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《Chinese Journal of Atmospheric Sciences》 2017-01
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A Numerical Study of the Effect of Aerosols Acting as Ice Nuclei on the Precipitation and Microphysical Processes in a Multi-size Convective Storm Occurring in Aksu in Xinjiang, Northwest China

WANG Yu;YIN Yan;CHEN Qian;WANG Xu;XIAO Hui;Key Laboratory of Aerosols–Cloud–Precipitation,China Meteorological Administration,Nanjing University of Information Science &Technology;Xinjiang Uygur Autonomous Region Weather Modification Office;  
A multi-size convective storm occurring in Aksu region in Xinjiang, Northwest China was simulated using the Weather Research and Forecasting(WRF) mesoscale model, which includes the parameterization for the concentration of ice nuclei proposed by De Mott et al.(2010). Sensitivity tests have been conducted and results were compared underdifferent background conditions to investigate the response of cloud microphysical processes and precipitation to changes in concentrations of ice nuclei. It is found that the increase in concentrations of ice nuclei under the background aerosol condition and dust condition has little influence on rainfall rate in central area of the rain region, but has a significant influence on the regional distribution of the rainfall. The mass and number concentrations of ice crystal and snow particle increase obviously with the increase in the concentration of ice nuclei under different conditions. The main source of snow growth is the deposition of snow. The main source of graupel growth is the collection of supercooling cloud droplets by ice phase particles. When the concentration of ice nuclei increases in the background aerosol condition and dust condition, the number concentration of graupel increases but the graupel size decreases.
【Fund】: 公益性行业(气象)专项GYHY201306047;; 江苏高校优势学科建设工程项目(PAPD)~~
【CateGory Index】: P426.6
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【Citations】
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1 QIU Yujun;WANG Hongao;Key Laboratory of Meteorological Disaster,Ministry of Education(KLME),Nanjing University of Information Science & Technology;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science & Technology;;The vertical distribution of cloud properties in two regions of northern China based on CloudSat/CALIPSO data[J];大气科学学报;2017-04
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