山地对流云的数值模拟  

Numerical Simulation of Mountainous Convective Cloud

作　　者：蔡丹[1] 孙立潭[1] 徐涛 

机构地区：[1]解放军理工大学气象学院,江苏南京211101 [2]空军威海场站气象台,山东威海264411

出　　处：《解放军理工大学学报（自然科学版）》2002年第4期92-96,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：采用地形追随坐标 ,首先建立了一个包含复杂地形的完全弹性三维中尺度暖云模式。利用该模式 ,主要模拟了地形抬升对云的触发作用 ,并进一步研究不同地形对已发展的对流云的动力影响。分析结果表明 :在适宜的温湿条件下 ,一定高度的地形抬升能够生成较强的对流云 ;对于较弱的对流云 ,上坡地形能够使其发展增强 ,而下坡地形则会使其减弱。以上结论与观测事实和文献 [4,5 ]结论相符 。A full-elastic meso-scale warm cloud model with the effects of topography is established by using a terrain-following coordinate system to simulate convective cloud generated by lifting force of topography, and to further study the dynamical influence of different topography on the development of convective cloud. The results indicate that, the lifting force of topography could generate the convective cloud if the air is of moderate temperature and humidity condition; for weak convective cloud, the upslope of topography can increase the development of the cloud, while the downslope can restrain it. These results are consistent with the previous studies and the observations, and so it proves that the dynamical structure of the model with topography is reasonable.

关 键 词：山地 数值模拟 中尺度暖云模式 地形抬升 对流云 触发机制 地形追随坐标 

分 类 号：P457.1[天文地球—大气科学及气象学] P456.7