Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions

Abstract Light-absorbing organic carbon (OC), also termed brown carbon (BrC), from laboratory-based biomass burning (BB) has been studied intensively to understand the contribution of BB to radiative forcing. However, relatively few measurements have been conducted on field-based BB and even fewer m...

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Autores principales:	Mingjie Xie, Michael D. Hays, Amara L. Holder
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3010b050e90b4973b2bf3183a1b300e6
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spelling	oai:doaj.org-article:3010b050e90b4973b2bf3183a1b300e62021-12-02T15:04:58ZLight-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions10.1038/s41598-017-06981-82045-2322https://doaj.org/article/3010b050e90b4973b2bf3183a1b300e62017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06981-8https://doaj.org/toc/2045-2322Abstract Light-absorbing organic carbon (OC), also termed brown carbon (BrC), from laboratory-based biomass burning (BB) has been studied intensively to understand the contribution of BB to radiative forcing. However, relatively few measurements have been conducted on field-based BB and even fewer measurements have examined BrC from anthropogenic combustion sources like motor vehicle emissions. In this work, the light absorption of methanol-extractable OC from prescribed and laboratory BB and gasoline vehicle emissions was examined using spectrophotometry. The light absorption of methanol extracts showed a strong wavelength dependence for both BB and gasoline vehicle emissions. The mass absorption coefficients at 365 nm (MAC365, m2 g−1C) – used as a measurement proxy for BrC – were significantly correlated (p < 0.05) to the elemental carbon (EC)/OC ratios when examined by each BB fuel type. No significant correlation was observed when pooling fuels, indicating that both burn conditions and fuel types may impact BB BrC characteristics. The average MAC365 of gasoline vehicle emission samples is 0.62 ± 0.76 m2 g−1C, which is similar in magnitude to the BB samples (1.27 ± 0.76 m2 g−1C). These results suggest that in addition to BB, gasoline vehicle emissions may also be an important BrC source in urban areas.Mingjie XieMichael D. HaysAmara L. HolderNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mingjie Xie Michael D. Hays Amara L. Holder Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions
description	Abstract Light-absorbing organic carbon (OC), also termed brown carbon (BrC), from laboratory-based biomass burning (BB) has been studied intensively to understand the contribution of BB to radiative forcing. However, relatively few measurements have been conducted on field-based BB and even fewer measurements have examined BrC from anthropogenic combustion sources like motor vehicle emissions. In this work, the light absorption of methanol-extractable OC from prescribed and laboratory BB and gasoline vehicle emissions was examined using spectrophotometry. The light absorption of methanol extracts showed a strong wavelength dependence for both BB and gasoline vehicle emissions. The mass absorption coefficients at 365 nm (MAC365, m2 g−1C) – used as a measurement proxy for BrC – were significantly correlated (p < 0.05) to the elemental carbon (EC)/OC ratios when examined by each BB fuel type. No significant correlation was observed when pooling fuels, indicating that both burn conditions and fuel types may impact BB BrC characteristics. The average MAC365 of gasoline vehicle emission samples is 0.62 ± 0.76 m2 g−1C, which is similar in magnitude to the BB samples (1.27 ± 0.76 m2 g−1C). These results suggest that in addition to BB, gasoline vehicle emissions may also be an important BrC source in urban areas.
format	article
author	Mingjie Xie Michael D. Hays Amara L. Holder
author_facet	Mingjie Xie Michael D. Hays Amara L. Holder
author_sort	Mingjie Xie
title	Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions
title_short	Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions
title_full	Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions
title_fullStr	Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions
title_full_unstemmed	Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions
title_sort	light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3010b050e90b4973b2bf3183a1b300e6
work_keys_str_mv	AT mingjiexie lightabsorbingorganiccarbonfromprescribedandlaboratorybiomassburningandgasolinevehicleemissions AT michaeldhays lightabsorbingorganiccarbonfromprescribedandlaboratorybiomassburningandgasolinevehicleemissions AT amaralholder lightabsorbingorganiccarbonfromprescribedandlaboratorybiomassburningandgasolinevehicleemissions
_version_	1718388945436278784

Light-absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions

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