Change in characteristics of water-soluble and water-insoluble brown carbon aerosols during a large-scale biomass burning
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DOI: 10.1007/s11356-020-09388-7
Abstract: Light-absorbing organic aerosol (brown carbon (BrC)) can significantly affect Earth’s radiation budget and hydrological cycle. Biomass burning (BB) is among the major sources of atmospheric BrC. In this study, day/night pair (10-h integrated) of ambient… read more here.
Keywords: biomass burning; brown carbon; water; brc ... See more keywords
Are fireworks a significant episodic source of brown carbon?
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DOI: 10.1007/s11356-022-20183-4
Abstract: We hypothesize that firework events involving the combustion of charcoal fuel, organic binders, metal salts, and cellulose-based wrapping material could be significant transient sources of aerosol brown carbon (BrC). To test this, we couple high… read more here.
Keywords: brown carbon; brc absorption; brc; carbon ... See more keywords
Spatial and temporal trends in carbonaceous aerosols in the United Kingdom
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DOI: 10.1016/j.apr.2020.09.009
Abstract: Abstract There is an increasing scientific interest in carbonaceous aerosols due to their effects on local air quality and climate. The database of the UK air monitoring networks from 2009 to 2017 was analyzed to… read more here.
Keywords: carbonaceous aerosols; temporal trends; spatial temporal; brc ... See more keywords
The aging behaviors of chromophoric biomass burning brown carbon during dark aqueous hydroxyl radical oxidation processes in laboratory studies
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DOI: 10.1016/j.atmosenv.2019.02.039
Abstract: Abstract This study was conducted to explore the aging behavior of biomass burning (BB) emitted brown carbon (BrC) during an aqueous hydroxyl radical (OH) oxidation process in the absence of light. The evolution characteristics of… read more here.
Keywords: radical oxidation; brown carbon; oxidation; aqueous hydroxyl ... See more keywords
Light absorption properties of brown carbon (BrC) in autumn and winter in Beijing: Composition, formation and contribution of nitrated aromatic compounds
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DOI: 10.1016/j.atmosenv.2020.117289
Abstract: Abstract Nitro-aromatic compounds (NACs) are an important part of brown carbon because of their strong light absorbing properties in the visible and near ultraviolet regions. In this study, the concentration and formation mechanism of eight… read more here.
Keywords: absorption; carbon; autumn winter; formation ... See more keywords
Brown carbon in atmospheric fine particles in Yangzhou, China: Light absorption properties and source apportionment
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DOI: 10.1016/j.atmosres.2020.105028
Abstract: Abstract Light absorbing organic carbon, a.k.a., brown carbon (BrC) is an important contributor to air quality deterioration and global radiative forcing. This work studied optical, chemical properties and sources of BrC in fine particles (PM2.5)… read more here.
Keywords: absorption; abs365 wsoc; carbon; water soluble ... See more keywords
Improved method to apportion optical absorption by black and brown carbon under the influence of haze and fog at Lumbini, Nepal, on the Indo-Gangetic Plains
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DOI: 10.1016/j.envpol.2020.114640
Abstract: Abstract Estimates of the brown carbon (BrC) absorption and their contribution to light absorption in ambient aerosols are poorly understood. The existing approaches to apportion light absorption into black carbon (BC) and BrC mainly use… read more here.
Keywords: absorption; brc absorption; brown carbon; water ... See more keywords
High light absorption and radiative forcing contributions of primary brown carbon and black carbon to urban aerosol
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DOI: 10.1016/j.gr.2020.10.016
Abstract: Abstract To investigate the seasonal variation of black carbon (BC) and brown carbon (BrC) light absorption at an urban site in Xi'an, China, an annual measurement was conducted by using a 7-wavelengths Aethalometer (model AE33).… read more here.
Keywords: absorption; black carbon; carbon; brown carbon ... See more keywords
Water-insoluble Organics Dominate Brown Carbon in Wintertime Urban Aerosol of China: Chemical Characteristics and Optical Properties.
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DOI: 10.1021/acs.est.0c01149
Abstract: The chromophores responsible for light absorption in atmospheric brown carbon (BrC) are not well characterized, which hinders our understanding of BrC chemistry, the links with optical properties, and accurate model representations of BrC to global… read more here.
Keywords: absorption; brown carbon; water; optical properties ... See more keywords
Water/Methanol-Insoluble Brown Carbon Can Dominate Aerosol Enhanced Light Absorption in Port Cities.
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DOI: 10.1021/acs.est.0c03844
Abstract: Light absorption enhancement (Eabs) of black carbon (BC) is a key factor in global climate models, and is impacted by brown carbon (BrC) and the lensing effect of coatings. We conducted an in-depth field study… read more here.
Keywords: brc; water methanol; light absorption; port cities ... See more keywords
Elucidating an Atmospheric Brown Carbon Species-Toward Supplanting Chemical Intuition with Exhaustive Enumeration and Machine Learning.
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DOI: 10.1021/acs.est.1c00885
Abstract: Brown carbon (BrC) is involved in atmospheric light absorption and climate forcing and can cause adverse health effects. Understanding the formation mechanisms and molecular structure of BrC is of key importance in developing strategies to… read more here.
Keywords: brown carbon; brc; chemical intuition; machine learning ... See more keywords