江苏省六、七月12小时降水场的定量描述和客观分类

QUANTITATIVE DESCRIPTION AND OBJECTIVE CLASSIFICATION OF THE FIELDS OF 12-hr RAINFALL OVER JIANGSU PROVINCE FOR JUNE TO JULY,1975—80

摘要:

本文对江苏省1975—1980年6—7月共732个12小时时段降水样本场,进行了定量描述和客观分类。讨论了三个问题:第一,如何减小短期降水场在量值和分布上的不稳定性和不均匀性,以便于定量描述;第二,提取降水场的特征参数,达到浓缩场量的目的;第三,用特征参数对降水场的雨量量级和分布两方面进行客观聚类分析。效果是令人满意的。

Abstract:

An analysis is made of a sample of 732 12-hr rainfall fields forJune to July, 1975-80, to yield a quantitative description and objectiveclassification. Three aspects are examined: (i) how to reduce the in-stability and inhomogeneity in magnitude and distribution of the short-term precipitation fields to facilitate quantitative description; (ii)how to select the characteristic parameters in order to condense thefield quantities and (iii) the objective scattering analysis of different categories of rainfall amount and distribution, using these characteristic parameters. The results are found to be satisfactory.