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Chemically speciated mass size distribution, particle density, shape and origin of 2 non-refractory PM1 measured at a rural background site in Central Europe.
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SYSNO ASEP 0556453 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Chemically speciated mass size distribution, particle density, shape and origin of 2 non-refractory PM1 measured at a rural background site in Central Europe. Author(s) Pokorná, Petra (UCHP-M) ORCID, RID, SAI
Zíková, Naděžda (UCHP-M) RID, ORCID, SAI
Vodička, Petr (UCHP-M) RID, ORCID, SAI
Lhotka, Radek (UCHP-M) RID, SAI
Mbengue, Saliou (UEK-B) SAI, RID, ORCID
Holubová Šmejkalová, A. (CZ)
Riffault, V. (FR)
Ondráček, Jakub (UCHP-M) RID, ORCID, SAI
Schwarz, Jaroslav (UCHP-M) RID, ORCID, SAI
Ždímal, Vladimír (UCHP-M) RID, ORCID, SAISource Title Atmospheric Chemistry and Physics. - : Copernicus - ISSN 1680-7316
Roč. 22, č. 9 (2022), s. 5829-5858Number of pages 30 s. Language eng - English Country DE - Germany Keywords PM1 ; seasonal variability ; concentration Subject RIV DG - Athmosphere Sciences, Meteorology OECD category Meteorology and atmospheric sciences Subject RIV - cooperation Global Change Research Institute - Athmosphere Sciences, Meteorology 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) GJ19-06110Y GA ČR - Czech Science Foundation (CSF) Research Infrastructure CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Open access Institutional support UCHP-M - RVO:67985858 ; UEK-B - RVO:86652079 UT WOS 000790345000001 EID SCOPUS 85130136469 DOI 10.5194/acp-22-5829-2022 Annotation Seasonal variability of non-refractory PM1 (NR-PM1) was studied at a rural background site (National Atmospheric Observatory Košetice – NAOK) in the Czech Republic to investigate the effect of regional and long-range atmospheric transport in central Europe. NR-PM1 measurements were performed by compact time-of-flight aerosol mass spectrometry (C-ToF-AMS), and the chemically speciated mass size distributions, density, shape, and origin were discussed. Average PM1 concentrations, calculated as the sum of the NR-PM1 and the equivalent black carbon (eBC) concentrations measured by an aethalometer (AE), were 8.58 ± 3.70 µg m−3 in summer and 10.08 ± 8.04 µg m−3 in winter. Organics were dominant during both campaigns (summer/winter: 4.97 ± 2.924.55 ± 4.40 µg m−3), followed by SOin summer (1.68 ± 0.81/1.36 ± 1.38 µg m−3) and NO in winter (0.67 ± 0.38/2.03 ± 1.71 µg m−3). The accumulation mode dominated the average mass size distribution during both seasons, with larger particles of all species measured in winter (mode diameters: Org: 334413 nm, NO: 377/501 nm, SO: 400547 nm, and NH: 489515 nm) indicating regional and long-range transport. However, since the winter aerosols were less oxidized than the summer aerosols (comparing fragments f44 and f43), the importance of local sources in the cold part of the year was still enough to be considered. Although aged continental air masses from the south-east (SE) were rare in summer (7 %), they were related to the highest concentrations of PM1, eBC, and all NR-PM1 species, especially SO and NH. In winter, slow continental air masses from the south-west (SW) (44 %) were linked to inversion conditions over central Europe and were associated with the highest concentrations among all NR-PM1 species as well as PM1 and eBC. Average PM1 material density (ρm) corresponded to higher inorganic contents in both seasons (summer: ∼ 1.30 g cm−3 and winter: ∼ 1.40 g cm−3). During episodes of higher mass concentrations ρm ranged from 1.30–1.40 g cm−3 in summer and from 1.30–1.50 g cm−3 in winter. The dynamic shape factors (χ) decreased slightly with particle mobility diameter (Dm) in both seasons. This study provides insights into the seasonal effects and air mass variability on aerosol particles, focusing on episodes of high mass and number concentrations measured at a central European rural background site. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2023 Electronic address https://acp.copernicus.org/articles/22/5829/2022/acp-22-5829-2022.pdf
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