强对流降水前大气层结因子的分析

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γm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。

An Analysis of Atmospheric Stratification Factors Before Severe Convective Precipitation

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.