摘要
利用辽宁沈阳市1960—2017年5个国家级气象站逐月降水量资料,分析沈阳市不同时间尺度降水的时空分布特征,并采用偏度-峰度系数和S-W检验法,对沈阳市降水量的正态性分布进行检验。结果表明,除新民外,沈阳市其他地区年降水量均满足正态分布;春季降水量的正态性最好,冬季降水量基本不满足正态分布;月降水量的正态性较差,经过正态变换后的正态性均得到明显改善。沈阳市年平均降水量呈自东南向西北逐渐递减的空间分布特征,且近58 a来年降水量整体呈微弱减少趋势。
Based on the monthly precipitation at five national meteorological stations in Shenyang of Liaoning Province from1960to2017,the temporal and spatial distribution characteristics of precipitation with different time scales in Shenyang were analyzed.And the normal distribution of precipitation in Shenyang was tested by using skewness-kurtosis coefficient and S-W test method.The results show that the annual precipitation fitted normal distribution in most areas of Shenyang except for Xinmin station.The normality of spring precipitation was the best,while that of winter precipitation was worst,and the test score basically didn’t reach the normal score at each station in Shenyang.The normality of monthly precipitation in Shenyang was poor,but the normality improved obviously after the normality transformation,which would provide a scientific basis for analysis and prediction of precipitation.The annual precipitation decreased gradually from southeast to northwest in Shenyang,and it appeared a weak decreasing trend from1960to2017.
作者
吉曹翔
李崇
陈鹏心
班伟龙
白冰
宋晓巍
金宇
梁红
JI Caoxiang;LI Chong;CHEN Pengxin;BAN Weilong;BAI Bing;SONG Xiaowei;JIN Yu;LIANG Hong(Shenyang Meteorological Bureau of Liaoning Province,Shenyang 110168,China;Gansu Meteorological Information and Technic Support and Equipment Center,Lanzhou 730020,China;Shenbei Xinqu Meteorological Station of Liaoning Province,Shenyang 110135,China)
出处
《干旱气象》
2018年第6期954-962,989,共10页
Journal of Arid Meteorology
基金
沈阳市气象局2016年山洪地质灾害防治气象保障工程
沈阳市气象局研究项目"基于ArcGIS Engine的气象要素可视化的设计与实现"共同资助
关键词
沈阳
降水量
正态性分布
正态变换
Shenyang
precipitation
normal distribution
normal transformation
