Brown carbon absorption and radiative effects under intense residential wood burning conditions in Southeastern Europe: New insights into the abundance and absorptivity of methanol-soluble organic aerosols

Paraskevopoulou, Despina; Kaskaoutis, Dimitris G.; Grivas, Georgios; Bikkina, Srinivas; Parinos, Constantine; Vrettou, I.M.; Tavernaraki, Kalliopi; Papoutsidaki, K.; Stavroulas, Iasonas; Liakakou, Eleni; Bougiatioti, A.; Oikonomou, K.; Gerasopoulos, E.; Mihalopoulos, Nikolaos

doi:10.1016/j.scitotenv.2022.160434

Cited by 22 publications

(23 citation statements)

References 128 publications

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“…In the second cross-plot ( Figure 4 b), the impact of BB is confirmed for Ioannina [ 30 , 115 ], with the majority of points concentrated in the upper-right ninth of the grid. The important BB impact in Athens [ 18 , 116 ] was validated mainly by the HMW ratio, while the BaA/(BaA + Chr) was more balanced between vehicular and RWB emissions.…”

Section: Resultsmentioning

confidence: 90%

“…In addition, the enhanced atmospheric reactivity during the warm period led to PAH substitution or degradation [ 83 ] (this was particularly visible for BaP, the levels of which collapsed in summer across the country). High seasonal differences were observed for Σ 16 PAHs at the two urban background sites, Athens and especially Ioannina, as a result of strong RWB emissions in limited dispersion conditions that favor the appearance of intense pollution events (IPEs) in winter [ 18 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…There were, however, days in Ioannina that, despite high BaA/(BaA + Chr) ratios (>0.30), were classified as petrogenic by the Ant/(Ant + Phe) ratio. They all had Ant concentrations below the LOD and in their majority they were low-concentration days, which probably favored the almost complete degradation of Ant [ 30 , 114 ].…”

Section: Resultsmentioning

confidence: 99%

“…Ioannina is a medium-sized mountainous city impacted by intense residential biomass burning (BB), especially during winter nights. These emissions, in combination with the city’s climate and topography (mountainous basin, air mass stagnation, haze-promoting conditions), result in a large accumulation of organic aerosols, which is also due to local-scale secondary processing [ 29 , 30 ]. Organic aerosol sources were also recently characterized at the port of Piraeus [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal Gradients of PAH Concentrations in Greek Cities and Associated Exposure Impacts

Tsiodra,

Tavernaraki,

Grivas

et al. 2024

Toxics

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To study the spatiotemporal variability of particle-bound polycyclic aromatic hydrocarbons (PAHs) and assess their carcinogenic potential in six contrasting urban environments in Greece, a total of 305 filter samples were collected and analyzed. Sampling sites included a variety of urban background, traffic (Athens, Ioannina and Heraklion), rural (Xanthi) and near-port locations (Piraeus and Volos). When considering the sum of 16 U.S. EPA priority PAHs, as well as that of the six EU-proposed members, average concentrations observed across locations during summer varied moderately (0.4–2.2 ng m−3) and independently of the population of each site, with the highest values observed in the areas of Piraeus and Volos that are affected by port and industrial activities. Winter levels were significantly higher and more spatially variable compared to summer, with the seasonal enhancement ranging from 7 times in Piraeus to 98 times in Ioannina, indicating the large impact of PAH emissions from residential wood burning. Regarding benzo(a)pyrene (BaP), an IARC Group 1 carcinogen and the only EU-regulated PAH, the winter/summer ratios were 24–33 in Athens, Volos, Heraklion and Xanthi; 60 in Piraeus; and 480 in Ioannina, which is afflicted by severe wood-burning pollution events. An excellent correlation was observed between organic carbon (OC) and benzo(a)pyrene (BaP) during the cold period at all urban sites (r2 > 0.8) with stable BaP/OC slopes (0.09–0.14 × 10−3), highlighting the potential use of OC as a proxy for the estimation of BaP in winter conditions. The identified spatiotemporal contrasts, which were explored for the first time for PAHs at such a scale in the Eastern Mediterranean, provide important insights into sources and controlling atmospheric conditions and reveal large deviations in exposure risks among cities that raise the issue of environmental injustice on a national level.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatiotemporal Gradients of PAH Concentrations in Greek Cities and Associated Exposure Impacts

Tsiodra,

Tavernaraki,

Grivas

et al. 2024

Toxics

View full text Add to dashboard Cite

show abstract

“…Finally, as mentioned in the related research article by Paraskevopoulou et al. [16] , the current direct MeS-OC method was compared to the frequently applied indirect method [ 4 , 6 , 25 , 27 ]. In brief, the remaining filter punches of the extraction step were placed on pre-baked aluminum foils and lightly dried at 60°C for about 10 min.…”

Section: Methods Validationmentioning

confidence: 99%

A direct method to quantify methanol-soluble organic carbon for brown carbon absorption studies

Paraskevopoulou¹,

Bikkina²,

Grivas³

et al. 2023

MethodsX

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Research progress on the characteristics, sources, and environmental and potential health effects of water-soluble organic compounds in atmospheric particulate matter

Wang,

Gao,

et al. 2024

Environ Sci Pollut Res

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Brown carbon absorption and radiative effects under intense residential wood burning conditions in Southeastern Europe: New insights into the abundance and absorptivity of methanol-soluble organic aerosols

Cited by 22 publications

References 128 publications

Spatiotemporal Gradients of PAH Concentrations in Greek Cities and Associated Exposure Impacts

Spatiotemporal Gradients of PAH Concentrations in Greek Cities and Associated Exposure Impacts

A direct method to quantify methanol-soluble organic carbon for brown carbon absorption studies

Research progress on the characteristics, sources, and environmental and potential health effects of water-soluble organic compounds in atmospheric particulate matter

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