热带气象学报2017，Vol.33Issue(6)：793-811,19.DOI:10.16032/j.issn.1004-4965.2017.06.001
不同边界层参数化方案对一次梅雨锋暴雨过程湍流交换特征模拟的影响
THE EFFECT OF BOUNDARY LAYER PARAMETERIZATION SCHEMES ON THE SIMULATION OF TURBULENT EXCHANGE PROPERTIES OF A MEI-YU RAINSTORM
摘要
Abstract
Different planetary boundary layer parameterizations in the WRF model are used to simulate a heavy rainfall in Yangtze-Huaihe basin during July 3-5,2007.The results indicate that the use of different parameterization schemes has impact on the distribution and intensity of the rainstorm.The differences in precipitation rate and surface factors become larger as the rainstorm goes on.The differences in the vertical distribution of horizontal wind fields,vertical velocity and potential pseudo-equivalent temperature caused by the use of different schemes,have direct effect on the simulation of the rainstorm.The vertical distribution of turbulent kinetic energy (TKE) different from the clear state is simulated well by all schemes,with positive effect from wind shear and TKE transport and negative from buoyancy.The characteristics of turbulent exchange simulated by different schemes correspond well to those of TKE.Compared with other schemes,MYJ simulated weaker TKE development and turbulent exchange,and weaker vertical transport of heat fluxes.GBM predicted weaker exchange within the boundary layer,and much larger exchange coefficients above PBL.The vertical transport of heat flux at higher levels simulated by GBM showed obvious errors and influenced the simulation of meteorological elements in the precipitation area.Thus,further improvement is still needed.As to this case,the MYNN Level-3 scheme performs the best simulation.关键词
WRF模式/边界层参数化方案/梅雨暴雨/湍流动能/湍流交换Key words
WRF model/PBL parameterization scheme/Mei-yu rainstorm/turbulent kinetic energy(TKE)/turbulent exchange分类
天文与地球科学引用本文复制引用
沈新勇,马铮,郭春燕,李小凡..不同边界层参数化方案对一次梅雨锋暴雨过程湍流交换特征模拟的影响[J].热带气象学报,2017,33(6):793-811,19.基金项目
国家自然科学基金项目(41375058、41530427、41475039) （41375058、41530427、41475039）
国家重点研发计划(2016YFC0203301) （2016YFC0203301）
国家重点基础研究发展计划973项目(2015CB453201) （2015CB453201）
江苏省自然科学基金重点项目(BK20150062)共同资助 （BK20150062）
