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A super Asian dust storm over the East and South China Seas: disproportionate dust deposition

Hsu, Shih-Chieh; Tsai, Fujung; Lin, Fei-Jan; Chen, Wei-Nai; Shiah, Fuh-Kwo; Huang, Jr-Chuan; Chan, Chuen-Yu; Chen, Chung-Chi; Liu, Tsun-Hsien; Chen, Hung-Yu; Tseng, Chun-Mao; Hung, Gwo-Wei; Huang, Chao-Hao; Lin, Shuen-Hsin; Huang, Yi-Tang

Authors

Shih-Chieh Hsu schsu815@rcec.sinica.edu.tw

Fujung Tsai

Fei-Jan Lin

Wei-Nai Chen

Fuh-Kwo Shiah

Jr-Chuan Huang

Chuen-Yu Chan john.chan@nottingham.edu.cn

Chung-Chi Chen

Tsun-Hsien Liu

Hung-Yu Chen

Chun-Mao Tseng

Gwo-Wei Hung

Chao-Hao Huang

Shuen-Hsin Lin

Yi-Tang Huang

Abstract

A super Asian dust (SAD) storm that originated from North China has affected East Asia since 20 March 2010. The tempo-spatial and size distributions of aerosol Al, a tracer of wind-blown dust, were measured on a regional aerosol network in March 2010. Two dust events were recorded: the SAD and a relatively moderate AD event. The SAD clouds raised Al concentrations to ~50 µg/m3 on 21 and 22 March over the East China Sea (ECS) and occupied there for ~5 days. The SAD plume also stretched toward the South China Sea (SCS) on 21 March however, it caused a maximum Al concentration of ~8.5 µg/m3 only, much lower than that observed in the ECS. In comparison, a weaker dust plume on 16 March caused Al maximum of ~4 µg/m3 over the ECS, and comparably, ~3 µg/m3 in the SCS. Dry dust deposition was measured during the peak phase of the SAD at 178 mg/m2/d, which corresponded to dry deposition velocities of 0.2–0.6 cm/s only, much lower than the commonly adopted one (1–2 cm/s). The corresponding increase in dust deposition by the SAD was up to a factor of ~12, which was, however, considerably disproportionate to the increase in dust concentration (i.e., the factor of over 100). In certain cases, synoptic atmospheric conditions appear to be more important in regulating dust contribution to the SCS than the strength of AD storms.

Journal Article Type Article
Publication Date Jul 16, 2013
Journal Journal of Geophysical Research: Atmospheres
Print ISSN 2169-897X
Electronic ISSN 2169-8996
Publisher American Geophysical Union
Peer Reviewed Peer Reviewed
Volume 118
Issue 13
Institution Citation Hsu, S., Tsai, F., Lin, F., Chen, W., Shiah, F., Huang, J., …Huang, Y. (2013). A super Asian dust storm over the East and South China Seas: disproportionate dust deposition. Journal of Geophysical Research: Atmospheres, 118(13), doi:10.1002/jgrd.50405
DOI https://doi.org/10.1002/jgrd.50405
Keywords Asian dust, dust deposition, dust iron, East China Sea, South China Sea, long-range transport
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/jgrd.50405/abstract;jsessionid=E4B67DB296A04103D579E5126E62B10E.f03t04
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information ©2013. American Geophysical Union. All Rights Reserved.

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