二十面体和经纬网格模式在正压情况下的模拟效果对比分析  

Comparison analysis on simulation effects of the model with icosahedron spherical mesh with the latitude-longitude mesh model in barotropic condition

作　　者：刘维 刘宇迪 赵世梅 文映方 陆昱彤 

机构地区：[1]中国人民解放军92914部队,海南临高571833 [2]国防科技大学气象海洋学院,南京211101

出　　处：《气象科学》2017年第4期529-534,共6页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(41175089)

摘　　要：利用MPAS(Model for Prediction Across Scales)和北京大学浅水模式(PKU_SWM)对余弦钟和Rossby-Haurwitz波理想个例进行了模拟。结果表明:在余弦钟测试中,MPAS能更好的模拟出余弦钟的基本形态,但模拟结果的绝对误差较大;网格分辨率提高后,MPAS模拟效果提升得更明显。在Rossby-Haurwitz波测试中,MPAS模拟的槽脊位置和强度更加接近于初始分布形态,PKU_SWM模拟的槽脊的强度偏强,位置偏西,MPAS模拟效果整体要优于PKU_SWM;网格分辨率提高后,两模式模拟效果都有较大的提升。In order to comparatively analyze the simulation performance of the models with icosahedron mesh and latitude-longitude mesh, the Model for Prediction Across Scales （MPAS） and PKU_SWM are used to simulate Cosine bell and Ross-by-Haurwitz wave. Results show that the MPAS can better sim- ulate the basic state of Cosine bell under low resolution, but the absolute errors of the simulated results are bigger. The simulation effects are improved more obviously with the resolution improvement. From the results of Rossby-Haurwitz wave test, the simulated location and intensity of the trough-ridge from MPAS are much closer to the actual cases, but from PKU_SWM they are more westerly and stronger. On the whole, the simulation effects of MPAS are better than the PKU_SWM. Besides, the results of the two models are greatly improved with the resolution improvement.

关 键 词：二十面体网格 经纬网格 余弦钟 Rossby—Haurwitz波 

分 类 号：P459.9[天文地球—大气科学及气象学]