水利水电技术（中英文）2024，Vol.55Issue(6)：120-133,14.DOI:10.13928/j.cnki.wrahe.2024.06.010
吉林省气象干旱指标适用性及干旱时空演变特征研究
Applicability of meteorological drought index and spatiotemporal characteristics of drought in Jilin Province
摘要
Abstract
[Objective]Jilin Province is the main grain-producing area in China,and it is important to clarify the spatial and tem-poral characteristics of drought in the region to ensure the safety of grain production,while suitable meteorological drought indica-tors are a prerequisite for accurate identification of drought development.[Methods]This study calculates the standardized pre-cipitation index(SPI),percent precipitation distance level(PA),standardized evapotran SPIration index(SPEI)and relative wetness index(MI)3 and 12-month result,based on the monthly precipitation and temperature data of 55 meteorological stations in Jilin Province from 1960 to 2020.The seasonal scale s PAtial result of the four meteorological drought indices are com PAred with the historical drought records based on the constructed index applicability identification method.The optimum index is iden-tified quantitatively and precisely,and the interdecadal,interannual and seasonal drought evolution characteristics of the province are analyzed.[Results]The result of the study show that:(1)The four indices are monitored with the highest to lowest accuracy of SPI(71.15%),PA(66.67%),SPEI(66.03%),and MI(55.77%).(2)On an interdecadal scale,the drought-prone areas in Jilin Province before 1980 s are mainly concentrated in Jilin City and Yanbian Prefecture in the eastern region,both with drought frequencies higher than 40%;after 1980 s,the high value areas shift to Baicheng and Songyuan City in western Jilin Province,both with drought frequencies higher than 20%.(3)The annual scale,spring,autumn and winter all show significant wetting trends,with drought intensity tendency rates of-1.761%/10 a,-0.124%/10 a,-0.068%/10 a and-0.054%/10 a,respectively.[Conclusion]The SPI index is the most applicable index among the four indicators to Jilin Province,where the drought-prone areas of the province shift from the southeast to the northwest,and the central and western regions are drought-prone areas.The result of the study can provide reference for drought monitoring,agricultural production and drought defense command decision making in the province.关键词
气象干旱/干旱指标/指标适用性/干旱监测/吉林省/气候变化Key words
meteorological drought/drought indices/indicator applicability/drought monitoring/Jilin Province/climate change分类
大气科学引用本文复制引用
付平凡,杨晓静,苏志诚,李云霄,贺双燕..吉林省气象干旱指标适用性及干旱时空演变特征研究[J].水利水电技术（中英文）,2024,55(6):120-133,14.基金项目
国家重点研发计划(2023YFC3006603) （2023YFC3006603）
江西省"科技+水利"联合计划项目(2022KSG01002) （2022KSG01002）
中国水利水电科学研究院防洪抗旱减灾工程技术研究中心青年创新人才推进项目. （）
