中尺度模式中不同对流参数化方案的比较试验  

THE COMPARATIVE TRIAL EXPERIMENTS WITH DIFFERENT CONVECTION PARAMETERIZATION SCHEMES IN MESOSCALE MODELS

作　　者：李燕[1,2] 邱崇践[1] 张建国 

机构地区：[1]兰州大学资源环境学院,甘肃兰州730000 [2]大连市气象台,辽宁大连116001 [3]大连市气象信息网络中心,辽宁大连116001

出　　处：《热带气象学报》2008年第6期609-618,共10页Journal of Tropical Meteorology

基　　金：国家自然科学基金项目“东海黑潮三维结构及季节变化研究”(40406009)资助

摘　　要：MM5模式中有多种积云参数化方案可供选择,粗细网格采用不同的积云参数化方案对降水预报有一定的影响。采用常用的四种积云参数化方案,粗细网格进行不同配置,对辽东半岛大暴雨过程进行试验发现:细网格信息可以通过嵌套边界向外层传递,影响外层预报结果。细网格选取GR方案比选取AK、BM、KF方案模拟效果好很多;细网格参数化方案不变,粗网格取不同的参数化方案,对细网格的模拟结果差别不大。但选取一个好的参数化方案对细网格的模拟结果会稍有改进。There are a number of cumulus parameterization schemes（CPSs） to choose from in the mesoscale numerical model MM5. The difference in CPSs for coarse and fine meshes will influence the precipitation forecast. This study adopts four common CPSs and different allocations of coarse meshes and fine meshes to simulate a heavy rainstorm process on Liao Dong Peninsula. The following points have been summarized. The information in the fine mesh can be transferred to outer layers across the nested boundary so as to affect the forecast results. If the GR scheme is used for the fine mesh, better simulation can be achieved than with the AK, BM or KF schemes. With parameterization scheme remaining unchanged in the fine mesh, its simulated results do not vary much with different parameterization schemes used in the coarse mesh. However, a good scheme will slightly improve the simulated results of the fine mesh.

关 键 词：MM5模式 大暴雨 中尺度系统 数值模拟 对流参数化 

分 类 号：P435[天文地球—大气科学及气象学]