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Differences in stable carbon isotopic composition in the fine bulk aerosol and gas phases based on seasonally resolved data at a Prague site.

SYSNO ASEP	0573523
Document Type	A - Abstract
R&D Document Type	The record was not marked in the RIV
R&D Document Type	Není vybrán druh dokumentu
Title	Differences in stable carbon isotopic composition in the fine bulk aerosol and gas phases based on seasonally resolved data at a Prague site.
Author(s)	Vodička, Petr (UCHP-M)_{RID, ORCID, SAI} Kawamura, K. (JP) Schwarz, Jaroslav (UCHP-M)_{RID, ORCID, SAI} Ždímal, Vladimír (UCHP-M)_{RID, ORCID, SAI}
Action	EGU General Assembly 2022
Event date	23.05.2022 - 27.05.2022
VEvent location	Vienna
Country	AT - Austria
Event type	EUR
Language	eng - English
Keywords	isotope fractionation ; aerosol and gas ; seasonal variations
OECD category	Meteorology and atmospheric sciences
R&D Projects	LM2018122 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	EF16_013/0001315 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UCHP-M - RVO:67985858
Annotation	Isotope fractionation between the gas and aerosol phases is an important phenomenon in terms of studying atmospheric processes. Here, we studied seasonal variations in the stable carbon isotope ratio (δ13C) of total carbon (TC; δ13CTC) and water-soluble organic carbon (WSOC; δ13CWSOC) in fine aerosol particles (PM2.5) as well as in the total carbon of the gas phase (TCgas; δ13CTCgas) at a suburban site in Prague, Czech Republic, Central Europe. The most 13C enrichment was found in WSOC, followed by particulate TC, whereas the most 13C depletion was found in gaseous TC. The clear seasonal pattern for all δ13C values (with the highest values in winter and lowest in summer) provides evidence for the presence of different aerosol sources at the site during the year. Despite the different seasonal compositions of carbonaceous aerosols, the isotope differences (Δδ13C) between the analyzed bulk aerosol parts and phases were similar during the seasons. This shows that the fractionation of stable carbon isotopes is a predominantly physical process in which the chemical composition of individual compounds in bulk aerosols does not play a major role.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2024

Number of the records: 1