@article {27045,
	title = {Effects of biomass burning and photochemical oxidation on the black carbon mixing state and light absorption in summer season},
	journal = {Atmospheric EnvironmentAtmospheric EnvironmentAtmospheric Environment},
	volume = {248},
	year = {2021},
	note = {Export Date: 7 June 2021},
	type = {Article},
	abstract = {To investigate the effects of biomass burning and photochemical oxidation on the black carbon (BC) mixing state and light absorption, a tandem centrifugal particle mass analyzer (CPMA) and single-particle soot photometer (SP2) system was used to measure ambient fine particulate BC during EXPLORE-YRD 2018 campaign (EXPeriment on the eLucidation of the atmospheric Oxidation capacity and aerosol foRmation, and their Effects in Yangtze River Delta). The mass ratio (MR) of the non-BC coating to BC core, a morphology-independent parameter to quantify the mixing state of BC-containing aerosols, is derived. Two types of periods were identified, namely non-significant biomass-burning period (NB), and enhanced biomass burning period (EB). The MR was higher during EB (2.3 {\textpm} 0.5), compared with during the NB (2.0 {\textpm} 0.5). MR showed bimodal diurnal variation with peaks in the early morning and early afternoon, mainly due to the biomass burning and photochemical processes, respectively. The light-absorbing enhancement ranged from 1.0 to 1.19 when MR was from 1.4 to 3.4. The relationship of rBC mixing state and its optical properties was parameterized, which can further be used in the regional model. {\textcopyright} 2021 The Author(s)},
	keywords = {acetonitrile, acetylene, aerosol, aerosol formation, aerosols, ammonia, article, Atmospheric oxidation capacity, Biomass, Biomass burning, black carbon, Carbon, Centrifugal particle mass analyzers, chemoluminescence, China, chloride, Circadian Rhythm, combustion, detection method, Diurnal variation, electricity, ethane, flame ionization detection, fossil fuel, humidity, Independent parameters, isopentane, Light absorption, Light absorption enhancement, mass fragmentography, Mixing, mixing state, nitrate, optical properties, Organic matter, oxidation, Particle size, photochemical oxidation, Photochemical process, photochemistry, photometer, photooxidation, priority journal, soot, sulfate, summer, wind speed, Yangtze River, yangtze river delta},
	author = {T. Wang and Zhao, G. and Tan, T. and Yu, Y. and Tang, R. and Dong, H. and S. Chen and X. Li and Lu, K. and Zeng, L. and Y. Gao and Wang, H and Lou, S. and Liu, D. and Hu, M. and Zhao, C. and Guo, S.}
}
