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Characteristic and cause analysis of terrestrial water storage change in drylands of northern China
AN Linli, HUANG Jianping, REN Yu, ZHANG Guolong
Journal of Arid Meteorology, 2022 40 (2): 178
Based on GRACE (Gravity Recovery and Climate Experiment) satellite products, the TWS changes were calculated in drylands of northern China during the past two decades. And on this basis, the characteristics and causes of TWS changes were explored by using multisource observations and model simulations. The results show that TWS in drylands of northern China decreased with a rate of 17.80±1.72 Gt per year during 2002-2020, which was also accompanied by various degrees of reduction in groundwater, root zone soil moisture and surface soil moisture. In drylands of northern China, the effects, such as climate warming and human water consumption, caused a substantial increase of evapotranspiratio. . .
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Climatic anomalous features and major meteorological disasters in China in summer of 2021
TANG Yi, CAI Wenyue, ZHAI Jianqing, WANG Suping, LIU Yuan, CHEN Yixiao, GAO Ge, WANG Guofu
Journal of Arid Meteorology, 2022 40 (2): 186
According to “the Regulations on Monitoring and Evaluation of Regional Important Processes” issued by China Meteorological Administration in 2019, the basic situations of China’s climate and main meteorological disasters in summer 2021 are comprehensively analyzed based on the meteorological observation data of more than 2400 ground stations in China from 1961 to 2021. The results are as follows: (1) In the summer of 2021, both the average temperature and the average precipitation were higher than that in the same period of the previous years. The rainy season in the north started earlier with enhanced intensity, while it delayed in the south with weakened intensity. These two factors, toget. . .
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Influence of Arctic Oscillation on winter temperature in Xinjiang under climate warming background
CHEN Ying, JIAZILA Baishan, SHAO Weiling, LIU Jing
Journal of Arid Meteorology, 2022 40 (2): 201
Based on winter mean temperature observation data in Xinjiang and Arctic Oscillation (AO) index and atmospheric circulation data, the relation and variation between mean temperature in Xinjiang and AO in winter were studied, the conceptual model of winter mean temperature prediction in Xinjiang due to AO influence under the climate warming background was established. The results show that in the process of climate warming, the relation between mean temperature in Xinjiang and AO in winter not only came from global warming, but also depended on AO change in the same period. Overall, the positive (negative) anomaly of temperature in Xinjiang in winter corresponded to AO positive (negative) ano. . .
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Relationship between extremely low temperature in spring in Shandong Province and North Atlantic SST in preceding winter
XU Weiping, MENG Xiangxin, GU Weizong, BO Zhongkai
Journal of Arid Meteorology, 2022 40 (2): 211
Based on daily temperature data from 122 national meteorological stations in Shandong Province from 1961 to 2018, three extreme low temperature indices were calculated, and it was found that the occurrence frequency of extremely low temperature events defined by the scale of drop in daily minimum temperature in 24 hours could better reflect the characteristics of extremely low temperature in spring in Shandong. And on this basis, ERA-Interim monthly reanalysis data and Hadley sea surface temperature data were used to analyze the spatial and temporal distribution characteristics of occurrence frequency of extremely low temperature events in spring in Shandong and the anomalous characteristics. . .
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Spatio-temporal distribution characteristics of greenhouse gases and their influence factors in Linfen with typical high-carbon emission#br#
GAO Xingai, ZHU Lingyun, YAN Shiming, PEI Kunning, ZHANG Fengsheng, WANG Shumin, CHENG Pengwei
Journal of Arid Meteorology, 2022 40 (2): 265
Based on observation data of CO2, CH4 mole fraction and temperature, relative humidity, wind speed and wind direction at Linfen station of Shanxi from 2013 to 2018, and ERA-5 PBL (planet boundary layer) reanalysis data from the European Center for Mediumrange Weather Forecasts (ECMWF) and GDAS (global data assimilation system) reanalysis data from the National Centers for Environmental Prediction (NCEP), the spatio-temperal distribution characteristics of two greenhouse gases concentration and their influence factors were analyzed in Linfen with high carbon emission. The results show that the annual average CO2 and CH4 mole fractions were 441.7×10-6 and 2359.5×10-9 at Linfen station, r. . .
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Correction method of surface solar radiation forecast based on ZJWARMS
GU Tingting, PAN Yaying, ZHANG Jiayi
Journal of Arid Meteorology, 2022 40 (2): 332
Using the radiation observational data at Hangzhou station and the hourly simulation output data by Zhejiang WRF ADAS real_time modeling system (ZJWARMS), the forecast effect of radiation was evaluated in 2019. On this basis, the MOS correction models under different weather conditions were built based on ten meteorological factors from ZJWARMS output, including shortwave radiation flux, cloud cover, surface temperature, humidity, etc. The results showed that ZJWARMS had a good ability in simulating the diurnal variations of surface solar radiation, the correlation coefficient between simulation value and observation value of radiation was 0.82. However, the system generally overestimated su. . .
