Parameterization of polydisperse aerosol optical properties during hygroscopic growth

Chang H. Jung, Kyung Man Han, Young Jun Yoon, Dongchul Kim, Ji Yi Lee, Hyung Min Lee, Junshik Um, Seoung Soo Lee, Yong Pyo Kim

Research output: Contribution to journalArticlepeer-review


Aerosol water uptake and the related influence on its optical properties owing to the hygroscopic growth of polydisperse aerosols have a significant effect on air quality and climate. This study develops an analytical parameterization for a single hygroscopic optical parameter and the scattering enhancement factor for polydisperse aerosol sizes. Polydisperse lognormal size distributions for geometric mean diameters of 0.05–1 µm and geometric standard deviations of 1.3–2.5 are considered with real refractive indices between 1.35 and 1.6. The analytical expression obtained for the optical parameter is compared to Mie theory and reasonable agreements within the size range investigated in this study are observed. Further, our results show that the analytical expression could express polydispersed aerosol optical properties as a function of geometric mean diameter and geometric standard deviation of a lognormal distribution and the refractive index. The obtained analytical expression can be efficiently used for 3D models with a reduced computational burden.

Original languageEnglish
Pages (from-to)713-726
Number of pages14
JournalAerosol Science and Technology
Issue number8
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023 American Association for Aerosol Research.


  • Hans Moosmüller


Dive into the research topics of 'Parameterization of polydisperse aerosol optical properties during hygroscopic growth'. Together they form a unique fingerprint.

Cite this