珠江三角洲局地强风暴发生的环境条件

ON THE GENESIS CONDITIONS OF SEVERE LOCAL STORMS IN THE PEARL RIVER DELTA

中文摘要:

      中纬度地区局地强风暴发生的环境条件已有过许多研究[1-6],陶诗言[7]归纳出三个必要条件：(1)对流层中下层为明显位势不稳定,(2)有强的垂直风切变,(3)中层十分干燥。同类的热带地区研究工作比较少见。本文根据1976-1983年3-8月出现在珠江三角洲的局地强风暴和广州站逐日08时探空资料,分析了各月局地强风暴发生的有利和不利条件。发现本地区局地强风暴发生的环境条件与中纬地区相比,在垂直风切变、中层湿度和稳定度等方面是不同的。

英文摘要:

      By use of the data of severe local storms in the Pearl River Delta and from Guangzhou's sounding from March to August of 1976-1983,the favorable and unfavorable conditions of the genesis of the storms in the area,which is situated in the tropics,are analysed.And the conditions are compared with those in the extratropics.The conclusions in this paper could be helpful to forecasting and understanding of the storms in the Delta.