Approximated expression of the hygroscopic growth factor for polydispersed aerosols
- 주제(키워드) Analytical approximated expression , Polydispersed aerosol , Hygroscopic growth factor , Aerosol size distribution , Scattering enhancement factor
- 주제(기타) Engineering, Chemical
- 주제(기타) Engineering, Mechanical
- 주제(기타) Environmental Sciences
- 주제(기타) Meteorology & Atmospheric Sciences
- 설명문(일반) [Jung, Chang H.] Kyungin Womens Univ, Dept Hlth Management, Incheon 21041, South Korea; [Yoon, Young Jun] Korea Polar Res Inst, Incheon 21990, South Korea; [Um, Junshik] Pusan Natl Univ, Dept Atmospher Sci, Busan 46241, South Korea; [Lee, Seoung Soo] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA; [Han, Kyung Man] Gwangju Inst Sci & Technol, Sch Earth Sci & Environm Engn, Gwangju 61005, South Korea; [Shin, Hye Jung] Natl Inst Environm Res, Climate & Air Qual Res Dept, Incheon 22689, South Korea; [Lee, Ji Yi] Ewha Womans Univ, Dept Environm Sci & Engn, Seoul 03760, South Korea; [Kim, Yong Pyo] Ewha Womans Univ, Dept Chem Engn & Mat Sci, Seoul 03760, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- OA유형 hybrid
- 발행기관 ELSEVIER SCI LTD
- 발행년도 2021
- URI http://www.dcollection.net/handler/ewha/000000175084
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.jaerosci.2020.105670
초록/요약
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.
more