摘要
利用Morlet小波和db N小波分析吉林市内4个雨量站55年降水量不同时间尺度的周期规律及变化趋势。研究结果表明,吉林市年降水量整体上存在2~6年的短周期和22~25年的长周期,在10~13年处还存在小型波动。在长时间尺度上,吉林市年降水量整体上将呈现近期逐渐增加至最大值,后逐渐减少的趋势。
This paper uses Morelet wavelet and dbN wavelet to analyze the precipitation cycles in multi-time scales and variation trends according to the precipitation data of 55 years of 4 precipitation stations in Jilin City. The study results show that the precipitation of Jilin City has 2 to 6 years of short cycle and 22 to 25 years long period; there are small fluctuations in 10 to13 years; on long time scale, the annual precipitation of Jilin City presents the trend of gradually increasing recently to a maximum, and then gradually decreasing.
作者
孙思宇
梁秀娟
肖长来
王添
李宝玉
SUN Si-yu LIANG Xiu-juan XIAO Chang-lai WANG Tian LI Bao-yu(Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China)
出处
《节水灌溉》
北大核心
2017年第10期56-60,共5页
Water Saving Irrigation
基金
国家自然科学基金(41572216)
吉林省自然科学基金项目(20140101164JC)
关键词
小波分析
降水周期
降水趋势
吉林市
wavelet analysis
precipitation cycle
precipitation trend
Jilin City
