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Asian Dust Storm Observed at a Rural Mountain Site in Southern China: Chemical Evolution and Heterogeneous Photochemistry : Volume 12, Issue 8 (02/08/2012)

By Nie, W.

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Book Id: WPLBN0003973381
Format Type: PDF Article :
File Size: Pages 27
Reproduction Date: 2015

Title: Asian Dust Storm Observed at a Rural Mountain Site in Southern China: Chemical Evolution and Heterogeneous Photochemistry : Volume 12, Issue 8 (02/08/2012)  
Author: Nie, W.
Volume: Vol. 12, Issue 8
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Ding, A. J., Xue, L. K., Gao, R., Liu, X. H., Wang, T., Fan, S. J.,...Yu, Y. C. (2012). Asian Dust Storm Observed at a Rural Mountain Site in Southern China: Chemical Evolution and Heterogeneous Photochemistry : Volume 12, Issue 8 (02/08/2012). Retrieved from http://worldlibrary.in/


Description
Description: Environment Research Institute, Shandong University, Jinan, China. Heterogeneous processes on dust particles are important for understanding the chemistry and radiative balance of the atmosphere. This paper investigates an intense Asian dust storm episode observed at Mount Heng (1250 m a.s.l.) in Southern China on 24–26 April 2009. A set of aerosol and trace gas data collected during the study was analyzed to investigate their chemical evolution and heterogeneous photochemistry as the dust traveled to Southern China. Results show that the mineral dust arriving at Mt. Heng experienced significant modifications during transport, with large enrichments in secondary species (sulfate, nitrate, and ammonium) compared with the dust composition collected at an upwind mountain top site (Mount Hua). A photochemical age clock (−log10(NOx/NOy)) was employed to quantify the atmospheric processing time. The result indicates an obvious increase in the abundance of secondary water-soluble ions in dust particles with the air mass' photochemical age. Based on the observations, a 4-stage evolution process is proposed for carbonate-rich Asian dust, starting from fresh dust to particles coated with hydrophilic and acidic materials. Daytime-enhanced nitrite formation on the dust particles was also observed, which indicates the recent laboratory result of the TiO2 photocatalysis of NO2 as a potential source of nitrite and nitrous acid.

Summary
Asian dust storm observed at a rural mountain site in Southern China: chemical evolution and heterogeneous photochemistry

Excerpt
Gustafsson, R. J., Orlov, A., Griffiths, P. T., Cox, R. A., and Lambert, R. M.: Reduction of NO2 to nitrous acid on illuminated titanium dioxide aerosol surfaces: implications for photocatalysis and atmospheric chemistry, Chem. Commun., 42, 3936–3938, 2006.; %Gustafsson,~R J., Orlov,~A., Griffiths,~P T., Cox,~R A., and Lambert,~R M.: Reduction of \chemNO_2 to nitrous acid on illuminated titanium dioxide aerosol surfaces: implications for photocatalysis and atmospheric chemistry, Chem. Commun., \blackboxPlease provide volume., 3936–3938, 2006. %\blackboxthis seems to be the same as the reference before. Please check.; Huang, K., Zhuang, G., Li, J., Wang, Q., Sun, Y., Lin, Y., and Fu, J. S.: Mixing of Asian dust with pollution aerosol and thetransformation of aerosol components during the dust storm over Chinain spring 2007, J. Geophys. Res.-Atmos., 115, D00K13, doi:10.1029/2009jd013145, 2010.; Jacob, D. J., Crawford, J. H., Kleb, M. M., Connors, V. S., Bendura, R. J., Raper, J. L., Sachse, G. W., Gille, J. C., Emmons, L., and Heald, C. L.: Transport and chemical evolution over the Pacific (TRACE-P) aircraft mission: design, execution, and first results, J. Geophys. Res.-Atmos., 108, 9000, doi:10.1029/2002jd003276, 2003.; Jang, M., Czoschke, N. M., Lee, S., and Kamens, R. M.: Heterogeneous atmospheric aerosol production by acid-catalyzed particle-phase reactions, Science, 298, 814–817, 2002.; Kleffmann, J.: Daytime sources of nitrous acid (HONO) in the atmospheric boundary layer, ChemPhysChem, 8, 1137–1144, 2007.; Kleinman, L. I., Springston, S. R., Daum, P. H., Lee, Y.-N., Nunnermacker, L. J., Senum, G. I., Wang, J., Weinstein-Lloyd, J., Alexander, M. L., Hubbe, J., Ortega, J., Canagaratna, M. R., and Jayne, J.: The time evolution of aerosol composition over the Mexico City plateau, Atmos. Chem. Phys., 8, 1559–1575, doi:10.5194/acp-8-1559-2008, 2008.; Laurent, B., Marticorena, B., Bergametti, G., and Mei, F.: Modeling mineral dust emissions from Chinese and Mongolian deserts, Global Planet. Change, 52, 121–141, 2006.; Li, W. J. and Shao, L. Y.: Observation of nitrate coatings on atmospheric mineral dust particles, Atmos. Chem. Phys., 9, 1863–1871, doi:10.5194/acp-9-1863-2009, 2009.; Nicolas, M. L., Ndour, M., Ka, O., D'Anna, B., and George, C.: Photochemistry of atmospheric dust: ozone decomposition on illuminated titanium dioxide, Environ. Sci. Technol., 43, 7437–7442, 2009.; Matsuki, A., Iwasaka, Y., Shi, G. Y., Chen, H. B., Osada, K., Zhang, D., Kido, M., Inomata, Y., Kim, Y. S., Trochkine, D., Nishita, C., Yamada, M., Nagatani, T., Nagatani, M., and Nakata, H.: Heterogeneous sulfate formation on dust surface and its dependence on mineralogy: balloon-borne observations from ballon-borne measurements in the surface of Beijing, China, Water Air Soil Poll., 5, 101–132, 2005.; Ndour, M., D'Anna, B., George, C., Ka, O., Balkanski, Y., Kleffmann, J., Stemmler, K., and Ammann, M.: Photoenhanced uptake of NO2 on minera

 

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