Spatial and Temporal Analysis of Organic and Black Carbon Mass Concentrations in Lithuania

Pauraitė, Julija; Mordas, Genrik; Byčenkienė, Steigvilė; Ulevičius, Vidmantas

doi:10.3390/atmos6081229

Cited by 22 publications

(10 citation statements)

References 37 publications

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“…e average BC concentration was 1.26 µg·m −3 (SD � 1.35 µg·m −3 ). ese results are consistent with those obtained during the previous studies in Vilnius during the warm period [40] and appear in the typical OA concentration range (1-10 µg·m −3 ) for urban environments [41]. e biggest contributor to the total BC was BC tr whose input reached 92%.…”

Section: Source Apportionmentsupporting

confidence: 91%

Relationship between the Optical Properties and Chemical Composition of Urban Aerosol Particles in Lithuania

Pauraitė

Plauškaitė

Dudoitis

et al. 2018

Advances in Meteorology

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In situ investigation results of aerosol optical properties (absorption and scattering) and chemical composition at an urban background site in Lithuania (Vilnius) are presented. Investigation was performed in May-June 2017 using an aerosol chemical speciation monitor (ACSM), a 7-wavelength Aethalometer and a 3-wavelength integrating Nephelometer. A positive matrix factorisation (PMF) was used for the organic aerosol mass spectra analysis to characterise the sources of ambient organic aerosol (OA). Five OA factors were identified: hydrocarbon-like OA (HOA), biomass-burning OA (BBOA), more and less oxygenated OA (LVOOA and SVOOA, respectively), and local hydrocarbon-like OA (LOA). The average absorption (at 470 nm) and scattering (at 450 nm) coefficients during the entire measurement campaign were 16.59 Mm−1 (standard deviation (SD) = 17.23 Mm−1) and 29.83 Mm−1 (SD = 20.45 Mm−1), respectively. Furthermore, the absorption and scattering Angström exponents (AAE and SAE, respectively) and single-scattering albedo (SSA) were calculated. The average AAE value at 470/660 nm was 0.97 (SD = 0.16) indicating traffic-related black carbon (BCtr) dominance. The average value of SAE (at 450/700 nm) was 1.93 (SD = 0.32) and could be determined by the submicron particle (PM1) dominance versus the supermicron ones (PM > 1 µm). The average value of SSA was 0.62 (SD = 0.13). Several aerosol types showed specific segregation in the SAE versus SSA plot, which underlines different optical properties due to various chemical compositions.

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Section: Source Apportionmentsupporting

confidence: 91%

Relationship between the Optical Properties and Chemical Composition of Urban Aerosol Particles in Lithuania

Pauraitė

Plauškaitė

Dudoitis

et al. 2018

Advances in Meteorology

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“…The marine, sub-marine climate is specific to this terrain. This monitoring site was selected according to strict sitting criteria designed to avoid undue influence from point sources, area sources and local activities (Pauraite et al, 2015).…”

Section: Rural Sitesmentioning

confidence: 99%

Global analysis of continental boundary layer new particle formation based on long-term measurements

Nieminen¹,

Kerminen²,

Petäj̈ä³

et al. 2018

Preprint

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Atmospheric new particle formation (NPF) is an important phenomenon in terms of the global particle number concentrations. Here we investigated the frequency of NPF, formation rates of 10 nm particles and growth rates in the size range of 10-25 nm using at least one year of aerosol number size-distribution observations at 36 different locations around the world. The majority of these measurement sites are in the Northern Hemisphere. We found that the NPF frequency has a strong seasonal variability, taking place on about 30% of the days in March-May and on about 10% of the days in December-February. The median formation rate of 10 nm particles varies by about three orders of magnitude (0.01-10 cm −3 s −1 ) and the growth rate by about an order of magnitude (1-10 nm h −1 ). The smallest values of both formation and growth rates were observed at polar sites and the largest ones in urban environments or anthropogenically influenced rural sites. The correlation between the NPF event frequency and the particle formation and growth rate was at best moderate between the different measurement sites, as well as between the sites belonging to a certain environmental regime. For a better understanding of atmospheric NPF and its regional importance, we would need more observational data from different urban areas in practically all parts of the world, from additional remote and rural locations in Northern America, Asia and most of the Southern Hemisphere (especially Australia), from polar areas, and from at least a few locations over the oceans.

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“…The value of the OC/EC ratio is characteristic of the type of fuel burnt. Typical OC/EC ratios for biomass burning are around 6-8, with maximum values reaching up to 14-15 [49][50][51]. …”

Section: Correlation With Biomass Burning Markersmentioning

confidence: 99%

Annual Variability of Black Carbon Concentrations Originating from Biomass and Fossil Fuel Combustion for the Suburban Aerosol in Athens, Greece

et al. 2017

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Abstract:The objective of this work was to assess the yearly contribution of fossil fuel combustion (BC ff ) and wood burning (BC wb ) to equivalent black carbon (eBC) concentrations, in Athens, Greece. Measurements were conducted at a suburban site from March 2013 to February 2014 and included absorption coefficients at seven wavelengths and PM 2.5 chemical composition data for key biomass burning markers, i.e., levoglucosan, potassium (K) and elemental and organic carbon (EC, OC). A well-documented methodology of corrections for aethalometer attenuation coefficients was applied with a resulting annual dataset of derived absorption coefficients for the suburban Athens' atmospheric aerosol. The Aethalometer model was applied for the source apportionment of eBC. An optimum Ångström exponent for fossil fuel (α ff ) was found, based on the combined use of the model with levoglucosan data. The measured eBC concentrations were equal to 2.4 ± 1.0 µg m −3 and 1.6 ± 0.6 µg m −3 , during the cold and the warm period respectively. The contribution from wood burning was significantly higher during the cold period (21 ± 11%, versus 6 ± 7% in the warm period). BC ff displayed a clear diurnal pattern with a morning peak between 8 and 10 a.m. (during morning rush hour) and a second peak during the evening and night hours, due to the shallowing of the mixing layer. Regression analysis between BC wb concentrations and biomass burning markers (levoglucosan, K and OC/EC ratio) supported the validity of the results.

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Spatial and Temporal Analysis of Organic and Black Carbon Mass Concentrations in Lithuania

Cited by 22 publications

References 37 publications

Relationship between the Optical Properties and Chemical Composition of Urban Aerosol Particles in Lithuania

Relationship between the Optical Properties and Chemical Composition of Urban Aerosol Particles in Lithuania

Global analysis of continental boundary layer new particle formation based on long-term measurements

Annual Variability of Black Carbon Concentrations Originating from Biomass and Fossil Fuel Combustion for the Suburban Aerosol in Athens, Greece

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