水科学进展2025，Vol.36Issue(2)：230-243,14.DOI:10.14042/j.cnki.32.1309.2025.02.005
青藏高原海拔5 000m以下雪面雨时空变化
Spatiotemporal variations in rain-on-snow below an elevation of 5000 m on the Qinghai-Tibet Plateau
摘要
Abstract
Rain-on-snow(ROS)significantly impacts ecohydrological processes on the Qinghai-Tibet Plateau,and the study of the spatiotemporal variations in ROS is crucial for water resource management in the region.In this work,the spatiotemporal variations in ROS and its driving mechanism on the Qinghai-Tibet Plateau from 1978 to 2017 were systematically analysed via daily snow depth and meteorological data from 69 stations.The results showed that ROS days in the region are mainly concentrated in October and from March to May of the following year and are distributed mainly in the eastern,central and southeastern regions.High-intensity ROS(≥50 mm/d)mostly occurred in the southeastern region in March and October and in the central region and Qilian Mountain in the northeastern part of the region in April and May.Owing to the increase in the number of rainfall days,the number of ROS days decreased significantly(P＜0.01)in summer at a rate of 1.2 d/(10a)and increased slightly in spring.Moreover,influenced by the increase in the amount of rainfall,the ROS intensity decreased slightly in summer and increased significantly(P＜0.05)in spring at a rate of 6 mm/(d·10a).Continued global warming in the future could exacerbate the risk of ROS-induced flooding in the region in late winter and early spring.关键词
雪面雨日/雪面雨强度/时空变化/驱动机制/青藏高原Key words
rain-on-snow day/rain-on-snow intensity/spatiotemporal variations/driving mechanism/Qinghai-Tibet Plateau分类
大气科学引用本文复制引用
杨志伟,陈仁升,王雄师,刘章文,刘国华,冯乐涛..青藏高原海拔5 000m以下雪面雨时空变化[J].水科学进展,2025,36(2):230-243,14.基金项目
国家自然科学基金项目(42171145) （42171145）
甘肃省科技计划项目(25JRRA409) The study is financially supported by the National Natural Science Foundation of China(No.42171145)and Gansu Provincial Science and Technology Plan Project,China(No.25JRRA409). （25JRRA409）
