基于小波变换的大安地区年降水量变化特征

J4 ›› 2010, Vol. 40 ›› Issue (1): 121-127.

基于小波变换的大安地区年降水量变化特征

卢文喜¹|陈社明¹|王晨子²|刘磊¹|贾洪玮¹|吕德全¹

1.吉林大学环境与资源学院|长春 130026;2.河北工业大学材料学院|天津 300130

收稿日期:2009-06-01 出版日期:2010-01-26 发布日期:2010-01-26
作者简介:卢文喜(1956-)|男|吉林德惠人|教授|博士生导师|主要从事生态水文、地下水数值模拟与优化管理等方面的研究|E-mail:Luwenxi@jlu.edu.cn
基金资助:
国家自然科学基金项目（４０６７２１５７）

Variation Characteristics of Annual Precipitation in Da’an Area Based on Wavelet Transformation

1.College of Environment and Resources| Jilin University|Changchun 130026|China;2.School of Material Sciences and Engineering|Hebei University of Technology|Tianjin 300130|China

Received:2009-06-01 Online:2010-01-26 Published:2010-01-26

摘要/Abstract

摘要：

基于小波分析的方法，对吉林省大安地区1959-2007年的年降水量序列的变化特征进行了分析。经分析表明，大安地区年降水量在其计算时域内各时间尺度分布不均匀，具有明显的局部化特征;其中4～6 a尺度主要发生在1959-1969年和1984年之后，10～12 a尺度主要发生在1965-1999年，20～25 a尺度在整个计算时域内均有发生。不同时间尺度下，降水量偏多、偏少交替变化也不相同。此外，分析结果显示该地区年降水量具有4 a、10 a和21 a左右的主周期，其中4 a周期为第一主周期。

关键词: 小波变换；大安地区；Morlet小波；多时间尺度;降水量

Abstract:

The variation characteristics of the annual precipitation in Da’an area of Jilin Province from 1959 to 2007 were discussed based on wavelet analysis method. The analysis result shows that the annual precipitation sequence of Da’an area represents a non-uniform time-scale distribution in its calculation period with a obvious local features, in which 4-6 years scale mainly occurred in the period of 1959-1969 and the year after 1984, the 10-12 years scale mainly occurred in the period of 1965-1999 and the 20-25 years scale occurred throughout the calculation period. In different time scales, the alternated change is different in the situation that the precipitation on the high side and low side. Simultaneously, the analysis shows that the sequence of precipitation of the region has a main period of 4 years, 10 years and 21 years, and the period of 4 years is the first main period.

Key words: wavelet transformation, Da’an area, Morlet wavelet, multiple time scales;precipitation

中图分类号:

P332.1

卢文喜, 陈社明, 王晨子, 刘磊, 贾洪玮, 吕德全. 基于小波变换的大安地区年降水量变化特征[J]. J4, 2010, 40(1): 121-127.

LEI Wen-xi, CHEN She-ming, WANG Chen-zi, LIU Lei, GU Hong-wei, LV De-quan. Variation Characteristics of Annual Precipitation in Da’an Area Based on Wavelet Transformation[J]. J4, 2010, 40(1): 121-127.

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