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Preprints
https://doi.org/10.5194/acp-2018-295
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-295
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  24 Apr 2018

24 Apr 2018

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This preprint was under review for the journal ACP but the revision was not accepted.

Fossil and Non-fossil Sources of Organic and Elemental Carbon Aerosols in Beijing, Shanghai and Guangzhou: Seasonal Variation of Carbon Source

Di Liu1, Matthias Vonwiller2, Jun Li1, Junwen Liu3, Sönke Szidat2, Yanlin Zhang4, Chongguo Tian5, Yinjun Chen6, Zhineng Cheng1, Guangcai Zhong1, Pingqing Fu7, and Gan Zhang1 Di Liu et al.
  • 1State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
  • 2Department of Chemistry and Biochemistry & Oeschger Centre for Climate Change Research, University of Bern, Berne, 3012, Switzerland
  • 3Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China
  • 4Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science and Technology, Nanjing 210044, China
  • 5Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
  • 6State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Cities' Mitigation and Adaptation to Climate Change, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
  • 7Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China

Abstract. Fossil fuel (FF) combustion and biomass burning are the two most important contributors to the highly polluted air in China. Given that the large territorial area of China, it is interesting to know how these two emission sources exert influences on carbonaceous particles over megacities in different regions and different seasons. Here, the radiocarbon (14C) isotopic signals are reported in Beijing, Shanghai and Guangzhou, China from 2013 to 2014. Generally, a greater contribution of non-fossil (NF) (> 55 %) source was found in all cities in autumn. However, the source seasonality was different among the cities in other seasons. In winter, FF contributed the most in Beijing (64 %), NF contributed the most in Guangzhou (63 %), and FF contributed slightly more than NF in Shanghai (54 %). In spring and summer, Beijing and Guangzhou were similar to each other with a higher contribution of FF (55 % and 63 %, respectively) than NF. FF had the highest contribution (71 %) in Shanghai in summer. Comparison of carbon sources between haze and non-haze periods suggests that the carbon sources in each season are almost consistent. Secondary organic carbon (SOC) mainly originated from biomass burning and vehicle emissions, except in Beijing in winter when the major source was residual coal combustion.

Di Liu et al.

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Di Liu et al.

Di Liu et al.

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