Preprints
https://doi.org/10.5194/acp-2021-916
https://doi.org/10.5194/acp-2021-916

  17 Dec 2021

17 Dec 2021

Review status: this preprint is currently under review for the journal ACP.

Measurement report: Source apportionment of carbonaceous aerosol using dual-carbon isotopes (13C and 14C) and levoglucosan in three northern Chinese cities during 2018–2019

Huiyizhe Zhao1,3,4, Zhenchuan Niu1,2,3,4,5, Weijian Zhou1,2,3,4, Sen Wang6, Xue Feng7, Shugang Wu1,3, Xuefeng Lu1,3, and Hua Du1,3 Huiyizhe Zhao et al.
  • 1State Key Laboratory of Loess and Quaternary Geology, CAS Center for Excellence in Quaternary Science and Global Change, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
  • 2Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
  • 3Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Joint Xi'an AMS Center between IEECAS and Xi'an Jiaotong University, Xi'an 710061, China
  • 4University of Chinese Academy of Sciences, Beijing 100049, China
  • 5Shaanxi Guanzhong Plain Ecological Environment Change and Comprehensive Treatment National Observation and Research Station, Xi’an, China
  • 6Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an, China
  • 7Xi'an Institute for Innovative Earth Environment Research, Xi'an, China

Abstract. In this study, we investigated the characteristics of and changes in the sources of carbonaceous aerosols in northern Chinese cities after the implementation of the Action Plan for Air Pollution Prevention and Control in 2013. We collected PM2.5 samples from three representative inland cities, viz. Beijing (BJ), Xi’an (XA), and Linfen (LF) from January 2018 to April 2019. Elemental carbon (EC), organic carbon (OC), levoglucosan, stable carbon, and radiocarbon were measured in PM2.5 to quantify the sources of carbonaceous aerosol employing Latin hypercube sampling. The best estimate of source apportionment showed that the emissions from liquid fossil fuels contributed 33.6 ± 12.9 %, 26.6 ± 16.4 %, and 24.6 ± 13.4 % of the total carbon (TC) in BJ, XA, and LF, whereas coal combustion contributed 11.2 ± 9.1 %, 19.2 ± 12.3 %, and 39.2 ± 20.5 %, respectively. Non-fossil sources accounted for 55 ± 11 %, 54 ± 10 %, and 36 ± 14 % of the TC in BJ, XA, and LF, respectively. In XA, 48.34 ± 32.01 % of non-fossil sources was attributed to biomass burning. The highest contributors to OC in LF and XA were fossil sources (65.4 ± 14.9 % and 44.9 ± 9.5 %, respectively), whereas that in BJ was non-fossil sources in BJ (56.1 ± 16.7 %). The main contributors to EC were fossil sources, accounting for 92.9 ± 6.13 %, 69.9 ± 20.9 %, and 90.8 ± 9.9 % of the total EC in BJ, XA, and LF, respectively. The decline (6–17 %) in fossil source contributions in BJ and XA since the implementation of the Action Plan indicates the effectiveness of air quality management. We suggest that measures targeted to each city should be strengthened in the future.

Huiyizhe Zhao et al.

Status: open (until 17 Feb 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Huiyizhe Zhao et al.

Data sets

Carbon components and dual-carbon isotopes (13C and 14C) data of PM2.5 in Beijing, Xi'an and Linfen during 2018-2019 Huiyizhe Zhao, Zhenchuan Niu et al. & Data processing group http://paleodata.ieecas.cn/index_EN.aspx

Huiyizhe Zhao et al.

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Short summary
In this study, we investigated the characteristics and changes in the sources of carbonaceous aerosols in northern Chinese cities using dual-carbon isotopes (13C and 14C) and levoglucosan during 2018 to 2019, and compared them with the research in previous decades. The results show that the contribution of fossil sources has decreased (6–17 %) significantly, and non-fossil sources have become the main part of carbonaceous aerosols, which verified the effectiveness of air quality management.
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