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| Comparative Analysis on Causing Factors of Dust Events |
| JIAO Mei-yan, NIU Ruo-yun, ZHAO Lin-na, YAN Hao |
| China Meteorology Center, Beijing 100081, China |
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Abstract The dust weathers both in 2002 and 2003 are compared in their general characters of atmospheric circulations and land surface conditions. The typical events were simulated by numerical dust model with dust emission process to diagnose the dynamical processes in the duration of events. The results show that the strength and the affected area of dust events are mainly depended on the dynamic situations of atmosphere, while the occurrences of dust events are sensitive to the land surface conditions. Further, it is found that the vertical transport process of sand-dust is the controlling factor to the strength and the affected area. Based on the diagnosis a concept model was given for simulating dust transporting vertically transporting-horizontally transporting-depositing.
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Received: 21 January 2004
Published: 20 December 2004
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2004, Vol. 24 
