Observational Study on the Particle Size Distribution of SandAerosol in Zhangye and Yuzhong of Lanzhou

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Plateau Meteorology ›› 2011, Vol. 30 ›› Issue (1) : 208-216.

Observational Study on the Particle Size Distribution of SandAerosol in Zhangye and Yuzhong of Lanzhou

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Abstract

Based on the aerosol data in Zhangye and Yuzhong of Lanzhou in spring, the characteristics of the sand aerosol concetration change and particle size distribution of a typical severe dust weather process happened in May have been principally analyzed. The analysis indicates that the occurrence of this sandstorm is related to the frontal passage. Comparing with the aerosol concentration in the background weather, it is found that the aerosol concentration is predominantly affected by anthropogenic source at the Yuzhong station and natural source at the Zhangye station. The occurrence time and physical properties of dust weather process are not exactly the same in these two places. The backward trajectory method shows that, many different sources existed in this dusty weather. Owing to the influences of geographical location and landform of Hexi Corridor, the dust weather occurs more frequent and serious in Zhangye than in Lanzhou.

Key words

Zhangye and Yuzhong / Sand process / Mass concentration / Number concentration / Particle size distri / Air mass trajectory / Frontal surface

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. Observational Study on the Particle Size Distribution of SandAerosol in Zhangye and Yuzhong of Lanzhou. Plateau Meteorology. 2011, 30(1): 208-216

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