近59a河南省降水重心分布特征及其与站网空间分布关系  

The distribution characteristics of precipitation barycenter and its relationship with the spatial distribution of the station network in Henan Province in recent 59 years

作　　者：凌敏华[1,2,3] 韩洪宝 吕翠美 LING Minhua;HAN Hongbao;LYU Cuimei(School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China;Yellow River Institute for Ecological Protection&Regional Coordinated Development,Zhengzhou University,Zhengzhou 450001,Henan,China;Zhengzhou Key Laboratory of Water Resource and Environment,Zhengzhou 450001,Henan,China)

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

出　　处：《水利水电技术（中英文）》2022年第1期26-34,共9页Water Resources and Hydropower Engineering

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

摘　　要：降水重心反映了区域降水总体空间分布及长期演变过程,掌握降水重心分布特征对于区域旱涝灾害防治、水资源评价与管理具有一定指导意义。基于河南省112个气象站的逐月降水资料,利用重心模型、标准差椭圆、M-K检验法、典型相关分析等方法,分析了河南省月、年际、年代际降水重心分布与转移以及站网空间分布对降水重心的影响。结果表明:1960—2018年期间,河南省月、年降水重心均分布在许昌市许昌县和漯河市临颍县一带,空间分布格局均呈西北—东南方向,离散程度较小,方向性明显;月降水重心移动轨迹总体上呈类"8"字,雨季与旱季的降水重心分别位于类"8"字上部和下部;近59 a年降水重心总体上有明显向东移动趋势,近六个年代降水重心变化不显著;站网密度与站网均匀度对降水重心均有较大影响,呈正向相关关系,站网密度对降水重心的影响比站网均匀度小。The precipitation barycenter can reflect the overall distribution and long-term evolution of precipitation in the region.Therefore,studying the change characteristics of the precipitation barycenter has guiding significance for the prevention of drought and flood disasters,water resources evaluation and management.Based on precipitation data at 112 meteorological stations in Henan Province during 1960—2018,gravity center model,standard deviation ellipse M-K test,cononical correlation analysis and other methods are used to analyze the precipitation barycenter transfer trend and the influence of the spatial distribution of station network on the precipitation barycenter in Henan Province on the scale of month,year and decade.The results indicate that:(1)From 1960 to 2018,the center of gravity of annual and monthly precipitation in Henan Province is mainly distributed in Xuchang and Luohe,and the spatial distribution pattern of the precipitation center is in the northwest-southeast direction.(2)The movement trajectory of the monthly precipitation barycenter is generally like a figure eight,with a small degree of dispersion and obvious directionality.The precipitation barycenters of rainy and dry seasons are located at the upper and lower parts of“8”respectively.The annual precipitation barycenter has an obvious eastward movement trend,while the precipitation barycenter does not change strongly between decadal.(3)The density of the station network and the uniformity of the station network has a significant effect on the distribution of the precipitation barycenter,showing a close positive correlation.The influence of weather station network density on the change of precipitation barycenter is smaller than that of weather station network uniformity.

关 键 词：重心模型 降水重心 典型相关分析 站网空间分布 河南 

分 类 号：P426.62[天文地球—大气科学及气象学]