Source apportionment of black carbon aerosols from light absorption observation     and source-oriented modeling: An implication in a coastal city in China

doi:10.5194/acp-2020-451

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-451
	Source apportionment of black carbon aerosols from light absorption observation and source-oriented modeling: An implication in a coastal city in China
	Junjun Deng, Hao Guo, Hongliang Zhang, Jialei Zhu, Xin Wang, and Pingqing Fu
	2020-06-08
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	Black carbon (BC) is the most important light absorbing aerosol in the atmosphere. However, sources of atmospheric BC aerosols are largely uncertain, making it difficult to assess its influence on radiative forcing and climate change. In this study, year-round light-absorption observations were conducted during 2014 using an aethalometer in Xiamen, a coastal city in southeast China. Source apportionment of BC was performed and temporal variations in BC sources were characterized based on both light absorption measurements and a source-oriented air quality model. The annual average concentrations of BC from fossil fuel (BC_ff) and biomass burning (BC_bb) were 2932 ± 1444 ng m⁻³ and 1340 ± 542 ng m⁻³, contributing 66.7 % and 33.3 % to total BC, respectively. BCbb contribution exhibited clear diurnal cycle with the highest level (37.9 %) in the evening rush hour and seasonal pattern with the maximum (39.9 %) in winter. Conditional probability function (CPF) analysis revealed the large biomass burning contributions were accompanied by east-northeasterly and northerly winds. Backward trajectory indicated that air masses from north and east-central China were associated with larger biomass burning contributions. Potential source contribution function (PSCF) and concentration-weighted trajectory (CWT) suggested that north and east-central China and Southeast Asia were potential sources for both BC_ff and BC_bb. The source-oriented modeling results showed that transportation, residential and open biomass burning accounting for 45.3 %, 30.1 % and 17.6 % were the major BC sources. Among the three fuel catalogs, liquid fossil fuel (46.5 %) was the largest source, followed by biomass burning (32.6 %) and coal combustion (20.9 %). Source contributions of biomass burning and fossil fuel combustion identified by the source-oriented model and observation-based method were in good agreement. The source-oriented model also captured the majority of seasonal variations in source contributions. The findings provide solid supports for controlling fossil fuel sources to limit the impacts of BC on climate change and environmental degradation in the relatively clean region in China.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/274360
专题	地球科学
推荐引用方式 GB/T 7714	Junjun Deng, Hao Guo, Hongliang Zhang, Jialei Zhu, Xin Wang, and Pingqing Fu. Source apportionment of black carbon aerosols from light absorption observation and source-oriented modeling: An implication in a coastal city in China[J]. Atmospheric Chemistry and Physics,2020.
APA	Junjun Deng, Hao Guo, Hongliang Zhang, Jialei Zhu, Xin Wang, and Pingqing Fu.(2020).Source apportionment of black carbon aerosols from light absorption observation and source-oriented modeling: An implication in a coastal city in China.Atmospheric Chemistry and Physics.
MLA	Junjun Deng, Hao Guo, Hongliang Zhang, Jialei Zhu, Xin Wang, and Pingqing Fu."Source apportionment of black carbon aerosols from light absorption observation and source-oriented modeling: An implication in a coastal city in China".Atmospheric Chemistry and Physics (2020).