0563790 - ÚCHP 2023 RIV FI eng A - Abstrakt
Suchánková, Lenka - Mbengue, S. - Zíková, Naděžda - Ondráček, Jakub - Holubová Šmejkalová, A. - Holoubek, I. - Ždímal, Vladimír - Prokeš, R.
A Seven-Years Based Characterization 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.
[ACTRIS Science Conference /1./. 11.05.2022-13.05.2022, Helsinki]
Grant CEP: GA MŠMT(CZ) LM2015037
Institucionální podpora: RVO:67985858
Klíčová slova: scattering and backscattering coefficient * nephelometer * long-term measurement * climate change
Obor OECD: Meteorology and atmospheric sciences
Web výsledku:
http://www.faar.fi/wp-content/uploads/2022/04/RS250_AbstractBook_ACTRIS_SC_2022.pdf

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). The aerosol radiative forcing of the direct effect consists of a warming effect and a cooling effect. 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. 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. 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).
Trvalý link: https://hdl.handle.net/11104/0335593