乌梁素海流域近60年气候变化特征研究  

Analysis of Climate Change Characteristics in Wuliangsu Lake Basin in Recent 60 Years

作　　者：张保龙[1] 于亮亮[1] 赵宇新 刘艳丽[1] 丁仕青 张静[1] ZHANG Baolong;YU Liangliang;ZHAO Yuxin;LIU Yanli;DING Shiqing;ZHANG Jing(Bayannur Meteorological Bureau,Bayannur 015000,China)

机构地区：[1]内蒙古巴彦淖尔市气象局,内蒙古巴彦淖尔015000

出　　处：《宁夏工程技术》2021年第4期289-294,303,共7页Ningxia Engineering Technology

摘　　要：为了解乌梁素海流域气候变化特征和趋势,采用气候倾向率法、Mann-Kendall检验法、Morlet小波分析法、经验正交函数(EOF)分析法,对1960—2019年乌梁素海流域16个气象站的平均气温、降水量资料进行了分析研究。结果表明:该流域年平均气温由南向北逐渐降低,在20世纪60年代呈波动下降,之后稳定上升,存在准60 a长期振荡和准32 a中期振荡,主要空间分布为流域一致型;年平均降水量自东向西逐渐减少,年际变化略微上升,降水日数缓慢下降,存在准60 a长期振荡、准32 a中期振荡和10~15 a的短期振荡,主要空间分布为流域一致型,随时间变化表现出正负交叉。To understand the characteristics and trends of climate change in Wuliangsu lake basin,the average temperature and precipitation data of 16 meteorological stations there from 1960 to 2019 are analyzed and studied by using methods of the climate tendency rate,the Mann Kendall test,the Morlet wavelet analysis and the empirical orthogonal function(EOF)analysis.The results show that the average annual temperature gradually decreases from south to north;there is a fluctuant decrease in the 1960 s,and then a steady rise after that,which shows a quasi-60-year long-term oscillation and a quasi-32-year mediumterm oscillation;and the main spatial distribution is of basin consistent type.The average annual precipitation decreases gradually from east to west,with a slight increase in interannual variation;the number of precipitation days decreases slowly,with a quasi-60-year long-term oscillation,a quasi-32-year medium-term oscillation and a 10-15 years’short-term oscillation;and the main spatial distribution is of basin consistent type,showing positive and negative intersection with time.

关 键 词：乌梁素海流域 气候变化 泰森多边形法 Mann-Kendall检验法 Morlet小波分析法 EOF分析法 

分 类 号：P467[天文地球—大气科学及气象学]