AN INNOVATIVE APPROACH TO MEASURE AEROSOL HYGROSCOPICITY USING SINGLE NEPHELOMETER SET-UP SYSTEM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F24%3A00601381" target="_blank" >RIV/67985858:_____/24:00601381 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/86652079:_____/24:00601509

Výsledek na webu

<a href="https://hdl.handle.net/11104/0358538" target="_blank" >https://hdl.handle.net/11104/0358538</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

AN INNOVATIVE APPROACH TO MEASURE AEROSOL HYGROSCOPICITY USING SINGLE NEPHELOMETER SET-UP SYSTEM

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

AN INNOVATIVE APPROACH TO MEASURE AEROSOL HYGROSCOPICITY USING SINGLE NEPHELOMETER SET-UP SYSTEM

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

PROCEEDINGS OF 23rd Annual Conference of the Czech Aerosol Society OVZDUŠÍ V ČASe

ISBN

978-80-908653-2-7

ISSN

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e-ISSN

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Počet stran výsledku

3

Strana od-do

42-44

Název nakladatele

Czech Aerosol Society

Místo vydání

Prague

Místo konání akce

Milovy

Datum konání akce

11. 11. 2024

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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