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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 by D. Paraskevopoulou; D.G. Kaskaoutis; G. Grivas; S. Bikkina; M. Tsagkaraki; I.M. Vrettou; K. Tavernaraki; K. Papoutsidaki; I. Stavroulas; E. Liakakou; A. Bougiatioti; K. Oikonomou; E. Gerasopoulos; N. Mihalopoulos is a Environmental Science article available to read on EtoBox.

What is 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 about?

Biomass burning is a major source of Brown Carbon (BrC), strongly contributing to radiative forcing. In urban areas of the climate-sensitive Southeastern European region, where strong emissions from residential wood burning (RWB) are reported, radiative impacts of carbonaceous aerosols remain largely unknown. This study examines the absorption properties of water- and methanol-soluble organic carbon (WSOC, MeS\_OC) in a city (Ioannina, Greece) heavily impacted by RWB. Measurements were performed during winter (December 2019 – February 2020) and summer (July – August 2019) periods, characterized by RWB and photochemical processing of organic aerosol (OA), respectively. PM2.5 filter extracts were analyzed spectrophotometrically for water- and methanol-soluble BrC (WS\_BrC, MeS\_BrC) absorption. WSOC concentrations were quantified using TOC analysis, while those of MeS\_OC were determined using a newly developed direct quantification protocol, applied for the first time to an extended series of ambient samples. The direct method led to a mean MeS\_OC/OC of 0.68 and a more accurate subsequent estimation of absorption efficiencies. The mean winter WS\_BrC and MeS\_BrC absorptions at 365

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Author

D. Paraskevopoulou; D.G. Kaskaoutis; G. Grivas; S. Bikkina; M. Tsagkaraki; I.M. Vrettou; K. Tavernaraki; K. Papoutsidaki; I. Stavroulas; E. Liakakou; A. Bougiatioti; K. Oikonomou; E. Gerasopoulos; N. Mihalopoulos

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)