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Hygroscopic Growth of Urban Aerosol Particles in Beijing (China) During Wintertime: a Comparison of Three Experimental Methods : Volume 9, Issue 2 (16/03/2009)

By Meier, J.

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Book Id: WPLBN0003998490
Format Type: PDF Article :
File Size: Pages 39
Reproduction Date: 2015

Title: Hygroscopic Growth of Urban Aerosol Particles in Beijing (China) During Wintertime: a Comparison of Three Experimental Methods : Volume 9, Issue 2 (16/03/2009)  
Author: Meier, J.
Volume: Vol. 9, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Massling, A., Wehner, B., Birmili, W., Nowak, A., Wiedensohler, A., Meier, J.,...Herrmann, H. (2009). Hygroscopic Growth of Urban Aerosol Particles in Beijing (China) During Wintertime: a Comparison of Three Experimental Methods : Volume 9, Issue 2 (16/03/2009). Retrieved from http://www.ebooklibrary.org/


Description
Description: Leibniz Institute for Tropospheric Research, Leipzig, Germany. This paper presents hygroscopicity measurements of aerosol particles in the urban atmosphere of Beijing carried out in January 2005. Therefore, three different methods were used: 1) Combining Humidifying Differential Mobility Particle Sizer (H-DMPS) and Twin Differential Mobility Particle Sizer (TDMPS) measurements; 2) Hygroscopicity Tandem Differential Mobility Analyzer (H-TDMA) technique; 3) Calculating hygroscopic growth factors on the basis of a solubility model quantified by Micro Orifice Uniform Deposit Impactor (MOUDI) samples. Particle number size distributions from H-DMPS and TDMPS were evaluated to derive size-resolved descriptive hygroscopic growth factors (DHGF) of 30–400 nm particles at relative humidities (RH) of 55%, 77% and 90%. The atmospheric particles in Beijing were rather hydrophobic, with a maximum growth factor in the accumulation mode around 1.40 (±0.03) at 90% RH. The descriptive hygroscopic growth factors decreased significantly towards the lower measurement limit (1.04 (±0.15) at Dp=30 nm). A good agreement was found between the DHGFs and the H-TDMA-derived hygroscopic growth factors in the accumulation mode (100–400 nm), the DHGFs underestimated the values from the H-TDMA in the Aitken mode (<100 nm) by up to 0.1 at 90% RH. The calculation of hygroscopic growth factors based on the measured chemical composition showed that different modes of combining the inorganic ions caused a variation in growth factor of 0.1 at 90% RH. The solubility model was able to reproduce the size-dependent trend in the growth factor found by the other methods. In two cases of ion-dominated aerosol, the composition-derived growth factors tended to agree (±0.05) or underestimate (up to 0.1) the values measured by the other two methods. In the case of the organic-dominated aerosol, the reverse was true, with an overestimation of up to 0.2. The results shed light on the real experimental and methodological uncertainties that are still connected with the determination of hygroscopic growth factors.

Summary
Hygroscopic growth of urban aerosol particles in Beijing (China) during wintertime: a comparison of three experimental methods

Excerpt
Achtert, P., Birmili, W., Nowak, A., Wehner, B., Wiedensohler, A., Takegawa, N., Kondo, Y., Miyazaki, Y., Hu, M., and Zhu, T.: Hygroscopic growth of tropospheric particle number size distributions over the North China Plain, J. Geophys. Res., in press, 2009.; Bergin, M. H., Cass, G. R., Xu, J., Fang, C., Zeng, L. M., Yu, T., Salmon, L. G., Kiang, C. S., Zhang, Y. H., and Chameides, W. L.: Aerosol radiative, physical, and chemical properties in Beijing during June 1999, J. Geophys. Res., 106(D16), 17969–17980, 2001.; Birmili, W., Stratmann, F., and Wiedensohler, A: Design of a DMA-based size Spectrometer for a large Particle Size Range and Stable Operation, J. Aerosol Sci., 30(4), 549–553, 1999.; Florig, H. K.: China's air pollution risks, Environ. Sci. Technol., 31(6), 274A–279A, 1997.; Birmili, W., Schwirn, K., Nowak, A., Pet{ä}j{ä}, T., Joutsensaari, J., Rose, D., Wiedensohler, A., H{ä}meri, K., Aalto, P., Kulmala, M., and Boy, M.: Hygroscopic growth of atmospheric particle number size distributions in the Finnish boreal forest region, Boreal Environ. Res., in press, 2009.; Brüggemann, E. and Rolle, W.: Changes of some components of precipitation in East Germany after the unification, Water Air Soil Poll., 107, 1–23, 1998.; Cao, J. J., Lee, S. C., Ho, K. F., Zhang, X. Y., Zou, S. C., Fung, K., Chow, J. C., and Watson, J. G.: Characteristics of carbonaceous aerosol in Pearl River Delta Region, China during 2001 winter period, Atmos. Environ., 37(11), 1451–1460, 2003.; Charlson, R. J. and Heintzenberg, J.: Aerosol forcing of climate, John Wiley and Sons Ltd., New York, 416 pp., 1995.; Cheng, Y. F., Wiedensohler, A., Eichler, H., Heintzenberg, J., Tesche, M., Ansmann, A., Wendisch, M., Su, H., Althausen, D., Herrmann, H., Gnauk, T., Brüggemann, E., Hu, M., and Zhang, Y. H.: Relative humidity dependence of aerosol optical properties and direct radiative forcing in the surface boundary layer at Xinken in Pearl River Delta of China: An observation based numerical study Atmos. Environ., 42, 6373–6397, 2009.; Cocker, D., Whitlock, N., Flagan, R., and Seinfeld, J. H.: Hygroscopic properties of Pasadena, California aerosol, Aerosol Sci. Tech., 35(2), 637–647, 2001.; Draxler, R. R. and Hess, G. D.: Description of the HYSPLIT-4 modeling system, NOAA Technical Memorandum ERL ARL-224, 25 pp., 2004.; Eichler, H., Cheng, Y. F., Birmili, W., Nowak, A., Wiedensohler, A., Brüggemann, E., Gnauk, T., Herrmann, H., Althausen, D., Ansmann, A., Engelmann, R., Tesche, M., Wendisch, M., Zhang, Y. H., Hu, M., Liu, S., and Zeng, L. M.: Hygroscopic properties and extinction of aerosol particles at ambient relative humidity in South-Eastern China, Atmos. Environ., 42, 6321–6334, 2008.; Fenger, J.: Urban air quality, Atmos. Environ., 33(29), 4877–4900, 1999.; Ferron, G., Karg, E., Busch, B., and Heyder, J.: Ambient particles at an urban, semi-urban and rural site in Central Europe: Hygroscopic properties, Atmos. Environ., 39(2), 343–352, 2005.; Jinhuan, Q. and Liquan, Y.: Variation characteristics of atmospheric aerosol optical depths and visibility in North China during 1980–1994, Atmos. Environ., 34(4), 603–609, 2000.; Mage, D., Ozolins, G., Peterson, P., Webster, A., Orthofer, R., Vandeweerd, V., and Gwynne, M.: Urban air pollution in megacities of the world, Atmos. Environ., 30(5), 681–686, 1996.; Marple, V. A., Rubow, K. L., and Behm, S. M.: A Microorifice Uniform Deposit Impactor (MOUDI): Description, calibration, and use, Aerosol Sci. Tech., 14, 434–446, 1991.; Massling, A., Stock, M., Wehner, B., Wu, Z. J., Hu, M., Brüggemann, E., Gnauk, T., Herrmann, H., and Wiedensohler, A.: Size segregated water uptake of the urban submicrometer aerosol in Beijing, Atmos. Environ., 43(8), 1578–1589, 2009.; Massling, A., Stock, M. and Wiedensohler, A.: Diurnal, weekly, and seasonal variation of hygroscopic properties of submicrometer urban aerosol particles, Atmospheric Environment, 39, 3911-3922, 2005.; Ma{ß}ling, A., Wiedensohler, A., Busch, B., Neusü{ß}, C.

 

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