区域气候模拟中Betts-Miller对流参数化方案的敏感性试验  

The Sensitivity Experiments of Betts-Miller Convective Parameterization Scheme in Regional Climate Simulation

作　　者：翟国庆[1] 高坤[1] 潘劲松 

机构地区：[1]浙江大学地球科学系,杭州310028 [2]浙江省气象台,杭州310021

出　　处：《大气科学》2003年第3期330-344,共15页Chinese Journal of Atmospheric Sciences

基　　金：国家九五重中之重项目 96- 90 8- 0 2 - 0 4资助

摘　　要：利用NCARRegCM2气候模式 ,对Betts Miller对流参数化方案中影响参考态的几个关键性参数 :稳定度参数α、云底和冻结层参考态的饱和气压Δp 和对流调整时间τ进行了敏感性试验 ,分析这些参数的不同取值对区域气候模拟的影响及意义 ,并由此提出适合我国东部地区汛期区域气候模拟的Betts Miller对流参数化方案中较优的关键性参数取值。By using NCAR regional climate model (REGCM2), the sensitivity tests of Betts-Miller(BM) convective parameterization scheme to the adjustable parameters, such as adjustment time scale τ, stability parameter α and saturation pressure departure Δp* at cloud base and the freezing level were conducted. The influence and meanings of these parameters to the regional climate simulation during flood season in east China were discussed. Finally the optimum parameter set of BM scheme was presented, which improves significantly the climatic simulation of thermodynamics structure and precipitation in east China.

关 键 词：Betts-Mmer对流参数化方案 区域气候模拟 洪涝 气候异常 

分 类 号：P467[天文地球—大气科学及气象学]