水力发电学报2024，Vol.43Issue(7)：1-13,13.DOI:10.11660/slfdxb.20240701
黄河流域非平稳气象干旱特征的重构及时空演变规律
Reconstruction of non-stationary meteorological drought series and its spatiotemporal patterns in Yellow River basin
摘要
Abstract
Under the influence of climate change and high intensity human activities,it is difficult to accurately describe the evolution of non-stationary drought series under the traditional stationary hypothesis.This study uses the complete ensemble empirical mode decomposition with adaptive noise and the run theory to extract the reconstructed drought characteristics of the standardized precipitation evapotranspiration index(SPEI),based on monthly meteorological data from the Yellow River basin of 1960-2020.And the Pettitt method and rotating empirical orthogonal functions are combined to examine its non-stationary meteorological drought characteristics.Results indicate that its meteorological drought manifested a significant increasing trend on multiple time scales,and significant changes in SPEI occurred around 1996 on all time scales.More pronounced seasonal variations in time and more realistic distributions in space are found in the reconstructed drought characteristics when taking into account the non-stationarity.This study is of great significance in clarifying the spatiotemporal evolution patterns of meteorological drought under non-stationary conditions,and helps drought prevention and mitigation for the Yellow River basin.关键词
黄河流域/气象干旱/标准化降水蒸散指数/重构干旱特征Key words
Yellow River basin/meteorological drought/standardized precipitation evapotranspiration index/reconstructed drought characteristics分类
水利科学引用本文复制引用
陈仕豪,门宝辉,庞金凤,张腾,王红瑞..黄河流域非平稳气象干旱特征的重构及时空演变规律[J].水力发电学报,2024,43(7):1-13,13.基金项目
国家自然科学基金(52279005) （52279005）
国家自然科学基金国际(地区)合作与交流项目(52061135104) （地区）
