A Numerical Study of Sensitivity of the Physical Dissipative Technique to Precipitation Parameterization in a Mesoscale

In this paper the numerical comparative experiments on sensitivity of the physical dissipative technique to the precipitation parameterizations, especially the different combination of the explicit micro-physical schemes and cumulus convection parameterizations, in the PSU/NCAR mesoscale model MM5V3 with a triple-nested domain are conducted using the case of heavy rain occurring in the northern China in October 2003. The experiments have revealed some meaningful results, notably the dramatic improvement in the simulative accuracy and quality by the physical dissipative technique based on the second law of thermodynamics, meanwhile, the weak sensitivity of the technique to the schemes of parameterization resulting mainly from improving the field of rainfall by the physical dissipative technique has been reached via improving the outputs of the model variables such as wind field determining the divergence field that is one of the most important factors in the case of designing the schemes of precipitation parameterization.

作 者： LIU Ying LIU Chongjian XU Hui ZHAO Yongming   作者單位： LIU Ying,LIU Chongjian,XU Hui(Chinese Academy of Meteorological Sciences, Beijing 100081)

ZHAO Yongming(CMA China Meteorological Administration Training Center, Beijing 100081) 

刊 名： 氣象學報（英文版）  SCI 英文刊名： ACTA METEOROLOGICA SINICA  年，卷(期)： 2005 19(1)  分類號： P4  關鍵詞： numerical simulation   mesoscale   dissipation   precipitation parameterization  

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