1960—2018年河南省降水时空变化特征及重心  

Precipitation Variation Characteristics and Barycenter in Henan Province during 1960-2018

作　　者：凌敏华[1,2,3] 韩洪宝 LING Min-hua;HAN Hong-bao(School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China;Yellow River Institute for Ecological Protection & Regional Coordinated Development, Zhengzhou University, Zhengzhou 450001, China;Zhengzhou Key Laboratory of Water Resource and Environment, Zhengzhou 450001, China)

机构地区：[1]郑州大学水利科学与工程学院,郑州450001 [2]郑州大学黄河生态保护与区域协调发展研究院,郑州450001 [3]郑州市水资源与水环境重点实验室,郑州450001

出　　处：《科学技术与工程》2021年第17期7008-7016,共9页Science Technology and Engineering

基　　金：国家自然科学基金(52079125);河南省自然科学基金(182300410139);郑州大学青年教师基础研究培育基金(JC202042036)。

摘　　要：河南省是中国粮食生产核心区,研究其降水时空变化特征对于防治旱涝灾害、保障粮食生产具有指导意义。基于河南省112个气象站1960—2018年降水量资料,利用Mann-Kendall法、滑动T检验、小波分析等方法对河南省站点及分区降水变化趋势、突变点和周期性进行了分析,并利用重心模型、标准差椭圆等方法分析了河南省降水重心分布特征。结果表明:1960—2018年期间,河南省的112个站点中,67.9%站点降水量呈下降趋势,32.1%呈上升趋势,全省各站点气候倾向率主要位于-28~24 mm/10 a;河南省5个分区年降水量中,仅豫东地区年降水量呈上升趋势,各分区存在不同时间尺度的变化周期,在整个研究时域内经历了2.5次左右丰-枯交替循环变化;河南省降水重心分布在许昌市许昌县和漯河市临颍县一带,近59 a降水重心有明显向东移动趋势。As the core area of grain production in China,Henan Province has a scientific guiding significance to study the spatial and temporal evolution of precipitation in order to prevent droughts and floods and promote food production.Based on precipitation data at 112 meteorological stations in Henan Province from 1960 to 2018,the Mann-Kendall method,sliding T test and Morlet wavelet analysis were used to analyze the change trend,abrupt point,and periodicity of precipitation in a single station and region in Henan Province.The center of gravity model,standard deviation ellipse and other methods were used to analyze the distribution characteristics of the precipitation barycenter in Henan Province.The results show that 67.9%of the 112 meteorological stations show a downward trend and others show an upward trend from 1960 to 2018 in Henan Province.The climate tendency rate of each station is mainly in the range of-28~24 mm/10 a.Among the five regions of Henan Province,the annual precipitation in Eastern Henan alone appears an upward trend as a whole.There are different time-scale change cycles in various regions of Henan Province,which experienced about 2.5 cycles of too much-too little alternating cycles in the entire research time domain.The precipitation barycenters are mainly distributed in Xuchang County of Xuchang City and Linying County of Luohe City,and have a tendency to move eastward.

关 键 词：MANN-KENDALL法 小波分析 降水重心 河南省 

分 类 号：P426.62[天文地球—大气科学及气象学]