References

ACPD

Atmospheric Chemistry and Physics Discussions

ACPD

1680-7375

Copernicus GmbH

Göttingen, Germany

10.5194/acpd-7-13773-2007

Hygroscopic growth and activation of HULIS particles: experimental data and a new iterative parameterization scheme for complex aerosol particles

Ziese

¹ Wex

¹ Nilsson

² Salma

³ Ocskay

³ Hennig

¹ Massling

¹ Stratmann

Leibniz-Intitute for Tropospheric Research, Permoser Strasse 15, 04318 Leipzig, Germany

Lund University, Department of Nuclear Physic, P.O. Box 118, 221 00 Lund, Sweden

Eötvös University, Institute of Chemistry, P.O. Box 32, 1518 Budapest, Hungary

21 09 2007

7 5 13773 13803

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The hygroscopic growth and activation of two HULIS and one Aerosol-Water-Extract sample, prepared from urban-type aerosol, were investigated. All samples were extracted from filters, redissolved in water and atomized for the investigations presented here. The hygroscopic growth measurements were done using LACIS (Leipzig Aerosol Cloud Interaction Simulator) together with a HH-TDMA (High Humidity Tandem Differential Mobility Analyzer). Hygroscopic growth was determined for relative humidities up to 99.75%. The critical diameters for activation were measured using LACIS for supersaturations between 2 and 10 per mill. All three samples showed a similar hygroscopic growth behaviour, and the two HULIS samples also were similar in their activation behavior, while the Aerosol-Water-Extract turned out to be more CCN active than the HULIS samples. The experimental data was used to derive parameterizations for the hygroscopic growth and activation of HULIS particles. The concept of ρ<sub>ion</sub> (Wex et al., 2007a) and the Szyszkowski-equation (Szyszkowski, 1908; Facchini et al., 1999) were used for parameterizing the Raoult and the Kelvin (surface tension) terms of the Köhler equation, respectively. This concept proved to be very successful for the HULIS samples in the saturation range from relative humidities larger than 98% up to activation. However it failed for the Aerosol-Water extract.

References 1

Albrecht, B.: Aerosol, cloud microphysics, and fractional cloudiness, Science, 245, 1227–1230, 1989.

Asa-Awuku, A., Nenes, A., Sullivan, A., Hennigan, C., and Weber, R.: Investigation of molar volume and surfactant characteristics of water-soluble organic compounds in biomass burning aerosol, Atmos. Chem. Phys. Discuss., 7, 3589–3627, 2007.

Bilde, M. and Svenningsson, B.: CCN activation of slightly soluble organics: The importance of small amounts of inorganic salts and particle phase, Tellus, 56(B), 128–134, 2004.

Broekhuizen, K., Kumar, P., and Abbatt, J.: Partly soluble organics as cloud condensation nuclei: Role of trace soluble and surface active species, Geophys. Res. Lett., 31, L01107, doi:10.1029/2003GL018203, 2004.

Dinar, E., Mentel, T., and Rudich, Y.: The density of humic acids and humic like substances (HULIS) from fresh and aged wood burning and pollution aerosol particles, Atmos. Chem. Phys., 6, 5213–5224, 2006a.

Dinar, E., Taranuik, I., Graber, E., Katsman, S., Moise, T., Anttila, T., Mentel, T., and Rudich, Y.: Cloud Condensation Nuclei properties of model and atmospheric HULIS, Atmos. Chem. Phys., 6, 2465–2482, 2006b.

Dinar, E., Taraniuk, I., Graber, E., Anttila, T., Mentel, T., and Rudich, Y.: Hygroscopic growth of atmospheric and model humic-like substances, J. Geophys. Res., 112, D05211, doi:10.1029/2006JD007 442, 2007.

Facchini, M., Mircea, M., Fuzzi, S., and Charlson, R.: Cloud albedo enhancement by surface-active organic solutes in growing droplets, Nature, 401, 257–259, 1999.

Graber, E. and Rudich, Y.: Atmospheric HULIS: How humic-like are they? A comprehensive and critical review, Atmos. Chem. Phys., 6, 729–753, 2006.

Gysel, M., Weingartner, E., Nyeki, S., Paulsen, D., Baltensperger, U., Galambos, I., and Kiss, G.: Hygroscopic properties of water-soluble matter and humic-like organics in atmospheric fine aerosol, Atmos. Chem. Phys., 4, 35–50, 2004.

Hennig, T., Massling, A., Brechtel, F., and Wiedensohler, A.: A tandem DMA for highly temperature-stabilized hygroscopic particle growth measurements between 90% ans 98% relative humidity, J. Aerosol Sci., 36, 1210–1223, 2005.

Henning, S., Rosenorn, T., D'Anna, B., Gola, A., Svenningsson, B., and Bilde, M.: Cloud droplet activation and surface tension of mixtures of slightly soluble organics and inorganic salt, Atmos. Chem. Phys., 5, 575–582, 2005.

Hoffer, A., Gelencser, A., Guyon, P., Kiss, G., Schnid, O., Frank, G., Artaxo, P., and Andreae, M.: Optical properties of humic-like substances (HULIS) in biomass-burning aerosols, Atmos. Chem. Phys., 6, 3563–3570, 2006.

Kiselev, A., Wex, H., Stratmann, F., Nadeev, A., and Karpushenko, D.: White-light optical particle spectrometer for in-situ measurements of condensational growth of aerosol particles, Appl. Optics, 44, 4693–4701, 2005.

Kiss, G., Tombacz, E., and Hansson, H.-C.: Surface tension effects of humic-like substances in the aqueous extract of tropospheric fine aerosol, J. Atmos. Chem., 50, 279–294, 2005.

Köhler, H.: The nucleus in and the growth of hygroscopic droplets, T. Faraday Soc., 32, 1152–1161, 1936.

Lance, S., Medina, J., Smith, J., and Nenes, A.: Mapping the operation of the DMT continuous Flow CCN counter, Aerosol Sci. Technol., 40, 242–254, 2006.

Rader, D. and McMurry, P.: Application of the tandem differential mobility analyser to studies of droplet growth or evaporation, J. Aerosol Sci., 17, 771–787, 1986.

Salma, I., Ocskay, R., Varga, I., and Maenhaut, W.: Surface tension of atmospheric humic-like substances in connection with relaxation, dilution, and solution pH, J. Geophys. Res., 111, D23205, doi:10.1029/2005JD007 015, 2006.

Salma, I., Ocskay, R., Chi, X., and Maenhaut, W.: Sampling artefacts, concentration and chemical composition of fine water-soluble organic carbon and humic-like substances in a continental urban atmospheric environment, Atmos. Environ., 41, 4106–4118, 2007.

Samburova, V., Zenobi, R., and Kalberer, M.: Characterisation of high molecular weight compounds in urban atmospheric particles, Atmos. Chem. Phys., 5, 2163–2170, 2005.

Sorjamaa, R., Svenningsson, B., Raatikainen, T., Henning, S., Bilde, M., and Laaksonen, A.: The role of surfactants in K�hler theory reconsidered, Atmos. Chem. Phys., 4, 2107–2117, 2004.

Stratmann, F., Kiselev, A., Wurzler, S., Wendisch, M., Heintzenberg, J., Charlson, R., Diehl, K., Wex, H., and Schmidt, S.: Laboratory studies and numerical simulations of cloud droplet formation under realistic supersaturation conditions, J. Atmos. Ocean. Tech., 21, 876–887, 2004.

Szyszkowski, B.: Experimentelle Studien über kapillare Eigenschaften der wässrigen Lösungen von Fettsäuren, Z. Phys. Chem., 64, 385–414, 1908.

Tang, I.: Chemical and size effects of hygroscopic aerosols in light scattering coefficients, J. Geophys. Res., 101, 19 245–19 250, 1996.

Tang, I. and Munkelwitz, H.: Water activities, densities, and refactive indices of aqueous sulfate and sodium nitrate droplets of atmospheric importance, J. Geophys. Res., 99, 18 801–18 808, 1994.

Twomey, S.: Pollution and the planetary albedo, Atmos. Environ., 8, 1251–1256, 1974.

Varga, B., Kiss, G., Ganszky, I., Gelencser, A., and Krivacsy, Z.: Isolation of water-soluble organic matter from atmospheric aerosol, Talanta, 55, 561–572, 2001.

Wex, H., Kiselev, A., Stratmann, F., Zoboki, J., and Brechtel, F.: Measured and modeled equilibrium sizes of NaCl and (NH4)2SO4 particles at relative humidities up to 99,1%, J. Geophys. Res., 110, D21212, doi:10.1029/2004JD005507, 2005.

Wex, H., Kiselev, A., Ziese, M., and Stratmann, F.: Calibration of LACIS as a CCN detector and its use in measuring activation and hygroscopic growth of atmospheric aerosol particles, Atmos. Chem. Phys., 6, 4519–4527, 2006.

Wex, H., Hennig, T., Salma, I., Ocskay, R., Kiselev, A., Henning, S., Massling, A., Wiedensohler, A., and Stratmann, F.: hygroscopic growth and measured and modeled critical supersaturations of an atmospheric HULIS sample, Geophys. Res. Lett., 34, L02818, doi:10.1029/2006GL028 260, 2007a.

Wex, H., Ziese, M., Kiselev, A., Henning, S., and Stratmann, F.: Deliquescence and hygroscopic growth of succinic acid particles measured with LACIS, Geophys. Res. Lett., L17810, doi:10.1029/2007GL030 185, 2007b.