摘要
本文采用内蒙古自治区乌兰察布市1959—2018年降水观测数据,利用Morlet小波分析、Mann-Kendall检验和相关系数等多种统计诊断方法,分析了近60年来乌兰察布市年降水量、年降水日数等气候要素的年际、年代际、四季变化趋势、周期和空间分布特征,得到结论如下:(1)近60年来乌兰察布市降水量呈现减少趋势,且存在明显的年代际变化,其气候倾向率约为6.0 mm·(10a)^(-1);(2)春季和秋季降水量整体呈现出缓慢增加的趋势,冬季和夏季则为减少趋势,而冬季减少的趋势较缓慢;(3)年降水量表现出由南向北逐渐递减的空间分布特点,且存在29 a、17 a、4 a和7 a的振荡周期。
Based on the precipitation observation data of Ulanqab City in Inner Mongolia Autonomous Region from 1959~2018,and using various statistical diagnostic methods such as Morlet wavelet analysis,Mann-Kendall test and correlation coefficient,the inter-annual,inter-decadal and four-season variation trends,cycles and spatial distribution characteristics of climatic factors such as annual precipitation and annual precipitation days in Ulanqab City in the past 60 years were analyzed,and the conclusions were as follows:①The precipitation in Ulanqab City showed a decreasing trend in the past 60 years,There is an obvious interdecadal variation,and its climatic tendency rate is about 6.0 mm·(10a)^(-1).②The precipitation in spring and autumn showed a slow increasing trend,while the precipitation decreased in winter and summer,and decreased slowly in winter.③The annual precipitation shows a gradual decrease from south to north,and there are oscillation periods of 29 a,17 a,4 a and 7 a.
作者
郭宏力
GUO Hongli(Siziwangqi Meteorological Bureau Inner Mongolia,Siziwangqi Inner Mongolia 011800,China)
出处
《绿洲农业科学与工程》
2025年第3期62-68,共7页
Oasis Agriculture Science and Engineering
基金
2023年乌兰察布市科技创新项目—气象条件对四子王旗草原牧草生长影响的研究(20230908)。
