北京地区局地强风暴发生的环境条件  

The Environmental Conditions of the Genesis of Severe Local Storm in Beijing Area

作　　者：王沛霖 许丽章 孙力 

机构地区：[1]中山大学大气科学系

出　　处：《中山大学学报（自然科学版）》1996年第2期113-117,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

摘　　要：采用１９８０～１９８８年北京地区局地强风暴和北京探空资料，研究了本地区局地强风暴发生的环境条件，有利的环境条件是：对流层低层为低压；层结不稳定和中下层位势不稳定；中低层水汽含量高和对流层深厚气层中相对湿度大．局地强风暴生成与中层干燥、高空强风和垂直风速切变无明显关系．By use of the daily data of severe local storm in Beijing area and Beijing's sounding from April to September of 1980￣1988, the favourable conditions for the storm genesis are identified. They are (1) low pressure in the lower troposphere, (2) unstable stratification in the troposphere and POtential instability in the middle-low troposphere, (3) high vapour content in the lower troposprere and large relative humidity in a deep tropospheric layer. The storm genesis is independent of strong wind in high tropsphere, vertical wind speed shear and dryness in the middle troposphere.

关 键 词：北京 局地强风暴 环境条件 风暴 预报 

分 类 号：P457.9[天文地球—大气科学及气象学]