关键词: 蒙古气旋, 沙尘暴, 沙尘传输

Abstract:

By using the output data of numerical simulation based on a dusty weather numerical prediction model and sensitive test about the surface dust rising coefficient at different areas, the dust transportation characteristics and its formation causes in the dusty weather process induced by Mongolia cyclone were analyzed. The result showed that in the process the dust particles eastward transportation enhanced while the latitude of the dust resource area increased. Contrariwise, the southward transportation enhanced. Meanwhile, the eastward transportation enhanced while the altitude of dust particles increased. Contrariwise, the southward transportation enhanced. This phenomenon is caused by collective effect of the Sayan mountain's lee affection, the air stream forced by the Qinghai-Tibet plateau north-eastern boundary and the dynamic and thermodynamic structure of Mongolia cyclone. Most of these elements are natural and so these results are universal.

Key words: Mongolia cyclone, dust storm, dust particle transportation