-
Spatiotemporal characteristics and comparison of global multi-type droughts under climate warming
WANG Yinqi, ZHANG Yanting, CHEN Hui, ZENG Zhanran
Journal of Arid Meteorology, 2026 44 (4): 539
Understanding the spatiotemporal evolution of multi-type drought and its responses to temperature and precipitation is crucial for drought risk assessment and water resources management under a warming climate. This study is based on global multi-source observational and reanalysis datasets covering the period 1982 to 2022. The Self-Calibrating Palmer Drought Severity Index (scPDSI), Standardized Soil Moisture Index (SSMI), Standardized Runoff Index (SRI) and Standardized Vegetation Health Index (SVHI) are constructed to characterize meteorological, agricultural, hydrological, and ecological droughts, respectively. Using linear trend analysis and multiple regression methods, this study inves. . .
-
Drought evolution characteristics and driving factors on the Loess Plateau based on daily SPEI-30
LIU Wangwang, LIU Dan, ZHANG Jintong, LI Shuping, SHI Lijie
Journal of Arid Meteorology, 2026 44 (4): 553
Drought is one of the most prominent natural disasters in the Loess Plateau. Its spatiotemporal evolution has direct effects on the stability of regional ecosystems, the security of agricultural production, and the high-quality development in the Yellow River Basin. Based on the daily observed meteorological data of 218 stations from 1961 to 2020, the reference crop evapotranspiration (ET0) was firstly calculated with the Penman-Monteith formula. Then, the daily water balance sequence was calculated based on daily precipitation and ET0. Lastly, this study calculated the 30-day sliding cumulative daily standardized precipitation evaporation index (SPEI-30). Based on SPEI-30, this study invest. . .
-
Spatiotemporal evolution characteristics of drought in southwest China from 2001 to 2022 and its impact on vegetation
ZHANG Hui, LI Zhouxin, LYU Jing, JIANG Shangxiong, CHEN Bo
Journal of Arid Meteorology, 2026 44 (4): 566
Drought is one of the major natural hazards worldwide, severely impacting ecosystems and agricultural production. The southwestern region of China has complex terrain and variable climate, and drought poses an especially significant threat to the vegetation ecosystem. This study characterized drought processes using multi-scale Standardized Precipitation Evapotranspiration Index (SPEI) and monitored vegetation growth with Kernel Normalized Difference Vegetation Index (kNDVI) and Enhanced Vegetation Index (EVI) derived from MODIS imagery. The kNDVI, based on kernel methods, effectively mitigates the saturation problem of traditional Normalized Difference Vegetation Index (NDVI) in high-cover . . .
-
Analysis of extreme high-temperature and drought events in the southern Sichuan Basin in midsummer 2022
YUAN Lixin, WANG Lingling, LYU Yongyang, YU Yongfu, GUO Xiang, ZHAO Jinpeng, WANG Rulin, LUO Wei
Journal of Arid Meteorology, 2026 44 (4): 579
In midsummer 2022, the southern Sichuan Basin (hereinafter referred to as Southern Sichuan) experienced the most severe high-temperature and drought event since meteorological records began in 1961, causing serious impacts on local agricultural production, particularly the ratooning rice industry. To reveal the regional characteristics of this extreme high-temperature and drought event and its potential impacts on ratooning rice production, this study analyzed the spatiotemporal evolution characteristics and extremity of high temperatures in midsummer 2022 based on data from 22 national meteorological observation stations in Southern Sichuan, evaluated the spatiotemporal dynamic changes of d. . .
-
Spatial-temporal differentiation characteristics of drought in the Hexi Corridor and surrounding regions
LIU Xiaoying, YANG Xiumei, ZHANG Junxia, GUI Qiang, ZHENG Qiong, ZHANG Junpeng
Journal of Arid Meteorology, 2026 44 (4): 591
Clarifying the spatial-temporal differentiation of drought in the Hexi Corridor and its surrounding regions can provide a scientific support basis for regional drought prevention and disaster reduction, sustainable management of oasis agriculture, and the maintenance of ecological security barriers. In this study, the Hexi Corridor and its surrounding areas were divided into three sub-regions: the northwestern Hexi region, the eastern Hexi region, and the Qilian Mountains. Monthly observation data from 17 meteorological stations during 1961-2020 were used. The Standardized Precipitation-Evapotranspiration Index (SPEI) was adopted as the drought indicator. Methods including the Mann-Kendall m. . .
-
Projection of evapotranspiration trend characteristics in the arid-prone belt of northern China
LI Danhua, ZHANG Qiang, ZHANG Tiejun, YANG Jinhu, LIU Ziyan, LIU Qing, YANG Jingyi, HUANG Yuhan, LIU Liwei
Journal of Arid Meteorology, 2026 44 (4): 612
As a key component of the water cycle, evapotranspiration (ET) not only directly affects soil moisture, river runoff, and groundwater recharge, but also plays an important role in the formation and evolution of droughts. Against the background of global warming, accurately projecting ET changes is of great significance for understanding the mechanisms of regional drought occurrence and enhancing drought resilience. Based on ET, mean temperature, and precipitation data from multiple models of the Coupled Model Intercomparison Project Phase 6 (CMIP6), this study projects the variation trends of ET and its influencing factors in the arid-prone belt of northern China under three future emission . . .
