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Original title:
AN INNOVATIVE APPROACH TO MEASURE AEROSOL HYGROSCOPICITY USING SINGLE NEPHELOMETER SET-UP SYSTEM
Authors: Suchánková, Lenka ; Ondráček, Jakub ; Roztočil, Petr ; Prokeš, R. ; Holoubek, I. ; Ždímal, Vladimír
Document type: Papers
Conference/Event: SBORNÍK XXIII. výroční konference České aerosolové společnosti OVZDUŠÍ V ČASe, Milovy (CZ), 20241111
Year: 2024
Language: eng
Abstract: 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. 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. The outcome of such a measurement is the enhancement factor f(RH), defined as the ratio of the scattering 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.
Keywords: aerosol optical properties; relative humidity; scattering enhancement
Project no.: LM2023030 (CEP)
Funding provider: GA MŠk
Host item entry: PROCEEDINGS OF 23rd Annual Conference of the Czech Aerosol Society OVZDUŠÍ V ČASe, ISBN 978-80-908653-2-7
Note: Související webová stránka: https://hdl.handle.net/11104/0358538
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.
Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Original record: https://hdl.handle.net/11104/0358538
Permalink: http://www.nusl.cz/ntk/nusl-668323
The record appears in these collections:
Research > Institutes ASCR > Institute of Chemical Process Fundamentals
Conference materials > Papers
Authors: Suchánková, Lenka ; Ondráček, Jakub ; Roztočil, Petr ; Prokeš, R. ; Holoubek, I. ; Ždímal, Vladimír
Document type: Papers
Conference/Event: SBORNÍK XXIII. výroční konference České aerosolové společnosti OVZDUŠÍ V ČASe, Milovy (CZ), 20241111
Year: 2024
Language: eng
Abstract: 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. 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. The outcome of such a measurement is the enhancement factor f(RH), defined as the ratio of the scattering 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.
Keywords: aerosol optical properties; relative humidity; scattering enhancement
Project no.: LM2023030 (CEP)
Funding provider: GA MŠk
Host item entry: PROCEEDINGS OF 23rd Annual Conference of the Czech Aerosol Society OVZDUŠÍ V ČASe, ISBN 978-80-908653-2-7
Note: Související webová stránka: https://hdl.handle.net/11104/0358538
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.
Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Original record: https://hdl.handle.net/11104/0358538
Permalink: http://www.nusl.cz/ntk/nusl-668323
The record appears in these collections:
Research > Institutes ASCR > Institute of Chemical Process Fundamentals
Conference materials > Papers
Record created 2024-11-26, last modified 2024-11-26
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