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A Single Parameter Representation of Hygroscopic Growth and Cloud Condensation Nucleus Activity – Part 2: Including Solubility : Volume 8, Issue 2 (25/03/2008)

By Petters, M. D.

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Book Id: WPLBN0003986132
Format Type: PDF Article :
File Size: Pages 17
Reproduction Date: 2015

Title: A Single Parameter Representation of Hygroscopic Growth and Cloud Condensation Nucleus Activity – Part 2: Including Solubility : Volume 8, Issue 2 (25/03/2008)  
Author: Petters, M. D.
Volume: Vol. 8, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2008
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description
Description: Department of Atmospheric Science, Colorado State University, CO, USA. The ability of a particle to serve as a cloud condensation nucleus in the atmosphere is determined by its size, hygroscopicity and its solubility in water. Usually size and hygroscopicity alone are sufficient to predict CCN activity. Single parameter representations for hygroscopicity have been shown to model successfully complex, multicomponent particles types. Under the assumption of either complete solubility, or complete insolubility of a component, it is not necessary to explicitly include that components solubility into the single parameter framework. This is not the case if sparingly soluble particles are present. In this work we explicitly account for solubility by modifying the single parameter equations. We demonstrate that sensitivity to the actual value of solubility emerges only in the narrow regime of 1×10−1–5×10−3, where the solubility values are expressed as volume of solute per unit volume of water present in a saturated solution. Since only a few pure compounds fall inside this sparingly soluble envelope and those only make up a small fraction of the total organic fraction most organic species in the atmospheric aerosol can be adequately modeled assuming they are either infinitely soluble in water or completely insoluble .

Summary
A single parameter representation of hygroscopic growth and cloud condensation nucleus activity – Part 2: Including solubility

Excerpt
Asa-Awuku, A. and Nenes, A.: Effect of solute dissolution kinetics on cloud droplet formation: Extended köhler theory, J. Geophys. Res., 112, D22201, doi:10.1029/2005JD006934, 2007.; Bilde, M. and Svenningsson, B.: CCN activation of slightly soluble organics: The importance of small amounts of inorganic salt and particle phase, Tellus, 56B, 128–134, 2004.; Hori, M., Ohta, S., Murao, N., and Yamagata, S.: Activation capability of water soluble organic substances as CCN, J. Aerosol Sci., 34, 419–448, 2003.; Broekhuizen, K., Kumar, P. P., and Abbatt, J. P. D.: Partially soluble organics as cloud condensation nuclei: Role of trace soluble and surface active species, Geophys. Res. Lett., 31, L01107, doi:10.1029/2003GL018203, 2004.; Henning, S., Rosenorn, T., D'Anna, B., Gola, A. 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.; Kelly, J. T., Chuang, C. C., and Wexler, A. S.: Influence of dust composition on cloud droplet formation, Atmos. Environ., 41, 2904–2916, 2007.; Kreidenweis, S. M., Petters, M. D., and DeMott, P. J.: Deliquescence-controlled activation of organic aerosols, Geophys. Res. Lett., 33, L06801, doi:10.1029/2005GL024863, 2006.; Laaksonen, A., Korhonen, P., Kulmala, M., and Charlson, R. J.: Modification of the Köhler equation to include soluble trace gases and slightly soluble substances, J. Atmos. Sci., 55, 853–862, 1998.; Padró, L. T. and Nenes, A.: Cloud droplet activation: solubility revisited, Atmos. Chem. Phys. Discuss., 7, 2325–2355, 2007.; Petters, M. D. and Kreidenweis, S. M.: A single parameter representation of aerosol hygroscopicity and cloud condensation nucleus activity, Atmos. Chem. Phys., 7, 1961–1971, 2007.; Raymond, T. M. and Pandis, S. N.: Formation of cloud droplets by multicomponent organic particles, J. Geophys. Res., 108, 4469, doi:10.1029/2003JD003503, 2003.; Shulman, M. L., Jacobson, M. C., Carlson, R. J., Synovec, R. E., and Young, T. E.: Dissolution behavior and surface tension effects of organic compounds in nucleating cloud droplets, Geophys. Res. Lett., 23, 277–280, 1996.; VanReken, T. M., Ng, N. L., Flagan, R. C., and Seinfeld, J. H.: Cloud condensation nucleus activation properties of biogenic secondary organic aerosol, J. Geophy. Res., 110, D07206, doi:10.1029/2004JD005465, 2005.; Ziese, M., Wex, H., Nilsson, E. D., Salma, I., Ocskay, R., Hennig, T., Massling, A., and Stratmann, F.: Hygroscopic growth and activation of HULIS particles: Experimental data and a new iterative parameterization scheme for complex aerosol particles, Atmos. Chem. Phys. Discuss., 7, 13 773–13 803, 2007.

 

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