Source apportionment of fine aerosol at a rural background site in Central Europe based on seasonal distributions of dicarboxylic acids, sugars and related compounds

0573525 - ÚCHP 2024 eng A - Abstract
Vodička, Petr - Kawamura, K. - Deshmukh, D.K. - Pokorná, Petra - Schwarz, Jaroslav - Ždímal, Vladimír
Source apportionment of fine aerosol at a rural background site in Central Europe based on seasonal distributions of dicarboxylic acids, sugars and related compounds.
[EGU General Assembly 2023. Vienna, 23.04.2023-28.04.2023]
Method of presentation: Prezentace
R&D Projects: GA MŠMT(CZ) LM2018122; GA ČR(CZ) GC20-08304J
Grant - others:JSPS 24221001; JSPS(JP) P16760
Institutional support: RVO:67985858
Keywords : fine aerosol * rural background site * seasonal distributions
OECD category: Meteorology and atmospheric sciences
https://meetingorganizer.copernicus.org/EGU23/EGU23-6145.html

Water-soluble dicarboxylic acids (hereafter diacids) and sugars are an important part of the atmospheric water-soluble organic aerosol. Here, we studied diacids and other compounds in fine aerosol particles (PM1) collected at a rural background site National Atmospheric Observatory Košetice (NAOK), Czech Republic, Central Europe. Aerosol samples were collected every second day for 24 h from September 2013 to August 2014 (n=146). Based on receptor modeling (PMF), we identified PM1 organic compounds that are more typical to anthropogenic and to biogenic sources. We have apportioned two anthropogenic sources especially evident during the heating season from mid-October to mid-April: (i) biomass burning (BB) (main contribution of levoglucosan and methylsuccinic, maleic, methylmaleic and azelaic acids) and (ii) fossil fuel combustion (FF) (represented by phthalic, terephthalic and ketomalonic acids). Furthermore, we identified two sources of biogenic aerosols: (iii) summer factor was largely characterized by compounds with three and seven carbons (malonic, 4-ketopimelic, oxoheptanoic, methylmalonic acids) while (iv) spring biogenic factor was characterized mostly by primary sugars, normal chain diacids and their precursors (oxalic, malonic, succinic, glutaric, ketomalonic, 4-oxobutanoic and 5-oxopentanoic acids). Last but not least, we distinguished (v) background factor mainly represented by less oxidized diacids precursors such as glyoxal, methylglyoxal, glyoxylic and pyruvic acids, but also by aromatic diacids, which may originate from traffic emissions; a stable and year-round source.
Permanent Link: https://hdl.handle.net/11104/0343959