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《Journal of Chengdu University of Information Technology》 2017-05
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Impact of Different Boundary Layer Parameterization Schemes on the Numerical Smiulation for a Typhoon Rain Event in WARMS 2.0

DAI Xin-lu;CHEN Bao-de;ZHANG Xu;FAN Guang-zhou;College of Atmospheric Sciences,Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,Joint Laboratory of Climate and Environment Change,Chengdu University of Information Technology;Shanghai Innovative Center of Regional High Resolution NWP;Shanghai Typhoon Institute,CMA ,Key Laboratory of Numerical Modeling for Tropical Cyclone,CMA;  
In order to analyze the simulation results of precipitation and the effects of local and nonlocal mixing of planetary boundary layer parameterization schemes in high resolution numerical forecast model,WRF ADAS Real-time Modeling System 2.0(WARMS 2.0) is used.And a case of heavy rainfall process near a typhoon were numerically simulated using different boundary layer parameterization schemes.The main conclusions are as follows: the nonlocal mixing YSU scheme has the best simulation ability about the location of the strong precipitation center and the structure of the typhoon rain belt,but the intensity is stronger; the local mixing YSU scheme is tend to produce a small amount of nonexistent precipitation; without boundary layer parameterization schemes,the simulation capacity of this modle is weakest,and the precipitation range is least,moreover,the intensity is weakest,which has a lot of difference with the observated rainfall.The turbulence in the vertical direction is stronger,and the range and intensity of the strong precipitation are larger in the nonlocal mixing scheme.Based on the precipitation tests,the nonlocal mixing YSU scheme is superior to other schemes for the simulation,while the local mixing MYJ scheme is easier to predict the smaller magnitude precipitation.
【Fund】: 国家自然基金青年基金资助项目(41505087);国家自然基金面上资助项目(41575101)
【CateGory Index】: P457.6
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