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Impact of long-range transport on black carbon source contribution and optical aerosol properties in two urban environments

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dc.abstract.enUrban areas, as major sources of aerosol black carbon emissions, contribute to increased pollution levels in surrounding regions by air mass long-range transport, which should be taken into account in implementation of emission-reduction strategies. Properties of light-absorbing aerosol particles and a novel approach to assess the impact of long-range transport on black carbon (BC) pollution in two under-investigated urban en- vironments: Warsaw (Poland, Central Europe) and Vilnius (Lithuania, North-Eastern Europe) are presented. During the warm season of May–August 2022, BC mass concentration and aerosol optical properties: the scattering Ångstr¨om exponent (SAE), absorption Ångstr¨om exponent (AAE), and single scattering albedo (SSA) were investigated. Generally, the mean BC mass concentration was higher at the more polluted site in Warsaw (1.07 μg/m3) than in Vilnius (0.77 μg/m3). The BC source apportionment to biomass burning (BCBB) and fossil fuel combustion (BCFF) showed similar contributions for both sites with BCBB (13–19%) being significantly lower than BCFF (81–87%). A uniform flow of air masses transporting aerosol particles over long distances to both sites was observed for 42% of the days. It affected BC mass concentration as follows: BC decrease was found similar at both sites (42% in Warsaw, 50% in Vilnius) but increase was twice higher in Vilnius (64%) than in Warsaw (30%). Despite variations in BC mass concentration, both sites exhibited a comparable abundance (90%) of submicron (SAE<1.3), BC-dominated (AAE<1.5) particles. The mean SSA was very low (0.69 ± 0.1 in Warsaw, 0.72 ± 0.1 in Vilnius), which indicates a very strong contribution of light-absorbing aerosol particles in both environments. The local episodes of biomass burning due to celebrations of May Days on 1st – 3rd May in Warsaw and Midsummer on 24th June in Vilnius showed similar aerosol properties in both cities (1.5<AAE<1.7, 1.7<SAE<2.2) but were highly different than any other during the entire campaign.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorByčenkienė, Steigvilė
dc.contributor.authorStachlewska, Iwona
dc.contributor.authorMontoro, Fátima Mirza
dc.contributor.authorUgboma, Emeka
dc.contributor.authorMinderytė, Agnė
dc.date.accessioned2024-01-25T03:56:42Z
dc.date.available2024-01-25T03:56:42Z
dc.date.issued2023
dc.description.financeNie dotyczy
dc.description.number9
dc.description.volume9
dc.identifier.doi10.1016/J.HELIYON.2023.E19652
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/109020
dc.identifier.weblinkhttps://api.elsevier.com/content/article/PII:S2405844023068603?httpAccept=text/xml
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofHeliyon
dc.relation.pagese19652
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleImpact of long-range transport on black carbon source contribution and optical aerosol properties in two urban environments
dc.typeJournalArticle
dspace.entity.typePublication