Annual Fossil-Fuel CO2 Emissions: Global Stable Carbon Isotopic Signature

1996 ◽  
Author(s):  
R.J. Andres, ◽  
T.A. Boden, ◽  
G. Marland,
Keyword(s):  
Co2 Emissions ◽  
Fossil Fuel ◽  
Isotopic Signature ◽  
Stable Carbon ◽  
Carbon Isotopic

Seasonal variations in the stable carbon isotopic signature of biogenic methane in a coastal sediment

Science ◽  
1986 ◽  
Vol 233 (4770) ◽  
pp. 1300-1303 ◽  
Author(s):  
C. Martens ◽  
N. Blair ◽  
C. Green ◽  
D. Des Marais
Keyword(s):  
Seasonal Variations ◽  
Isotopic Signature ◽  
Coastal Sediment ◽  
Stable Carbon ◽  
Biogenic Methane ◽  
Carbon Isotopic

scholarly journals Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids, and α-dicarbonyls in PM<sub>2.5</sub> from Beijing, China

2017 ◽  
Author(s):  
Wanyu Zhao ◽  
Kimitaka Kawamura ◽  
Siyao Yue ◽  
Lianfang Wei ◽  
Hong Ren ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Succinic Acid ◽  
Biomass Burning ◽  
Fossil Fuel ◽  
Carbon Isotopic Composition ◽  
Dicarboxylic Acids ◽  
Fossil Fuel Combustion ◽  
Stable Carbon ◽  
Carbon Isotopic ◽  
Oxocarboxylic Acids

Abstract. This study investigates the seasonal variation, molecular distribution and stable carbon isotopic composition of diacids, oxocarboxylic acids and α-dicarbonyls to better understand the sources and formation processes of fine aerosols (PM2.5) in Beijing. The concentrations of total dicarboxylic acids varied from 110 to 2580 ng m−3, whereas oxoacids (9.50–353 ng m−3) and dicarbonyls (1.50–85.9 ng m−3) were less abundant. Oxalic acid was found to be the most abundant individual species, followed by succinic acid or occasionally by terephthalic acid (tPh), a plastic burning tracer. Ambient concentrations of phthalic acid (37.9±27.3 ng m−3) and tPh (48.7±51.1 ng m−3) are larger in winter than in other seasons, illustrating that fossil fuel combustion and plastic waste incineration contribute more significantly to wintertime aerosols. The year-round mass concentration ratios of malonic acid to succinic acid (C3/C4) are relatively by comparison with those in other urban aerosols and remote marine aerosols, most of which are less than or equal to unity in Beijing; thus, the degree of photochemical formation of diacids in Beijing is insignificant. Moreover, positive correlations of some oxocarboxylic acids and α-dicarbonyls with nss-K+, a tracer for biomass burning, suggest biogenic combustion activities accounting for a large contribution of these organic acids and related precursors. The mean δ13C value of succinic acid is highest among all species with values of −17.1±3.9‰ (winter) and −17.1±2.0‰ (spring), while malonic acid is less enriched in 13C than others in autumn (−17.6±4.6‰) and summer (−18.7±4.0‰). The δ13C values of major species in the Beijing aerosols are generally lower with a wider range than those in downwind regions in the western North Pacific, which indicates that Beijing has diverse emission sources with weak photooxidation. Thus, our study demonstrates that in addition to photochemical oxidation, high abundances of diacids, oxocarboxylic acids and α-dicarbonyls in Beijing are largely associated with anthropogenic primary emissions, such as biomass burning, fossil fuel combustion, and plastic burning.

scholarly journals Compound-specific stable carbon isotopic signature of carbohydrate pyrolysis products from C3 and C4 plants

2015 ◽  
Vol 96 (3) ◽  
pp. 948-953 ◽  
Author(s):  
José A González-Pérez ◽  
Nicasio T Jiménez-Morillo ◽  
José M de la Rosa ◽  
Gonzalo Almendros ◽  
Francisco J González-Vila
Keyword(s):  
Isotopic Signature ◽  
C4 Plants ◽  
Stable Carbon ◽  
C3 And C4 Plants ◽  
Pyrolysis Products ◽  
Carbon Isotopic

scholarly journals Factors influencing the stable carbon isotopic signature of methane from combustion and biomass burning

2000 ◽  
Vol 105 (D2) ◽  
pp. 1867-1877 ◽  
Author(s):  
Jeffrey P. Chanton ◽  
Christine M. Rutkowski ◽  
Candace C. Schwartz ◽  
Darold E. Ward ◽  
Lindsay Boring
Keyword(s):  
Biomass Burning ◽  
Isotopic Signature ◽  
Stable Carbon ◽  
Carbon Isotopic ◽  
Factors Influencing

scholarly journals Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and <i>α</i>-dicarbonyls in PM<sub>2.5</sub> from Beijing, China

2018 ◽  
Vol 18 (4) ◽  
pp. 2749-2767 ◽  
Author(s):  
Wanyu Zhao ◽  
Kimitaka Kawamura ◽  
Siyao Yue ◽  
Lianfang Wei ◽  
Hong Ren ◽  
...  
Keyword(s):  
Succinic Acid ◽  
Fossil Fuel ◽  
Carbon Isotopic Composition ◽  
Dicarboxylic Acids ◽  
Plastic Waste ◽  
Fossil Fuel Combustion ◽  
Stable Carbon ◽  
Carbon Isotopic ◽  
Waste Burning ◽  
Oxocarboxylic Acids

Abstract. This study investigates the seasonal variation, molecular distribution and stable carbon isotopic composition of diacids, oxocarboxylic acids and α-dicarbonyls to better understand the sources and formation processes of fine aerosols (PM2.5) in Beijing. The concentrations of total dicarboxylic acids varied from 110 to 2580 ng m−3, whereas oxoacids (9.50–353 ng m−3) and dicarbonyls (1.50–85.9 ng m−3) were less abundant. Oxalic acid was found to be the most abundant individual species, followed by succinic acid or occasionally by terephthalic acid (tPh), a plastic waste burning tracer. Ambient concentrations of phthalic acid (37.9 ± 27.3 ng m−3) and tPh (48.7 ± 51.1 ng m−3) were larger in winter than in other seasons, illustrating that fossil fuel combustion and plastic waste incineration contribute more to wintertime aerosols. The year-round mass concentration ratios of malonic acid to succinic acid (C3 ∕ C4) were relatively low by comparison with those in other urban aerosols and remote marine aerosols. The values were less than or equal to unity in Beijing, implying that the degree of photochemical formation of diacids in Beijing is insignificant. Moreover, strong correlation coefficients of major oxocarboxylic acids and α-dicarbonyls with nss-K+ suggest that biomass burning contributes significantly to these organic acids and related precursors. The mean δ13C value of succinic acid is the highest among all species, with values of −17.1 ± 3.9 ‰ (winter) and −17.1 ± 2.0 ‰ (spring), while malonic acid is more enriched in 13C than others in autumn (−17.6 ± 4.6 ‰) and summer (−18.7 ± 4.0 ‰). The δ13C values of major species in Beijing aerosols are generally lower than those in the western North Pacific atmosphere, the downwind region, which indicates that stable carbon isotopic compositions of diacids depend on their precursor sources in Beijing. Therefore, our study demonstrates that in addition to photochemical oxidation, high abundances of diacids, oxocarboxylic acids and α-dicarbonyls in Beijing are largely associated with anthropogenic primary emissions, such as biomass burning, fossil fuel combustion and plastic waste burning.

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