山西省人工增雨天气条件研究

为了使人工增雨更有针对性,需要在作业方案制定阶段就对未来影响天气系统有一个明确的判断,需要总结出一套适合山西省进行人工增雨作业的天气概念模型.为此,普查了1991～2000年欧亚范围高空及地面天气图,筛选出影响山西省并产生降水的天气系统,加以分析归纳,建立了4种有利于山西省人工增雨作业的天气概念模型,即西风槽型、华北冷涡型、切变线型及副热带高压型,并分别给出了未来12～24 h影响山西省的警戒区及最佳人工增雨作业区.

Precipitation Enhancement Weather Condition Research in Shanxi Province

To enhance the effectiveness of artificial precipitation operation in Shanxi Province, it is necessary to estimate the influencing weather systems accurately when operation begins and develop conceptual synoptic models of precipitation enhancement operation. Four types of synoptic models (westerly trough, north cold cyclone, shear linear, and subtropical high) were established on the basis of an analysis of the characteristics of atmospheric circulation affecting precipitation over Shanxi Province and a survey of the upper-level and ground weather charts of the Eurasian region from 1991 to 2000. The precautionary areas for the next 12 h to 24 h and the optimized seeding areas for precipitation enhancement in Shanxi Province can be obtained.