Environment International, Journal Year: 2024, Volume and Issue: 195, P. 109185 - 109185
Published: Dec. 9, 2024
Carbonaceous aerosols (CA), composed of black carbon (BC) and organic matter (OM), significantly impact the climate. Light absorption properties CA, particularly BC brown (BrC), are crucial due to their contribution global regional warming. We present (b
Language: Английский
Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(4), P. 2423 - 2442
Published: Feb. 25, 2025
Abstract. Extensive industrial operations in the Athabasca oil sands region (AOSR) (Alberta, Canada) are a suspected source of water-soluble brown carbon (WS-BrC), class light-absorbing organic aerosols capable altering atmospheric solar-radiation budgets. However, current understanding WS-BrC across AOSR is limited, and primary regional sources these unknown. During summer 2021, active filter-pack samplers were deployed at five sites to collect total suspended particulate matter for purpose evaluating WS-BrC. Ultraviolet–visible spectroscopy fluorescence excitation–emission matrix (EEM) spectroscopy, complemented by parallel factor analysis (PARAFAC) modelling, employed sample characterization. Aerosol absorbance was comparable between near-industry remote field sites, suggesting that exerted limited influence on radiative forcing. The combined EEM–PARAFAC method identified three fluorescent components (fluorophores), including one humic-like substance (C1) two protein-like substances (C2 C3). Sites near facilities exposures receiving transport from local industry (as indicated back-trajectory analysis) displayed increased C1 C3 fluorescence; moreover, both fluorophores positively correlated with elements (i.e. vanadium sulfur) gaseous pollutants nitrogen dioxide reduced sulfur), indicative emissions. C2 fluorophore exhibited high emission intensity near-field during severe wildfire smoke events, while positive correlations indicator variables suggest likely reflected wildfire-generated anthropogenic These results demonstrate an accessible cost-effective tool can be applied monitor AOSR.
Language: Английский
Citations
1
Environment International, Journal Year: 2024, Volume and Issue: 195, P. 109185 - 109185
Published: Dec. 9, 2024
Carbonaceous aerosols (CA), composed of black carbon (BC) and organic matter (OM), significantly impact the climate. Light absorption properties CA, particularly BC brown (BrC), are crucial due to their contribution global regional warming. We present (b
Language: Английский
Citations
1