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A STUDY OF THE INFLUENCE OF MICROPHYSICAL PROCESSES ON TYPHOON NIDA (2016) USING A NEW DOUBLE-MOMENT MICROPHYSICS SCHEME IN THE WEATHER RESEARCH AND FORECASTING MODEL
  Revised:March 06, 2018
KeyWords:Liuma microphysics scheme  typhoon intensity  cloud microphysics  typhoon structure  Weather Research and Forecasting model
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Author NameAffiliationE-mail
LI Zhe 1. Numerical Weather Prediction Center of CMA, Beijing 100081 China
2. National Meteorological Center, CMA, Beijing 100081 China 
liz@cma.gov.cn 
ZHANG Yu-tao   
LIU Qi-jun   
FU Shi-zuo   
MA Zhan-shan   
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Abstract:
      The basic structure and cloud features of Typhoon Nida (2016) are simulated using a new microphysics scheme (Liuma) within the Weather Research and Forecasting (WRF) model. Typhoon characteristics simulated with the Liuma microphysics scheme are compared with observations and those simulated with a commonly- used microphysics scheme (WSM6). Results show that using different microphysics schemes does not significantly alter the track of the typhoon but does significantly affect the intensity and the cloud structure of the typhoon. Results also show that the vertical distribution of cloud hydrometeors and the horizontal distribution of peripheral rainband are affected by the microphysics scheme. The mixing ratios of rain water and graupel correlate highly with the vertical velocity component and equivalent potential temperature at the typhoon eye-wall region. According to the simulation with WSM 6 scheme, it is likely that the very low typhoon central pressure results from the positive feedback between hydrometeors and typhoon intensity. As the ice-phase hydrometeors are mostly graupel in the Liuma microphysics scheme, further improvement in this aspect is required.
DOI:10.16555/j.1006-8775.2018.02.001
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