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Spatio-temporal characteristics of compound high temperature and drought events during critical rice growth periods in Sichuan Province based on the Copula function
PU Changlin, CHEN Dongdong, ZHANG Yufang, WANG Xiaodong, ZOU Yujia
Journal of Arid Meteorology, 2026 44 (2): 188
Under global warming, compound events of heat and drought pose a far greater threat to agricultural production than individual extremes. Based on daily precipitation and maximum temperature data from 92 meteorological stations in Sichuan Province druing 1981-2022, this study employed the Standardized Precipitation Evapotranspiration Index (SPEI) and the Standardized Temperature Index (STI) to characterize drought intensity and high temperature intensity， respectively. A joint probability distribution model of heat and drought intensities was constructed using the Copula function, and the spatiotemporal characteristics of compound heat-drought events during the critical rice growth periods (b. . .
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Identification and evolution characteristics of sub-seasonal drought-flood abrupt alternation events in Ningxia
GAO Na, WANG Suyan, LI Xin, GAO Ruina, WANG Dai
Journal of Arid Meteorology, 2026 44 (2): 199
Against the backdrop of global warming and intensifying human activities, extreme drought and flood events have shown a trend of increasing frequency and intensity. However, research on sub-seasonal drought-flood abrupt alternation events remains relatively limited. In light of this, this study utilizes daily precipitation data from 20 national meteorological observation stations in Ningxia from 1961 to 2023 and employs the multi-threshold run theory to propose a method for sub-seasonal drought-flood abrupt alternation events, which is subsequently validated. Based on this method, drought-flood abrupt alternation events in Ningxia from April to October during 1961-2023 are statistically anal. . .
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Spatio-temporal characteristics and risk zonation of high temperature damage for seed maize in the Hexi Corridor
WANG Fan, QI Yue, FANG Feng, JIA Jianying, WANG Xing, FANG Ziyun, JIA Yiyang, REN Shuyuan, ZHANG Yaxin
Journal of Arid Meteorology, 2026 44 (2): 207
Gansu Province is one of China’s three national-level seed maize breeding bases, with the Hexi Corridor being a major production area for seed maize. Under climate warming, frequent regional high temperature events seriously threaten the high and stable yield of seed maize. Therefore, heat disaster prevention for seed maize is crucial to national seed industry development and food security. Using daily and hourly temperature data from 14 meteorological stations in the main seed maize producing areas of the Hexi Corridor, Gansu Province during 2004-2025, combined with seed maize yield data, this study determined high temperature damage indicators for seed maize, analyzed the spatio-temporal d. . .
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A study on the climatic characteristics of cloud water resources in typical arid areas based on multiple datasets
LI Zhuozhuo, YANG Lianmei, Abulikemu Abuduwaili
Journal of Arid Meteorology, 2026 44 (2): 218
To reveal the spatiotemporal characteristics of cloud water resources in Xinjiang, this study systematically analyzes the variations in cloud amount and cloud water parameters (cloud water content, liquid water content, and ice water content) using satellite data from CloudSat and MODIS for 2007-2019 and reanalysis data from ERA5 for 1979-2024. The results show that all three datasets consistently capture the primary spatial pattern of cloud water parameters, characterized by higher values in mountainous areas and lower values in basins, with ice water content generally exceeding liquid water content. ERA5, with its higher spatial resolution, can more clearly represent terrain-related local . . .
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Spatiotemporal variations of hail days over the Qinghai-Xizang Plateau from 1969 to 2024
FENG Xiaoli, ZHAO Zhanxiu, WANG He, ZHANG Hongliang, ZHANG Xin, GUAN Qin, GE Yourong
Journal of Arid Meteorology, 2026 44 (2): 230
The study of hail days over the Qinghai-Xizang Plateau plays a crucial role in regional hail disaster mitigation and response strategy formulation. Based on observational data from 89 meteorological stations over the Qinghai-Xizang Plateau and ERA5 reanalysis datasets from the European Centre for Medium-Range Weather Forecasts (ECMWF) in the warm season (May-September) from 1969 to 2024, this study examined the spatiotemporal variation of hail days and the causes of the reduction of hail days using methods such as linear trend estimation, concentration degree and concentration period analysis, and correlation analysis. The results show that the number of hail days has decreased significantly. . .
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Spatio-temporal distribution characteristics of hourly heavy rainfall in central Hunan during flood season (April-September)
CAI Haichao, LIU Hongwu, CAI Jinjie, TANG Yonglan, CAI Xingfang
Journal of Arid Meteorology, 2026 44 (2): 240
To enhance the forecasting and early warning capability for short-duration heavy rainfall (HHR) and optimize disaster prevention and mitigation planning in central Hunan, based on terrain partitioning (Regions I-IV) and hourly precipitation observations, the multi-scale spatiotemporal distribution characteristics and evolution of HHR during the flood seasons (April-September) in central Hunan from 2016 to 2024 were systematically analyzed. The results show that the spatial distribution of short-duration heavy rainfall during the flood season in central Hunan exhibits significant differences. High-value areas of mean precipitation amount and frequency are mainly located in the northeastern pa. . .
