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气象:2007,33(11):87-92
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吉林省旬降水量的客观分级方法探讨
(1.吉林省气象台,长春 130062;2.黄淮学院数学系)
Discussion on the Objective Classification Method for Ten day Rainfall of Jilin Province
(1.Jilin Meteorological Observatory, Changchun 130062;2.Mathematic Department,Huanghuai University)
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投稿时间:2007-01-23    修订日期:2007-09-10
中文摘要: 根据吉林省现行旬降水量等级划分标准和办法,提出了一种基于降水概率分布函 数 的客观划分办法。该方法引入Z指数变换,将偏态分布的旬降水量序列转换为近于正态分 布的 Z序列,通过对Z指数的划分反算而得实际降水量的划分结果。该方法既考虑其自身概率 分布 ,又避免了复杂的分布函数参数计算。将该方法的客观标准与现行标准的划分结果进行比较 分析,发现前者结果稳定,随机性小,结果更为合理。
中文关键词: 旬降水量  客观分级  正态分布  Z指数
Abstract:Based on the current standard and method to classify the ten day rainfall of Jilin Province at present, a new method, which is based on the pro bability distribution function, is presented. In view of the non normal distrib u tion of ten day rainfall, Z index transformation is employed. The index can tran sform the non normal distribution data into the normal one. The classification r esult of rainfall is based on classifying the Z index. The results of the n ew method are more stable and more rational than those of the original method.
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陈长胜,王慧敏,慕秀香,汪秀清,2007.吉林省旬降水量的客观分级方法探讨[J].气象,33(11):87-92.
Chen Changsheng,Wang Huimin,Mu Xiuxiang,Wang Xiuqing,2007.Discussion on the Objective Classification Method for Ten day Rainfall of Jilin Province[J].Meteor Mon,33(11):87-92.