集合经验模态分解在陕西降水多尺度分析中的应用  

Multiscale analysis of precipitation in Shaanxi province based on ensemble empirical mode decomposition

作　　者：唐洁[1] 刘晓琴[2] 傅明星[1] TANG Jie;LIU Xiao-qin;FU Ming-xing(School of Physics and Telecommunication Engineering,Shaanxi University of Technology,Hanzhong 723000,China;Department of Pharmaceutical and Medical Technology,Hanzhong Vocational and Technical College,Hanzhong 723002,China)

机构地区：[1]陕西理工大学物理与电信工程学院,陕西汉中723000 [2]汉中职业技术学院药学与医学技术系,陕西汉中723002

出　　处：《陕西理工大学学报（自然科学版）》2018年第1期87-92,共6页Journal of Shaanxi University of Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(11373008);陕西省自然科学基金资助项目(2016JM1028);陕西省教育厅科研计划项目(14JK1157)

摘　　要：根据1960—2009年陕西省陕北、关中、陕南3个地区的年降水量资料,利用集合经验模态分解方法进行了降水量变化的多时间尺度分析,探讨了影响陕西省3个区域降水量变化的因素。结果表明,在整个时间跨度,陕南地区"先升后降"的长趋势变化不同于陕北、关中地区保持递减的长趋势变化。尽管陕西省3个区域主要周期大小有一定的差别,但是都存在着10.5年左右的年代际周期,这个年代际周期与太阳黑子相对数11年的周期大致相同,说明了陕西省3个区域的降水可能受太阳黑子活动的影响。Using the annual precipitation in northern,middle and southern Shaanxi from 1960 to 2009,the multiscale characteristics are researched based on the ensemble empirical mode decomposition,and the influencing factors of precipitation change of shaanxi province are discussed.Results indicate that the precipitation in northern and middle part of Shaanxi decreases slightly,but the precipitation in southern part increases at first and then decreases.Although there exists a different average period in three areas of Shaanxi Province,there is an average period of 10.5 years.Because both the precipitation of Shaanxi Province and the sunspots have about 11 years cycle.The conclusion indicates the precipitation of Shaanxi Province is influenced by the sunspot activity.

关 键 词：集合经验模态分解 陕西降水 多尺度 周期 

分 类 号：P341[天文地球—水文科学]