基于小波变换的三门峡市年降水序列多时间尺度分析  

Multi-time Scale Analysis of Sanmenxia Annual Precipitation Series Based on Wavelet Transform

作　　者：戴翠贤 贾斯 王君 李晓琳[1] DAI Cuixian;JIA Si;WANG Jun;LI Xiaolin(Sanmenxia Meteorological Bureau,Sanmenxia 472000,Henan China;Changyuan Meteorological Bureau,Changyuan 453400,Henan China;Henan Provincial Meteorological Society,Zhengzhou 450003,China;CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique,Zhengzhou 450003,China;Henan Institute of Meteorological Sciences,Zhengzhou 450003,China)

机构地区：[1]三门峡市气象局,河南三门峡472000 [2]长垣市气象局,河南长垣453400 [3]河南省气象学会,郑州450003 [4]中国气象局河南省农业气象保障与应用技术重点开放实验室,郑州450003 [5]河南省气象科学研究所,郑州450003

出　　处：《河南科学》2022年第2期270-275,共6页Henan Science

基　　金：河南省科技攻关计划项目(112102310033)。

摘　　要：利用1960—2020年三门峡市逐日降水观测资料,首先采用线性倾向估计分析,之后采用Morlet小波分析方法,最后采用Mann-Kendall突变检验,对三门峡市年际降水变化的时间序列进行分析,以揭示三门峡市降水的多时间尺度周期性变化规律.结果表明:三门峡市降水量整体呈不明显缓慢变少的趋势,气候倾向率为-0.35 mm/10 a;多雨18 a,少雨20 a;在不同的时间尺度下,三门峡市降水序列具有6、9、16 a的周期振荡变化,16 a周期振荡最强,为第一主周期,并主导着年降水变化的特性.年降水量存在1960—1961年、1972—1973年两个突变点.Based on the daily precipitation observation data from 1960 to 2020 in Sanmenxia,the linear trend estimation,wavelet analysis and Mann-Kendall mutation test are used to analyze the characteristics of precipitation change in Sanmenxia,in order to reveal the time-scale periodic change rule of precipitation.The results show that there is a slowly decreasing overall trend of precipitation in Sanmenxia,the climate trend rate is-0.35 mm/10 years.There are 18 rainy years and 20 less rainfall years.In different time scales,the Sanmenxia precipitation series has periodic oscillation variation of 6 a,9 a and 16 a,and the strongest oscillation period is about 16 a,which is the first main period,and dominating the characteristics of annual precipitation.There were two abrupt points of annual precipitation of 1972-1973 and 1960-1961.

关 键 词：降水 线性倾向估计 小波变化 时间尺度 周期 Mann-Kendall突变检验 

分 类 号：P467[天文地球—大气科学及气象学]