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Spatial distribution and intensity variation characteristics of land-atmosphere coupling in the Northern Hemisphere over the past 70 years
WANG Chenghai, SHANG Junxiang, ZHANG Feimin, YANG Kai
Journal of Arid Meteorology, 2025 43 (3): 354
Land-atmosphere coupling is a crucial link in the exchange of mass and energy between the land surface and the atmosphere. Water vapor from soil evaporation condenses and releases latent heat during rising and cooling processes, which warms the boundary layer air and reduces atmospheric boundary layer stability, thereby promoting the initiation and development of convection, and can potentially lead to precipitation formation. An in-depth study of the spatio-temporal variation characteristics of land-atmosphere coupling is of great significance for understanding its role in global climate change. Based on the soil moisture data from the Global Land Data Assimilation System (GLDAS), the land . . .
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Analysis on differences of characteristics and atmospheric circulation causes of meteorological drought during summer in Sichuan-Chongqing region
HE Huigen, ZHANG Chi, CHENG Qingyan, LI Yonghua, GAN Weiwei, JIN Yan
Journal of Arid Meteorology, 2025 43 (3): 365
To reveal the spatio-temporal differences and atmospheric circulation causes of summer meteorological drought in the Sichuan-Chongqing region, based on daily observational data and meteorological drought composite index (MCI) of 188 meteorological stations in Sichuan and Chongqing during 1981-2023, the spatio-temporal evolution characteristics of summer drought in Sichuan and Chongqing are analyzed. In addition, monthly reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) and climate system monitoring indices are employed to investigate the drought formation mechanisms from the perspectives of circulation patterns, water . . .
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Homogeneity test of extreme temperature in Xinjiang and analysis of its temporal and spatial characteristics
LIU Weiping, CAO Lijuan, ZHANG Pu, LI Zhen, YUAN Fang, FEI Ye, WANG Qiwen, LI Qinglei
Journal of Arid Meteorology, 2025 43 (3): 402
Under the background of global warming, Xinjiang has frequently experienced extreme weather and climate events. An in-depth study on the homogenization of extreme temperature will help to accurately analyze climate change characteristics and provide a basis for formulating effective climate change response strategies. Utilizing the Penalized Maximum T Test (PMT) method included in the RHtestsV5 software package, the paper selected homogenized monthly average maximum and minimum temperatures as reference sequences to conduct homogeneity tests on monthly extreme maximum and minimum temperature series from 1951 to 2022 at 105 national surface meteorological stations in Xinjiang. This analysis a. . .
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Impact of urbanization on the climate environment in Xi’an over the past 60 years
SHEN Jiaojiao, HAO Sujuan, JIN Lina, ZHANG Yabin, FAN Dandan, GUO Qi
Journal of Arid Meteorology, 2025 43 (3): 412
Study of the influence of urbanization on the climate environment can provide a basis for urban adaptation to climate change. Based on the data of meteorological stations in urban and suburban areas of Xi’an from 1961 to 2022, the impacts of urbanization in different stages on local climate were analyzed by comparison between urban and suburban areas, linear tendency estimation and Mann-Kendall (M-K) test. The results show that the urban heat island (UHI) effect in Xi’an has been significantly enhanced since the 1990s, and it was stronger in winter and spring. The UHI exhibits distinct diurnal and seasonal variations. The relatively stable high-value and low-value periods occur from 21:00 on. . .
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Diagnostic analysis of trigger and maintenance mechanism associated with a rainstorm over Liaodong Peninsula
LIANG Jun, JIA Xuxuan, ZHANG Shengjun, FENG Chengcheng, LI Tingting, CHENG Hang, LIU Xiaochu
Journal of Arid Meteorology, 2025 43 (3): 449
The heavy precipitation occurred in the northeastern region of Liaodong Peninsula from 20:00 on 3 to 14:00 on 5 August 2017, with the daily rainfall breaking historical records. Based on observations from automatic weather stations, radiosonde and Doppler weather radars, FY-2G temperature of brightness blackbody product, and European Centre for Medium-Range Weather Forecasts ERA5 reanalysis data, diagnostic analyses are made on the torrential rain processes in Liaodong Peninsula during 3-5 August 2017. The synoptic background, mesoscale environment and triggering mechanism of the mesoscale convective systems (MCSs) are focused. The results show there were two stages of this extreme rainstorm. . .
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Comparative analysis of two extreme rain to snowstorm processes in Liaoning
XU Qingzhe, XU Shuang, JIN Wei, TIAN Lu, GAO Qingyuan, TAN Zhenghua, SUN Anni
Journal of Arid Meteorology, 2025 43 (3): 459
It is of great significance to study the formation mechanisms of extreme rain-to-snow weathers under the background of explosive cyclones for improving winter precipitation forecasting and snow disaster prevention. Based on conventional meteorological observation data and ERA5 reanalysis data, this paper compares and analyzes the causes and characteristics of two extreme rain-to-snowstorm processes in Liaoning Province from November 6 to 9, 2021 (Process I), and from November 5 to 7, 2023 (Process II), from the perspectives of influencing systems, water vapor conditions, dynamic mechanisms, and thermal effects. The results show that the combined influence of an upper-level cold vortex and a . . .
