A seven-years based characterisation of aerosol light scattering properties at central european rural site: variability and source apportionment

0563760 - ÚVGZ 2023 RIV FI eng A - Abstract
Suchánková, Lenka - Mbengue, Saliou - Zíková, N. - Holubová Šmejkalová, A. - Holoubek, Ivan - Ždímal, V. - Prokeš, Roman
A seven-years based characterisation of aerosol light scattering properties at central european rural site: variability and source apportionment.
Abstract Book 1st ACTRIS Science Conference 2022. Helsinki, 2022 - (Ovaska, A.; Vera, J.; Rörup, B.; Petäjä, T.). s. 39-42. ISBN 978-952-7276-80-8. ISSN 2814-4236.
[1st ACTRIS Science Conference 2022. 11.05.2022-13.05.2022]
R&D Projects: GA MŠMT(CZ) LM2015037
Institutional support: RVO:86652079
Keywords : aerosols * scattering properties of aerosol * radiative forcing, climate change * source apportionment * national atmospheric observatory košetice
OECD category: Meteorology and atmospheric sciences

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, IPCC et al.,
2013). The predominant cooling effect results from the scattering of radiation by certain atmospheric
aerosols (including sea salts, nitrates, sulfates, mineral and organic matter, etc.) that reduce the amount of
solar radiation reaching the Earth's surface (IPCC, 2013). 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 a climate model estimate due to the strong
spatial and temporal variations in chemical and physical properties, short lifetime compared to greenhouse
gasses, 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 sources and for unbiased long-term trends. Therefore, we focused on
the temporal variations and sources of light-scattering aerosols at a rural site in central Europe. The total
light scattering (σsp) and backscattering (σbsp) coefficients and associated calculated optical properties such
as the Ångstrӧm exponent (SAE), backscattering ratio (b), and asymmetry factor (g) are characterized
considering different time scales (annual, seasonal, monthly, weekly, and diurnal).
Permanent Link: https://hdl.handle.net/11104/0335571