强对流降水前大气层结因子的分析  

AN ANALYSIS OF ATMOSPHERIC STRATIFICATION FACTORS BEFORE SEVERE CONVECTIVE PRECIPITATION

作　　者：钟晓平 

机构地区：[1]成都高原气象科学研究所,成都610072

出　　处：《应用气象学报》1993年第4期408-414,共7页Journal of Applied Meteorological Science

摘　　要：根据单站探空资料,对有、无强对流降水两类个例进行了对比分析.利用数理统计中的显著性检验方法筛选了14个在强对流降水前大气垂直层结中有明显指示作用的因子,其中K 指数、γ与γ_m 在各层中差值的绝对最大值等7个因子的指示作用最明显.这些因子表示了大气层结的对流不稳定、条件不稳定、水汽含量和整层大气的垂直均匀性,可用于短时强对流降水的分析和预报.After analysing of cases with and without severe convective precipitation,fourteenfactors,which have special indication in a short time before precipitation,have beenscreened out by using the significance test method from sounding data at a single sta-tion.More remarkable instructive seven factors denoting the convective instability,con-ditional instability,contents of moisture,and homogeneity of atmosphere vertical strati-fication for torrential rains are given.These factors can apply to the short-range forecastfor the severe precipitation.

关 键 词：强对流 降水 预报因子 大气层 

分 类 号：P448[天文地球—大气科学及气象学]