复杂地形上大气扩散规律的比较研究  

A Comparative Study on Atmospheric Diffusion Rules Over Complex Terrians

作　　者：张武[1] 冯广泓[1] 张培群[1] 

机构地区：[1]兰州大学大气科学系

出　　处：《兰州大学学报（自然科学版）》1997年第4期140-143,共4页Journal of Lanzhou University(Natural Sciences)

摘　　要：利用三次在不同地形条件下由Ｇｉｌ型双向风标风速仪测得的资料，对复杂地形下大气扩散规律进行了比较研究．研究表明，在此类地形条件下的大气扩散参数对地形与稳定度比较敏感，地形越复杂、大气越不稳定，则水平扩散参数曲线与Ｐ—Ｇ曲线相差就越大；现有的σφ稳定度分类法，受地形影响很大；复杂地形很难出现极端稳定或不稳定层结，但在特殊地形下形成的特殊气象条件会使大气产生特殊的稳定层结，而不利于扩散．Based on three series of data collected by Gill bivence anemometer, the atmospheric diffusion rules over complex areas are compared. It is shown that, in such areas the atmospheric diffusion parameters are sensitive to terrians and stability. The difference between the horizon diffusion curves and the PG curves will be large wihle the terrians is complex and the air is unstable. The stability classified method is affected by the terrains. In complex areas, it is difficulty to find the extremely stable or unstable situation. Under the particular meteorology condition, there is a special stable situation that is not available for diffusion.

关 键 词：复杂地形 大气扩散 大气污染 污染物扩散 

分 类 号：X16[环境科学与工程—环境科学]