ACP Atmospheric Chemistry and Physics ACP Atmos. Chem. Phys. 1680-7324 Copernicus Publications GΓΆttingen, Germany 10.5194/acp-9-7519-2009 Observational study of influence of aerosol hygroscopic growth on scattering coefficient over rural area near Beijing mega-city Pan X. L. 1 2 3 Yan P. 1 Tang J. 1 Ma J. Z. 1 Wang Z. F. 2 Gbaguidi A. 2 Sun Y. L. 2 Chinese Academy of Meteorological Science, China Meteorological Administration, Beijing, China Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China Graduate University of Chinese Academy of Sciences, Beijing, China 09 10 2009 9 19 7519 7530 Copyright: © 2009 X. L. Pan et al. 2009 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://acp.copernicus.org/articles/9/7519/2009/acp-9-7519-2009.html The full text article is available as a PDF file from https://acp.copernicus.org/articles/9/7519/2009/acp-9-7519-2009.pdf

We investigated aerosol hygroscopic growth property and its influence on scattering coefficient using M9003 nephelometers in coupling with humidity controlled inlet system at a rural site near Beijing mega-city from 24 April to 15 May 2006. Inlet relative humidity was controlled in an increasing range of 40%–90% while aerosol hygroscopic growth factor of scattering coefficient, <i>f</i>(RH=80%) as ratio of scattering coefficient at RH=80% to "dry" scattering coefficient (RH<40%) varied in a range of 1.07–2.35 during the measurement. Further analysis indicated that under dust episode, measured <i>f</i>(RH=80%) is 1.2&plusmn;0.02, and estimated periodic mean value of <i>f</i>(RH=80%) was 1.31&plusmn;0.03 under clean periods; during urban pollution periods, the aerosol displayed relative strong water absorbing properties with <i>f</i>(RH=80%) of about 1.57&plusmn;0.02. An examination of chemical composition of daily filter samples highlighted that aerosol hygroscopicity was generally depressed with the increasing ratio of organic matter (OMC)/ammonium sulfate (AS) in particle mass, similar with the results of many previous studies. However, a special case with high value of <i>f</i>(RH=80%)=2.21 and high OMC/AS ratio was also observed, this exception reflected physico-chemical particularities of organic matter and its complex interaction with other compounds during this episode.

 References Aklilu, Y., Mozurkewich, M., Prenni, A. J., et al.: Hygroscopicity of particles at two rural, urban influenced sites during Pacific 2001: Comparison with estimates of water uptake from particle composition, Atmos. Environ., 40(15), 2650–2661, 2006. Berg, O. H., Swietlicki, E., and Krejci, R.: Hygroscopic growth of aerosol particles in the marine boundary layer over the Pacific and Southern Oceans during the First Aerosol Characterization Experiment (ACE 1), J. Geophys. Res.-Atmos., 103(D13), 16535-–16545, 1998. Bergin, M. H., Cass, G. R., Xu, J., et al.: Aerosol radiative, physical, and chemical properties in Beijing during June 1999, J. Geophys. Res., 106(D16), 17969–17980, 2001. Bohren, C. F. and Huffman, D. R.: Absorption and scattering of light by small particles, Wiley, New York, 1983. Carrico, C. M., Kreidenweis, S. M., Malm, W. C., et al.: Hygroscopic growth behavior of a carbon-dominated aerosol in Yosemite National Park, Atmos. Environ., 39(8), 1393–1404, 2005. Carrico, C. M., Kus, P., Rood, M. J., et al.: Mixtures of pollution, dust, sea salt, and volcanic aerosol during ACE-Asia: Radiative properties as a function of relative humidity, J. Geophys. Res., 108(D23), 8650, https://doi.org/10.1029/2003JD003405, 2003. Carrico, C. M., Rood, M. J., and Ogren, J. A.: Aerosol light scattering properties at Cape Grim, Tasmania, during the First Aerosol Characterization Experiment (ACE&nbsp;1), J. Geophys. Res., 103(D13), 16565–16574, 1998. Carrico, C. M., Rood, M. J., Ogren, J. A., et al.: Aerosol Optical properties at Sagres, Portugal during ACE-2, Tellus B, 52(2), 694–715, 2000. Chan, C. Y., Xu, X. D., Li, Y. S., et al.: Characteristics of vertical profiles and sources of PM<sub>2.5</sub>, PM<sub>10</sub> and carbonaceous species in Beijing, Atmos. Environ., 39(28), 5113–5124, 2005. Charlson, R. J., Langner, J., Rodhe, H., et al.: Perturbation of the Northern Hemisphere radiative balance by backscattering from anthropogenic sulfate aerosols*, Tellus B, 43(4), 152–163, 1991. Chen, L. Y., Jeng, F. T., Chen, C. C., et al.: Hygroscopic behavior of atmospheric aerosol in Taipei, Atmos. Environ., 37(15), 2069–2075, 2003. Choi, M. Y. and Chan, C. K.: The Effects of Organic Species on the Hygroscopic Behaviors of Inorganic Aerosols, Environ. Sci. Technol., 36(11), 2422–2428, 2002. Covert, D. S., Charlson, R. J., and Ahlquist, N. C.: A study of the relationship of chemical compositon and humdity to light scattering by aerosols, J. Appl. Meteorol., 11, 968–976, 1972. Crumeyrolle, S., Gomes, L., Tulet, P., Matsuki, A., Schwarzenboeck, A., and Crahan, K.: Increase of the aerosol hygroscopicity by cloud processing in a mesoscale convective system: a case study from the AMMA campaign, Atmos. Chem. Phys., 8, 6907–6924, 2008. Cruz, C. N. and Pandis, S. N.: Deliquescence and Hygroscopic Growth of Mixed Inorganic-Organic Atmospheric Aerosol, Environ. Sci. Technol., 34(20), 4313–4319, 2000. Day, D. E. and Malm, W. C.: Aerosol light scattering measurements as a function of relative humidity, J. Air Waste Manage., 50(5), 710–716, 2000. Dinar, E., Taraniuk, I., Graber, E. R., et al.: Hygroscopic growth of atmospheric and model humic-like substances, J. Geophys. Res.-Atmos., 112, D05211, https://doi.org/10.1029/2006JD007442, 2007. Draxler, R. R. and Hess, G. D.: An overview of the HYSPLIT{_}4 modelling system for trajectories, dispersion, and deposition, Aust. Meteorol. Mag., 47(4), 295–308, 1998. Duan, F., Liu, X., Yu, T., et al.: Identification and estimate of biomass burning contribution to the urban aerosol organic carbon concentrations in Beijing, Atmos. Environ., 38(9), 1275–1282, 2004. Ferron, G. A., Karg, E., Busch, B., et al.: Ambient particles at an urban, semi-urban and rural site in Central Europe: hygroscopic properties, Atmos. Environ., 39(2), 343–352, 2005. Garland, R. M., Ravishankara, A. R., Lovejoy, E. R., et al.: Parameterization for the relative humidity dependence of light extinction: Organic-ammonium sulfate aerosol, J. Geophys. Res.-Atmos., 112, D19303, https://doi.org/10.1029/2006JD008179, 2007. Gouesbet, G.: Generalized Lorenz-Mie theory and applications, Part. Part. Syst. Char., 11(1), 22–34, 1994. Gysel, M., Crosier, J., Topping, D. O., Whitehead, J. D., Bower, K. N., Cubison, M. J., Williams, P. I., Flynn, M. J., McFiggans, G. B., and Coe, H.: Closure study between chemical composition and hygroscopic growth of aerosol particles during TORCH2, Atmos. Chem. Phys., 7, 6131–6144, 2007. Gysel, M., Weingartner, E., and Baltensperger, U.: Hygroscopicity of Aerosol Particles at Low Temperatures. 2. Theoretical and Experimental Hygroscopic Properties of Laboratory Generated Aerosols, Environ. Sci. Technol., 36(1), 63–68, 2002. Hand, J. L. and Malm, W. C.: Review of the IMPROVE Equation for Estimating Ambient Light Extinction Coefficients-Final Report, 47, 2006. Harris, J. M. and Kahl, J. D. W.: Analysis of 10-day isentropic flow patterns for Barrow, Alaska: 1985–1992, J. Geophys. Res., 99(D12), 25845-–25855, 1994. He, K., Yang, F., Ma, Y., et al.: The characteristics of PM<sub>2.5</sub> in Beijing, China, Atmos. Environ., 35(29), 4959–4970, 2001. Herich, H., Kammermann, L., Gysel, M., et al.: In situ determination of atmospheric aerosol composition as a function of hygroscopic growth, J. Geophys. Res.-Atmos., 113, D16213, https://doi.org/10.1029/2008JD009954, 2008. Houghton, J. T., Ding, Y., Griggs, D. J., et al.: IPCC, 2001: Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, 2001. Kim, J., Yoon, S. C., Jefferson, A., et al.: Aerosol hygroscopic properties during Asian dust, pollution, and biomass burning episodes at Gosan, Korea in April 2001, Atmos. Environ., 40(8), 1550–1560, 2006. Koloutsou-Vakakis, S., Carrico, C. M., Kus, P., et al.: Aerosol properties at a midlatitude Northern Hemisphere continental site, J. Geophys. Res., 106(D3), 3019–3032, 2001. Kotchenruther, R. A. and Hobbs, P. V.: Humidification factors of aerosols from biomass burning in Brazil, J. Geophys. Res., 103(D24), 32081–32090, 1998. Kotchenruther, R. A., Hobbs, P. V., and Hegg, D. A.: Humidification factors for atmospheric aerosols off the mid-Atlantic coast of the United States, J. Geophys. Res., 104(D2), 2239–2252, 1999. Larson, S. M., Cass, G. R., Hussey, K. J., et al.: Verification of image processing based visibility models, Environ. Sci. Technol., 22(6), 629–637, 1988. Li-Jones, X., Maring, H. B., and Prospero, J. M.: Effect of relative humidity on light scattering by mineral dust aerosol as measured in the marine boundary layer over the tropical Atlantic Ocean, J. Geophys. Res., 103(D23), 31113-–31121, 1998. Liu, X., Cheng, Y., Zhang, Y., et al.: Influences of relative humidity and particle chemical composition on aerosol scattering properties during the 2006 PRD campaign, Atmos. Environ., 42(7), 1525–1536, 2007. Magi, B. I. and Hobbs, P. V.: Effects of humidity on aerosols in southern Africa during the biomass burning season, J. Geophys. Res.-Atmos., 108(D13), 8495, https://doi.org/10.1029/2002JD002144, 2003. Malm, W. C. and Day, D. E.: Estimates of aerosol species scattering characteristics as a function of relative humidity, Atmos. Environ., 35(16), 2845–2860, 2001. Malm, W. C., Day, D. E., Carrico, C., et al.: Intercomparison and closure calculations using measurements of aerosol species and optical properties during the Yosemite Aerosol Characterization Study, J. Geophys. Res.-Atmos., 110, D14302, https://doi.org/10.1029/2004JD005494, 2005. Malm, W. C., Day, D. E., Kreidenweis, S. M., et al.: Hygroscopic properties of an organic-laden aerosol, Atmos. Environ., 39(27), 4969–4982, 2005. McMurry, P. H. and Zhang, X.: Issues in aerosol measurement for optics assessments, J. Geophys. Res.-Atmos., 101(D14), 19189–19197, 1996. Meszaros, E., Molnar, A., and Ogren, J.: Scattering and absorption coefficients vs. chemical composition of fine atmospheric aerosol particles under regional conditions in Hungary, J. Aerosol Sci., 29(10), 1171–1178, 1998. Pagels, J., Strand, M., Rissler, J., et al.: Characteristics of aerosol particles formed during grate combustion of moist forest residue, J. Aerosol Sci., 34(8), 1043–1059, 2003. Perry, K. D., Cliff, S. S., and Jimenez-Cruz, M. P.: Evidence for hygroscopic mineral dust particles from the Intercontinental Transport and Chemical Transformation Experiment, J. Geophys. Res., 109, D23S28, https://doi.org/10.1029/2004JD004979, 2004. Qiu, J., Yang, L., and Zhang, X.: Characteristics of the imaginary part and single-scattering albedo of urban aerosols in northern China, Tellus B, 56(3), 276–284, 2004. Randles, C. A., Russell, L. M., and Ramaswamy, V.: Hygroscopic and optical properties of organic sea salt aerosol and consequences for climate forcing, Geophys. Res. Lett., 31, L16108, https://doi.org/10.1029/2004GL020628, 2004. Rissler, J., Swietlicki, E., Zhou, J., Roberts, G., Andreae, M. O., Gatti, L. V., and Artaxo, P.: Physical properties of the sub-micrometer aerosol over the Amazon rain forest during the wet-to-dry season transition – comparison of modeled and measured CCN concentrations, Atmos. Chem. Phys., 4, 2119–2143, 2004. Santarpia, J. L., Gasparini, R., Li, R., et al.: Diurnal variations in the hygroscopic growth cycles of ambient aerosol populations, J. Geophys. Res., 110, D03206, https://doi.org/10.1029/2004JD005279, 2005. Saxena, P., Hildemann, L. M., McMurry, P. H., et al.: Organics alter hygroscopic behavior of atmospheric particles, J. Geophys. Res., 100(D9), 18755–18770, 1995. Shi, Z., Zhang, D., Hayashi, M., et al.: Influences of sulfate and nitrate on the hygroscopic behaviour of coarse dust particles, Atmos. Environ., 42(4), 822–827, 2007. Sun, Y., Zhuang, G., Wang, Y., et al.: The air-borne particulate pollution in Beijing – concentration, composition, distribution and sources, Atmos. Environ., 38(35), 5991–6004, 2004. Tang, I. N.: Chemical and size effects of hygroscopic aerosols on light scattering coefficients, J. Geophys. Res., 101(D14), 19245–19250, 1996. Turpin, B. J. and Lim, H. J.: Species contributions to PM<sub>2.5</sub> mass concentrations: Revisiting common assumptions for estimating organic mass, Aerosol Sci. Tech., 35(1), 602–610, 2001. Van De Hulst, H. C.: Light scattering by small particles, Courier Dover Publications, 160, 1981. Virkkula, A., Van Dingenen, R., Raes, F., et al.: Hygroscopic properties of aerosol formed by oxidation of limonene, alpha-pinene, and beta-pinene, J. Geophys. Res., 104(D3), 3569–3580, 1999. Vlasenko, A., Sj\"ΓΈgren, S., Weingartner, E., et al.: Generation of submicron Arizona test dust aerosol: Chemical and hygroscopic properties, Aerosol Sci. Tech., 39(5), 452–460, 2005. Wang, Y., Zhuang, G., Tang, A., et al.: The evolution of chemical components of aerosols at five monitoring sites of China during dust storms, Atmos. Environ., 41(5), 1091–1106, 2007. Wise, M. E., Surratt, J. D., Curtis, D. B., et al.: Hygroscopic growth of ammonium sulfate/dicarboxylic acids, J. Geophys. Res.-Atmos., 108(D20), 4638, https://doi.org/10.1029/2003JD003775, 2003. Xu, J., Bergin, M. H., Yu, X., et al.: Measurement of aerosol chemical, physical and radiative properties in the Yangtze delta region of China, Atmos. Environ., 36(2), 161–173, 2002. Yamato, M. and Tanaka, H.: Aircraft observations of aerosols in the free marine troposphere over the North Pacific Ocean: particle chemistry in relation to air mass origin, J.Geophys. Res., 99(D3), 5353–5377, 1994. Yan, P., Pan, X., Tang, J., et al.: Hygroscopic growth of aerosol scattering coefficient: A comparative analysis between urban and suburban sites at winter in Beijing. Particuology, 7(1), 52–60, 2009. Yan, P., Pan, X. L., Tang, J., et al.: An experimental study on the influence of relative humidity on the atmospheric aerosol scattering coeff icient at an urban site in Beijing, Acta Meteorol. Sin., 6(1), 11–119, 2008. Yan, P., Tang, J., Huang, J., Mao, J. T., Zhou, X.J., Liu, Q., Wang, Z. F., and Zhou, H. G.: The measurement of aerosol optical properties at a rural site in Northern China, Atmos. Chem. Phys., 8, 2229–2242, 2008. Yang, F., He, K., Ye, B., Chen, X., Cha, L., Cadle, S. H., Chan, T., and Mulawa, P. A.: One-year record of organic and elemental carbon in fine particles in downtown Beijing and Shanghai, Atmos. Chem. Phys., 5, 1449–1457, 2005. Zhang, D. and Iwasaka, Y.: Nitrate and sulfate in individual Asian dust-storm particles in Beijing, China in Spring of 1995 and 1996, Atmos. Environ., 33(19), 3213–3223, 1999. Zhang, D., Iwasaka, Y., Shi, G., et al.: Mixture state and size of Asian dust particles collected at southwestern Japan in spring 2000, J. Geophys. Res., 108(D24), 4760, https://doi.org/10.1029/2003JD003869, 2003. Zhou, J., Swietlicki, E., Berg, O. H., et al.: Hygroscopic properties of aerosol particles over the central Arctic Ocean during summer, J. Geophys. Res.-Atmos., 106(D23), 32111-–32123, 2001.