Název: An Innovative Approach To Measure Aerosol Hygroscopicity Using Single Nephelometer Set-Up System
Autoři: Suchánková, Lenka ; Ondráček, J. ; Roztočil, P. ; Prokeš, Roman ; Holoubek, Ivan ; Ždímal, V.
Typ dokumentu: Příspěvky z konference
Konference/Akce: SBORNÍK XXIII. výroční konference České aerosolové společnosti OVZDUŠÍ V ČASe, Milovy (CZ), 20241111
Rok: 2024
Jazyk: eng
Abstrakt: Hygroscopicity can be defined as the ability of aerosol particles to take up water molecules from the surrounding environment. This property affects the size, refractive index, chemical composition, and optical properties of the particles, as well as the formation and properties of clouds. The dependence of certain types of particles on relative humidity (RH) represents a critical factor in estimating the uncertainty of the direct and indirect effects of aerosols on the climate (Burgos et al., 2019, Titos et al., 2021). One of the conventional methods for measuring aerosol hygroscopicity of aerosols is the observation of changes in light scattering properties with RH using an integrating nephelometer (IN). It is common practice to utilize a setup comprising one IN at dry and another at humidified conditions in parallel or in series (Titos et al., 2016). The outcome of such a measurement is the enhancement factor f(RH), defined as the ratio of the \nscattering coefficient σsp under humidified (>80%) and under dry conditions (<40%). However, the use of multiple instruments in such setups may lead to over- or underestimation of the f(RH). Furthermore, there is a lack of information about aerosol hygroscopic properties at European urban sites.
Klíčová slova: aerosol optical properties; cattering enhancement; relative humidity
Číslo projektu: LM2023048 (CEP), LM2023030 (CEP)
Poskytovatel projektu: GA MŠk, GA MŠk
Zdrojový dokument: PROCEEDINGS OF 23rd Annual Conference of the Czech Aerosol Society OVZDUŠÍ V ČASe, ISBN 978-80-908653-2-7

Instituce: Ústav výzkumu globální změny AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0358675

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-668335