基于Pa和SPI指数的昆明市气象干旱分析  

Analysis of Meteorological Drought in Kunming Based on Pa and SPI Indexes

作　　者：陈晨 张刘东 李京东 赵杨 廖悦 CHEN Chen;ZHANG Liu-dong;LI Jing-dong;ZHAO Yang;LIAO Yue(College of Water Conservancy,Yunnan Agricultural University,Kunming 650201,China)

机构地区：[1]云南农业大学水利学院,云南昆明650201

出　　处：《江西农业学报》2021年第6期78-84,共7页Acta Agriculturae Jiangxi

基　　金：国家自然科学基金项目(51669035);云南省教育厅项目(2020Y187);云南农业大学学生科技创新创业行动基金项目(2021ZKY319)。

摘　　要：收集昆明地区1980~2017年的降雨资料将数据划分为季尺度和年尺度,计算昆明市38年的Pa指数和SPI指数,分析了云南省昆明市的气象干旱特征,通过Pettitt突变检验法进行分析。结果表明:近38年以来,昆明市整体气候以正常的情况居多,干旱的情况较少;近20年来,干旱年份的比例有所增加而湿润情况有所减少,Pa指数和SPI指数变化的趋势基本一致。通过Pettitt突变检验法可知,近38年中,昆明市的Pa指数和SPI指数都没有发生显著性的突变。The rainfall data of Kunming from 1980 to 2017 were collected,and the data were divided into seasonal scale and annual scale.The PA index and SPI index of Kunming City in 38 years were calculated.The meteorological drought characteristics of Kunming City in Yunnan Province were analyzed by Pettitt mutation test method.The results show that in the past 38 years,Kunming’s overall climate is mostly normal,and the drought situation is less.In the past 20 years,the proportion of drought years has increased,and the humidity has decreased.The change trend of PA index and SPI index is basically the same.According to Pettitt mutation test,there is no significant mutation in PA index and SPI index of Kunming in recent 38 years.

关 键 词：气象干旱 Pa指数 SPI指数 Pettitt突变检验 

分 类 号：S423[农业科学—植物保护]