目、观测时空分辨率) ，实施有设计的外场综合观测，获取云系结构多尺度(大、中、小、微)配套的实时观测资料；通过对各种观测资料的分项和综合处理分析，以典型个例观测和数值模拟分析研究为重点，综合多个例分析，研究河南层状降水云系多尺度宏微观结构特征、降水物理机制和人工增雨潜力条件，建立典型层状云系人工增雨概念模型，研究科学的人工增雨作业技术系统。
The macro characteristics of status cloud systems have been studied by using every 3 - hour sounding data , satellite cloud pictures , radar echoes , synoptic charts , surface rainfall , raindrop size distribution and microwave radiometer . the spatial distribution of precipitation particles and the mechanisms of their formation were studied by one - dimension stratus model . thus , spring stratus precipitation conceptual model was primarily established in henan province 利用3小时一次的加密探空资料、卫星云图、雷达回波图、天气图、地面雨量、雨滴谱、微波辐射计等资料，分析了降水云系的宏观特征，并利用一维层状云模式研究了降水粒子的时空分布和水质粒形成的微物理特征，由此初步建立了河南省春季层状云降水的概念模型。
And such zones act as an important dynamic condition for low - level water transfer and also a favorable environmental condition for " seeding - water supply " . there stronger echoes are detected , meaning that bubble convection develops in the precipitating fields of the clouds that are homogeneous in the main , causing centers of > 10 mm / hr surface rainfall to occur and migrate 这些不稳定区是低层水汽输送摘要重要的动力条件，也是“播撒一供应”机制发生的有利的湿热力环境条件，云系较强降水回波在这里得到发展，使整体均匀的冷锋层状云系降水场有较强回波带和对流泡发展，带来地面有> 10mmlh较强降雨中心产生和移动。
