-
Synergistic impacts of Eurasian wave train mode and tropical convection on the compound hot and drought event in the Yangtze River Basin in late summer and early autumn in 2024
SHEN Shijian, LI Jinjian, MA Hedi, LI Xing, MENG Qingyi, LI Xiaoyu
Journal of Arid Meteorology, 2026 44 (1): 14
Compound hot and dry events can pose significant threats to agricultural production, water-resource security, and socioeconomic development. Using multisource reanalysis datasets in combination with a three-dimensional connected component (CC3D) algorithm and the daily standardized precipitation index (SPI), this paper identified and investigated a large-scale compound hot and dry event that occurred over the Yangtze River Basin during the summer-autumn of 2024, with emphasis on its spatiotemporal characteristics and driving mechanisms. The event persisted for 65 days and affected nearly the entire basin, with a heat intensity of 2.1 °C and a drought intensity of -0.64. It exhibited a clear . . .
-
Assessment of applicability of a refined drought index based on ERA5 precipitation data for the middle and upper reaches of the Yellow River
YIN Zhe, YAN Pengcheng, ZUO Dongdong, LI Shuping
Journal of Arid Meteorology, 2026 44 (1): 27
Conventional standardized precipitation index (SPI) datasets generally suffer from low temporal resolution, which limits their capability to support fine-scale monitoring of drought evolution. To address this issue, this study constructs a daily SPI dataset for China based on ERA5 reanalysis precipitation data (SPID-ERA5). Taking the middle and upper reaches of the Yellow River as the study area, two typical drought years, 1997 and 2001, are selected, and the applicability of SPID-ERA5 is evaluated using station-based monthly SPI and the daily meteorological composite index (MCI). The results show that SPID-ERA5 can clearly depict the onset, development, expansion, and weakening processes of. . .
-
Influence of the MJO and sea surface temperature anomalies on spring drought in 2019 in Yunnan
LUO Dongli, ZHAO Erxu, WAN Yunxia
Journal of Arid Meteorology, 2026 44 (1): 36
In the spring of 2019, Yunnan experienced a severe seasonal drought characterized by its extensive impact area and high intensity, which significantly affected agricultural production and water resources. By utilizing precipitation data from 125 meteorological stations in Yunnan, reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR), and high-resolution sea surface temperature data from the National Oceanic and Atmospheric Administration (NOAA), and employing statistical analysis methods such as correlation and synthesis analysis, this study analyzed the causes of the spring drought in Yunnan from the perspective of tropic. . .
-
Analysis of summer drought-flood alternation characteristics in Hubei Province from 1960 to 2024
ZHANG Rong, HUANG Zhiyong, TANG Xingzhi, WANG Wenyu
Journal of Arid Meteorology, 2026 44 (1): 46
The alternation between drought and flood is more destructive than a single drought or flood disaster. Studying its evolution patterns and prediction methods is of great significance for enhancing disaster prevention and mitigation capabilities. Based on monthly precipitation data from 70 national meteorological stations in Hubei Province from 1960 to 2024, and the fifth-generation reanalysis data from the European Centre for Medium-Range Weather Forecasts, this study analyzes the temporal evolution characteristics of the Long-cycle Drought-Flood Abrupt Alternation Index (LDFAI) in typical years of summer drought-flood alternation (drought-to-flood and flood-to-drought) in Hubei Province, an. . .
-
Drought characteristics in western Guangdong over the past 50 years based on SPEI
LI Jialiang, PENG Liying, LIU Zuren, YU Shaorong, LIANG Jiajie
Journal of Arid Meteorology, 2026 44 (1): 55
Investigating the spatiotemporal characteristics of drought in western Guangdong and their correlation mechanisms with circulation indices is of great significance for regional disaster early warning and agricultural meteorological services. Meteorological data from 13 stations in western Guangdong during 1973-2022 and atmospheric circulation indices were used to calculate the multi-scale standardized precipitation evapotranspiration index (SPEI). Trend analysis, correlation analysis, and cross wavelet transform were applied to analyze the spatiotemporal drought characteristics and their correlations with circulation indices in western Guangdong over the past 50 years. The results showed tha. . .
-
Variation characteristics and future projection of evapotranspiration across the Yellow River Basin based on CMIP6 models
YANG Yang, WANG Lijuan, WANG Rong, MA Teng, HAN Hui
Journal of Arid Meteorology, 2026 44 (1): 83
Evapotranspiration acts as an intermediate link in the terrestrial water and energy cycles while also serving as a crucial nexus connecting soil, vegetation, and atmospheric processes. Investigating changes in evapotranspiration holds significant scientific importance for the scientific management of water resources, addressing challenges posed by climate change, and ensuring regional eco-hydrological security. This study utilizes observational data from representative sites in the Yellow River Basin, namely the source region, the Hetao region, and the downstream region, which correspond to Haibei Station, the Semi-Arid Climate and Environment Observatory of Lanzhou University, and Yucheng S. . .
