干旱区研究2024，Vol.41Issue(3)：387-398,12.DOI:10.13866/j.azr.2024.03.04
近40a内蒙古冬旱时空演变特征
Characteristics of the spatial and temporal evolution of winter drought in Inner Mongolia over the past 40 years
摘要
Abstract
Winter drought is a main factor hindering winter livestock production in Inner Mongolia.Thus,quanti-tative characterization of its spatiotemporal changes and development patterns is of great significance for disaster prevention and reduction and for ensuring the healthy development of agriculture and animal husbandry.Using ERA5-Land reanalysis meteorological data from the winter of 1980 to 2021(October to March of the following year),the standardized precipitation evapotranspiration index(SPEI)was calculated at monthly and semi-annual scales.Trend analysis,spatiotemporal hotspot analysis,and other methods were used to analyze the winter drought evolution characteristics of the entire Inner Mongolia region and the five main vegetation types.Results show that in the past 40 years,the overall SPEI in Inner Mongolia has shown an increasing trend in winter,and aridification varies among different vegetation and months,with a few vegetation and months tending toward hu-midification.The change patterns in Inner Mongolia mainly include three types:oscillating hot spots,oscillating cold spots,and undetected patterns.From a seasonal perspective,hotspots are primarily distributed in most areas of western Inner Mongolia,as well as in Xing'an League and Tongliao City in the east.On a monthly scale,hot-spots often appear in the central and western regions of Inner Mongolia.With regard to drought frequency and fre-quency statistics,mild drought events have the highest frequency,whereas winter drought events occur more fre-quently and seriously in desert grasslands and neighboring desert areas.关键词
内蒙古冬旱/时空演变/SPEI指数/新兴时空热点分析Key words
winter drought in Inner Mongolia/spatio-temporal evolution/SPEI index/emerging spatio-tempo-ral hotspot analysis引用本文复制引用
陶际峰,包玉龙,郭恩亮,金额尔德木吐,呼斯乐,包玉海..近40a内蒙古冬旱时空演变特征[J].干旱区研究,2024,41(3):387-398,12.基金项目
内蒙古自然科学基金面上项目(2021MS04016) （2021MS04016）
内蒙古自治区科技重大专项课题(2021ZD004503) （2021ZD004503）
内蒙古自治区哲学社会科学规划项目(2022NDA225) （2022NDA225）
内蒙古自治区重点研发与成果转化计划项目(2022YFSH0070) （2022YFSH0070）
