Articles | Volume 17, issue 14
https://doi.org/10.5194/acp-17-8923-2017
https://doi.org/10.5194/acp-17-8923-2017
Research article
 | 
25 Jul 2017
Research article |  | 25 Jul 2017

Evaporation of sulfate aerosols at low relative humidity

Georgios Tsagkogeorgas, Pontus Roldin, Jonathan Duplissy, Linda Rondo, Jasmin Tröstl, Jay G. Slowik, Sebastian Ehrhart, Alessandro Franchin, Andreas Kürten, Antonio Amorim, Federico Bianchi, Jasper Kirkby, Tuukka Petäjä, Urs Baltensperger, Michael Boy, Joachim Curtius, Richard C. Flagan, Markku Kulmala, Neil M. Donahue, and Frank Stratmann

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Cited articles

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Bollas, G. M., Chen, C.-C., and Barton, P. I.: Refined electrolyte–NRTL model: activity coefficient expressions for application to multi–electrolyte systems, AIChE J., 54, 1608–1624, 2008.
Brock, C. A., Hamill, P., Wilson, J. C., Jonsson, H. H., and Chan, K. R.: Particle Formation in the Upper Tropical Troposphere: A Source of Nuclei for the Stratospheric Aerosol, Science, 270, 1650–1653, 1995.
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The H2SO4 vapour pressure plays key role in Earth's and Venus' atmospheres. In regions where RH is low and stabilising bases are scarce, H2SO4 can evaporate from particles; however the H2SO4 vapour pressure at low RH is uncertain. To address this, we measured H2SO4 evaporation versus T and RH in the CLOUD chamber and constrained the equilibrium constants for dissociation and dehydration of H2SO4. This study is important for nucleation, particle growth and H2SO4 formation occurring in atmosphere.
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