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Contribution of brown carbon to light absorption in emissions of European residential biomass combustion appliances.
Atmos. Chem. Phys. 24, 3197-3215 (2024)
Residential biomass combustion significantly contributes to light-absorbing carbonaceous aerosols in the atmosphere, impacting the earth’s radiative balance at regional and global levels. This study investigates the contribution of brown carbon (BrC) to the total particulate light absorption in the wavelength range of 370–950 nm (BrC370–950) and the particulate absorption Ångström exponents (AAE470/950) in 15 different European residential combustion appliances using a variety of wood-based fuels. BrC370–950 was estimated to be from 1 % to 21 % for wood log stoves and 10 % for a fully automatized residential pellet boiler. Correlations between the ratio of organic to elemental carbon (OC /EC) and BrC370–950 indicated that a one-unit increase in OC /EC corresponded to approximately a 14 % increase in BrC370–950. Additionally, BrC370–950 was clearly influenced by the fuel moisture content and the combustion efficiency, while the effect of the combustion appliance type was less prominent. AAE470/950 of wood log combustion aerosols ranged from 1.06 to 1.61. By examining the correlation between AAE470/950 and OC /EC, an AAE470/950 close to unity was found for pure black carbon (BC) particles originating from residential wood combustion. This supports the common assumption used to differentiate light absorption caused by BC and BrC. Moreover, diesel aerosols exhibited an AAE470/950 of 1.02, with BrC contributing only 0.66 % to the total absorption, aligning with the assumption employed in source apportionment. These findings provide important data to assess the BrC from residential wood combustion with different emission characteristics and confirm that BrC can be a major contributor to particulate UV and near-UV light absorption for northern European wood stove emissions with relatively high OC /EC ratios.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Black Carbon; Source Apportionment; Angstrom Exponent; Elemental Carbon; Optical-properties; Organic-carbon; Fossil-fuel; Aerosol; Aethalometer; Dependence
ISSN (print) / ISBN
1680-7316
e-ISSN
1680-7324
Quellenangaben
Volume: 24,
Issue: 5,
Pages: 3197-3215
Publisher
European Geosciences Union (EGU) ; Copernicus
Publishing Place
Bahnhofsallee 1e, Gottingen, 37081, Germany
Non-patent literature
Publications
Reviewing status
Peer reviewed
Grants
Helmholtz Virtual Institute of Complex Molecular Systems in Environmental Health, Aerosols and Health (HICE) - Initiative and Networking Fund of the Helmholtz Association (HGF, Germany)
Research Council of Finland
Finnish Cultural Foundation, North Karelia, and North Savo Funds (AERO-LCA project)
Pohjois-Savon Rahasto
Research Council of Finland
Finnish Cultural Foundation, North Karelia, and North Savo Funds (AERO-LCA project)
Pohjois-Savon Rahasto