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The importance of non-fossil sources in carbonaceous aerosols in a megacity of central China during the 2013 winter haze episode: A source apportionment constrained by radiocarbon and organic tracers
AbstractTo determine the causes of a severe haze episode in January 2013 in China, a source apportionment of different carbonaceous aerosols (CAs) was conducted in a megacity in central China (Wuhan, Hubei Province) by using the measurements of radiocarbon and molecular organic tracers. Non-fossil sources (e.g., domestic biofuel combustion and biogenic emissions) were found to be responsible for 62% ± 5% and 26% ± 8% of organic carbon (OC) and elemental carbon (EC) components by mass, respectively. Non-fossil sources contributed 57% ± 4% to total CAs in this large-scale haze event, whereas fossil-fuel sources were less dominant (43% ± 4%). The CAs were composed of secondary organic carbon (SOC; 46% ± 10%), primary fossil-fuel carbon (29% ± 4%) and primary biomass-burning carbon (25% ± 10%). Although SOC was formed mainly from non-fossil sources (70% ± 4%), the role of fossil precursors was substantial (30% ± 4%), much higher than at the global scale. Combined measurement of organic tracers and radiocarbon showed that most non-fossil SOC was probably derived from biomass burning during this long-lasting haze episode in central China.
HighlightsRadiocarbon and organic tracers were determined in a megacity of central China during an extreme haze event in 2013 winter.The contributions of non-fossil sources in OC and EC were 62% ± 5% and 26% ± 8%, respectively.The contributions of non-fossil sources in WIOC and WSOC were 61% ± 4% and 63% ± 6%, respectively.Most non-fossil SOC particles probably were derived from the atmospheric processes regarding biomass-burning.
The importance of non-fossil sources in carbonaceous aerosols in a megacity of central China during the 2013 winter haze episode: A source apportionment constrained by radiocarbon and organic tracers
AbstractTo determine the causes of a severe haze episode in January 2013 in China, a source apportionment of different carbonaceous aerosols (CAs) was conducted in a megacity in central China (Wuhan, Hubei Province) by using the measurements of radiocarbon and molecular organic tracers. Non-fossil sources (e.g., domestic biofuel combustion and biogenic emissions) were found to be responsible for 62% ± 5% and 26% ± 8% of organic carbon (OC) and elemental carbon (EC) components by mass, respectively. Non-fossil sources contributed 57% ± 4% to total CAs in this large-scale haze event, whereas fossil-fuel sources were less dominant (43% ± 4%). The CAs were composed of secondary organic carbon (SOC; 46% ± 10%), primary fossil-fuel carbon (29% ± 4%) and primary biomass-burning carbon (25% ± 10%). Although SOC was formed mainly from non-fossil sources (70% ± 4%), the role of fossil precursors was substantial (30% ± 4%), much higher than at the global scale. Combined measurement of organic tracers and radiocarbon showed that most non-fossil SOC was probably derived from biomass burning during this long-lasting haze episode in central China.
HighlightsRadiocarbon and organic tracers were determined in a megacity of central China during an extreme haze event in 2013 winter.The contributions of non-fossil sources in OC and EC were 62% ± 5% and 26% ± 8%, respectively.The contributions of non-fossil sources in WIOC and WSOC were 61% ± 4% and 63% ± 6%, respectively.Most non-fossil SOC particles probably were derived from the atmospheric processes regarding biomass-burning.
The importance of non-fossil sources in carbonaceous aerosols in a megacity of central China during the 2013 winter haze episode: A source apportionment constrained by radiocarbon and organic tracers
Liu, Junwen (author) / Li, Jun (author) / Vonwiller, Matthias (author) / Liu, Di (author) / Cheng, Hairong (author) / Shen, Kaijun (author) / Salazar, Gary (author) / Agrios, Konstantinos (author) / Zhang, Yanlin (author) / He, Quanfu (author)
Atmospheric Environment ; 144 ; 60-68
2016-08-23
9 pages
Article (Journal)
Electronic Resource
English
Source apportionment of black carbon aerosols in winter across China
| Elsevier | 2023