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Approximated expression of the hygroscopic growth factor for polydispersed aerosols

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Cited 1 time in scopus
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Approximated expression of the hygroscopic growth factor for polydispersed aerosols
Other Titles
다중크기분포 에어로졸의 흡습성 예측
Jung, Chang H.
Yoon, Young Jun
Um, Junshik
Lee, Seoung Soo
Han, Kyung Man
Shin, Hye Jung
Lee, Ji Yi
Kim, Yong Pyo
Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
Analytical approximated expression; Polydispersed aerosol; Hygroscopic growth factor; Aerosol size distribution; Scattering enhancement factor
Issue Date
Jung, Chang H., et al. 2021. "Approximated expression of the hygroscopic growth factor for polydispersed aerosols". JOURNAL OF AEROSOL SCIENCE, 151(1): 105670-105682.
Hygroscopic growth of aerosols plays an important role in the characterization of atmospheric aerosols. Physico-chemical and optical properties of aerosols are dependent on relative humidity (RH) as well as on their size and composition. In this study, scattering enhancement factors, f(RH), for polydispersed aerosols were approximated. f(RH) of ammonium sulfate and ammonium nitrate (AS) and NaCl aerosols (ss) were considered under the assumption of externally mixed aerosols. f(RH) was calculated using the Mie theory for polydispersed aerosols at a given RH and corresponding water uptake (denoted as fMie(RH)). f(RH) was approximated as a quadratic function of RH (denoted as fapp(RH)). The obtained approximated f(RH) or fapp(RH)) values were compared with the values based on the Mie theory and showed a reasonable agreement between them. To the best of our knowledge, this is the first study that parametrizes the size dependency of f(RH) for log normally distributed aerosols.
Appears in Collections  
2020-2020, Arctic permafrost environment change monitoring and prediction method developments (20-20) / Lee, Bang Yong (PN20081)
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