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- Title
Characterization and Temporal Variation of Asian Dust Aerosol from a Site in the Northern Chinese Deserts.
- Authors
Zhang, X. Y.; Gong, S. L.; Arimoto, R.; Shen, Z. X.; Mei, F. M.; Wang, D.; Cheng, Y.
- Abstract
Time series for total aerosol mass and the concentrations of nineteen elements, and the mass particle-size distributions of the elements, were determined for samples collected from a site in the northern deserts of China -Zhenbeitai, one of ground sites of the Asia-Pacific Regional Aerosol Characterization Experiment (ACE-Asia). Nine dust storm (DS) events were observed during the spring of 2001, lasting a combined total of twenty-six days. Peak mass loadings greatly exceeded the average (260 μg m-3), and higher than average dust-element concentrations and wind speeds were also observed during the three-month study. Material balance calculations showed that ∼82% mass of the total aerosol particles could be ascribed to Asian dust, of which Al, Ca, Fe, K, Mn, Si and Ti accounted for 7%, 6%, 4%, 2%, 0.1%, 32% and 1% by weight, respectively. Modelcalculated dry deposition velocities for 7 dust-elements during dust storm periods averaged 17 cm s-1 and ranged from 14 to 21 cm s-1. The estimated dry depositiona of Asian dust for the spring of 2001 was 189 g m-2, of which 85% was due to dust storms. Factor analysis indicated that ∼89% of the dust loading during this period was due to remote or regional transport; ∼11% to local or background dust.
- Subjects
CHINA; DUST; AEROSOLS; DESERTS; DUST storms; WIND speed
- Publication
Journal of Atmospheric Chemistry, 2003, Vol 44, Issue 3, p241
- ISSN
0167-7764
- Publication type
Article
- DOI
10.1023/A:1022900220357