Exploring seasonal variations in δ13C of dicarboxylic acids in fine aerosols: Insights from a Central European background site

0585396 - ÚCHP 2025 eng A - Abstract
Vodička, Petr - Kawamura, K. - Schwarz, Jaroslav - Ždímal, Vladimír
Exploring seasonal variations in δ13C of dicarboxylic acids in fine aerosols: Insights from a Central European background site.
[EGU General Assembley 2024 - online. Vienna, 14.04.2024-19.04.2024]
Method of presentation: Přednáška
Event organizer: European Geosciences Union
URL events: https://doi.org/10.5194/egusphere-egu24-5233 
R&D Projects: GA MŠMT(CZ) LM2023030; GA ČR(CZ) GC20-08304J
Grant - others:JSPS(JP) 24221001
Institutional support: RVO:67985858
Keywords : PM1 aerosol * stable carbon isotope * dicarboxylic acids
OECD category: Meteorology and atmospheric sciences

In this study, we present the measurement results of stable carbon isotope ratio (δ13C) performed on a one-year aerosol samples (n = 96, 24h time resolution during Sep. 2013 - Aug. 2014) for dicarboxylic acids (hereafter “diacids”) and related compounds in PM1 at a rural background site National Atmospheric Observatory Košetice (NAOK), Czech Republic, Central Europe. In previous study on the molecular distributions of diacids (Vodička et al., 2023a), we observed a distinct seasonal variation in the composition of diacids in PM1. In winter, approximately 75% of the organic aerosols originated from anthropogenic sources, whereas in summer, over 75% were attributed to biogenic sources. The objective of this study was to investigate whether these differences are reflected in δ13C of diacids.
Permanent Link: https://hdl.handle.net/11104/0353109