干旱区地理2026，Vol.49Issue(6)：1147-1156,10.DOI:10.12118/j.issn.1000-6060.2025.416
河西走廊东部春季复合低温多雨事件的识别及其变化特征
Identification and change characteristics of compound low temperature and rainfall events of spring in the eastern Hexi Corridor
摘要
Abstract
Compound low-temperature and rainfall(CTLR)events are among the complex,high-incidence cli-mate extremes occurring in the eastern Hexi Corridor.They are important climate indicators and meteorological disasters that cause more severe damage to agricultural production and the ecological environment than single ex-treme climate events.Based on daily minimum temperature and precipitation data from five meteorological sta-tions(spring of 1960-2024)in the eastern Hexi Corridor,CTLR events were identified and characterized via the percentile threshold method and the principle of maximum proximity.Spatiotemporal characteristics of CTLR events were subsequently analyzed using the inverse distance weighting interpolation and linear trend methods.The results show the following:(1)Springtime and March-May CTLR events in the region assumed distribution characteristics of more in the south,less in the north,ranked by frequency as Gulang>Tianzhu>Liangzhou>Yongchang>Minqin.High-frequency areas were clustered in the Gulang shallow mountainous area,whereas the Minqin desert area served as the low-frequency area.(2)Spring,as well as March and April CTLR events showed decadal and annual decreases,whereas May showed a nonmonotonic trend,increasing first before de-creasing.Peak CTLR frequency years(spring and monthly)varied across regional and local scales,and CTLR ab-sences were recorded in individual years.This provides an important scientific basis and practical reference for agricultural production and ecological security.关键词
识别/变化特征/复合低温多雨事件/百分位数阈值法/河西走廊Key words
identification/change characteristics/compound low temperature and rainfall events/percentile threshold method/Hexi Corridor引用本文复制引用
杨晓玲,赵慧华,侍峥嵘,周华,丁文魁,陈静..河西走廊东部春季复合低温多雨事件的识别及其变化特征[J].干旱区地理,2026,49(6):1147-1156,10.基金项目
武威市市列科研项目(WW25Z01NY009,2024WW01237) （WW25Z01NY009,2024WW01237）
甘肃省气象局气象科研项目(Zd2024-D-3) （Zd2024-D-3）
国家自然科学基金项目(42375039,42175192)资助 （42375039,42175192）
