SEVEN-YEARS BASED CHARACTERISATION OF AEROSOL LIGHT SCATTERING PROPERTIES AT CENTRAL EUROPEAN RURAL SITE: VARIABILITY AND SOURCE APPORTIONMENT

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020699%3A_____%2F23%3AN0000007" target="_blank" >RIV/00020699:_____/23:N0000007 - isvavai.cz</a>

Výsledek na webu

<a href="http://cas.icpf.cas.cz/download/Sbornik_VKCAS_2022.pdf" target="_blank" >http://cas.icpf.cas.cz/download/Sbornik_VKCAS_2022.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

SEVEN-YEARS BASED CHARACTERISATION OF AEROSOL LIGHT SCATTERING PROPERTIES AT CENTRAL EUROPEAN RURAL SITE: VARIABILITY AND SOURCE APPORTIONMENT

Popis výsledku v původním jazyce

Atmospheric aerosols have a significant impact on the radiative forcing of Earth's climate, either directly through aerosol radiative interactions (ARIs), i.e., scattering or absorption of incoming solar and outgoing infrared radiation, or indirectly through aerosol-cloud interactions (ACIs) (Boucher, 2015; IPCC, 2013; Luoma et al., 2019; Ramanathan et al., 2001). The aerosol radiative forcing of the direct effect consists of a warming effect and a cooling effect (Boucher et al., 2013; Charlson et al., 1992). The predominant cooling effect results from the scattering of radiation by certain species of atmospheric aerosols (including sea salts, nitrates, sulfates, mineral and organic matter, etc.) that reduce the amount of solar radiation reaching the Earth's surface. This phenomenon offsets the greenhouse effect and alters the radiation balance (Pandolfi et al., 2018). According to a number of studies, radiative forcing by aerosols remains one of the main sources of uncertainty in climate models estimations due to the strong spatial and temporal variations in chemical and physical properties of aerosols, their short lifetime compared to greenhouse gases, and diversity of aerosol sources (Boucher, 2015; Charlson et al., 1992; Lee et al., 2016; Luoma et al., 2019). These studies are important for a better understanding of local and long-range transport of both anthropogenic pollutants and natural aerosols and for unbiased long-term trends. The aim of this study is to focus on the temporal variations of light-scattering properties of aerosols at a rural background site in Central Europe. The total light scattering (σsp) and backscattering (σbsp) coefficients and associated calculated optical properties such as the Ångström exponent (SAE), the backscattering ratio (b), and the asymmetry factor (g), are characterized considering different time scales (annual, seasonal, monthly, or diurnal) based on long-term measurement. The optical properties were compared with meteorological conditions (fog, cloudiness); the concentrations of gaseous pollutants such as NOx and SO2 were inspected as well as potential sources of atmospheric aerosols. In addition, radiative forcing, and the influence of other meteorological conditions (e.g., height of planetary boundary layer), chemical 18 composition and particle size distribution at the National Atmospheric Observatory Košetice (NAOK) are being further investigated to better understand the direct effects of aerosols on the local climate.

Název v anglickém jazyce

SEVEN-YEARS BASED CHARACTERISATION OF AEROSOL LIGHT SCATTERING PROPERTIES AT CENTRAL EUROPEAN RURAL SITE: VARIABILITY AND SOURCE APPORTIONMENT

Popis výsledku anglicky

Atmospheric aerosols have a significant impact on the radiative forcing of Earth's climate, either directly through aerosol radiative interactions (ARIs), i.e., scattering or absorption of incoming solar and outgoing infrared radiation, or indirectly through aerosol-cloud interactions (ACIs) (Boucher, 2015; IPCC, 2013; Luoma et al., 2019; Ramanathan et al., 2001). The aerosol radiative forcing of the direct effect consists of a warming effect and a cooling effect (Boucher et al., 2013; Charlson et al., 1992). The predominant cooling effect results from the scattering of radiation by certain species of atmospheric aerosols (including sea salts, nitrates, sulfates, mineral and organic matter, etc.) that reduce the amount of solar radiation reaching the Earth's surface. This phenomenon offsets the greenhouse effect and alters the radiation balance (Pandolfi et al., 2018). According to a number of studies, radiative forcing by aerosols remains one of the main sources of uncertainty in climate models estimations due to the strong spatial and temporal variations in chemical and physical properties of aerosols, their short lifetime compared to greenhouse gases, and diversity of aerosol sources (Boucher, 2015; Charlson et al., 1992; Lee et al., 2016; Luoma et al., 2019). These studies are important for a better understanding of local and long-range transport of both anthropogenic pollutants and natural aerosols and for unbiased long-term trends. The aim of this study is to focus on the temporal variations of light-scattering properties of aerosols at a rural background site in Central Europe. The total light scattering (σsp) and backscattering (σbsp) coefficients and associated calculated optical properties such as the Ångström exponent (SAE), the backscattering ratio (b), and the asymmetry factor (g), are characterized considering different time scales (annual, seasonal, monthly, or diurnal) based on long-term measurement. The optical properties were compared with meteorological conditions (fog, cloudiness); the concentrations of gaseous pollutants such as NOx and SO2 were inspected as well as potential sources of atmospheric aerosols. In addition, radiative forcing, and the influence of other meteorological conditions (e.g., height of planetary boundary layer), chemical 18 composition and particle size distribution at the National Atmospheric Observatory Košetice (NAOK) are being further investigated to better understand the direct effects of aerosols on the local climate.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/LM2018122" target="_blank" >LM2018122: ACTRIS – účast České republiky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

SBORNÍK XXI. VÝROČNÍ KONFERENCE ČESKÉ AEROSOLOVÉ SPOLEČNOSTI

ISBN

978-80-908653-0-3

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

17-22

Název nakladatele

Česká aerosolová společnost

Místo vydání

Praha

Místo konání akce

Kutná Hora

Datum konání akce

10. 3. 2022

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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