干旱区研究2026，Vol.43Issue(9)：1791-1804,14.DOI:10.13866/j.azr.2026.09.01
基于三维识别的中国西北气象干旱动态演变
Dynamic evolution of meteorological drought in Northwest China based on three-dimensional identification
摘要
Abstract
Northwest China,one of the driest regions at its latitude globally,faces severe water security threats due to persistent drought.Understanding the spatiotemporal evolution of meteorological drought is critical for im-proving monitoring and management.Using the standardized precipitation evapotranspiration index,this study constructed a three-dimensional identification model to detect drought events from 1980 to 2019,and analyzed their evolutionary characteristics and regional disparities.Results indicate that over the past 40 years,drought ar-ea,severity,and duration increased significantly in eastern Northwest China,while maximum extent decreased,suggesting a shift from large-scale contiguous droughts to smaller,high-intensity events.Drought centroids in the east migrated northward and eastward,whereas western centroids remained stable.Seasonal heterogeneity was evident:Eastern drought severity was distributed across all seasons,with slightly higher intensity in spring and autumn;in the west,spring drought dominated overall severity.Drought migration paths showed clear regional differences,with westward movement prevailing in both areas,forming an alternating east-west axial pattern.Analysis of representative events revealed distinct migration modes and clarified drought propagation characteris-tics.These findings offer a scientific basis for enhancing early warning systems and targeted drought prevention strategies in Northwest China.关键词
三维干旱识别/气象干旱/干旱演变/干旱事件特征Key words
three-dimensional drought identification/meteorological drought/drought migration/drought event characteristics引用本文复制引用
强泽楷,李建华,马海涛,侯嘉烨,何杰..基于三维识别的中国西北气象干旱动态演变[J].干旱区研究,2026,43(9):1791-1804,14.基金项目
国家自然科学基金项目(42061062) （42061062）
宁夏自然科学基金项目(2024AAC03079) （2024AAC03079）
