Development of a Single-Column Model in RegCM4 and Its Preliminary Application for Evaluating PBL Schemes in Simulating the Dry Convection Boundary Layer

作     者：韩振宇 王宇星 HAN Zhen-yu;WANG Yu-xing

作者机构：National Climate CenterChina Meteorological AdministrationBeijing 100081 China National Marine Hazard Mitigation ServiceMinistry of Natural ResourcesBeijing 100194 China 

出 版 物：《Journal of Tropical Meteorology》 (热带气象学报（英文版）)

年 卷 期：2021年第27卷第3期

页      面：259-271页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：National Key R&D Program of China(2018YFA0606301 2020YFA0608201 2017YFA0605004) National Natural Science Foundation of China(41405101) 

主　　题：single-column model RegCM4 dry convection boundary layer boundary layer schemes 

摘      要：A single-column model(SCM)is developed in the regional climate model *** evolution of a dry convection boundary layer(DCBL)is used to evaluate this ***,four planetary boundary layer(PBL)schemes,namely the Holtslag-Boville scheme(HB),Yonsei University scheme(YSU),and two University of Washington schemes(UW01,Grenier-Bretherton-Mc Caa scheme and UW09,Bretherton-Park scheme),are compared by using the SCM approach.A large-eddy simulation(LES)of the DCBL is performed as a benchmark to examine how well a PBL parameterization scheme reproduces the LES results,and several diagnostic outputs are compared to evaluate the *** results show that the SCM is properly *** general,with the DCBL case,the YSU scheme performs best for reproducing the LES results,which include well-mixed features and vertical sensible heat fluxes;the simulated wind speed,turbulent kinetic energy,entrainment flux,and height of the entrainment zone are all underestimated in the UW09;the UW01 has all those biases of the UW09 but larger,and the simulated potential temperature is not well mixed;the HB is the least skillful scheme,by which the PBL height,entrainment flux,height of the entrainment zone,and the vertical gradients within the mixed layer are all overestimated,and a inversion layer near the top of the surface layer is wrongly *** more cases and further testing are required,these simulations show encouraging results towards the use of this SCM framework for evaluating the simulated physical processes by the RegCM4.