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Discussion papers
https://doi.org/10.5194/acp-2018-968
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-968
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 21 Sep 2018

Research article | 21 Sep 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Increased inorganic aerosol fraction contributes to air pollution and haze in China

Yonghong Wang1,2, Yuesi Wang1,6, Lili Wang1, Tuukka Petäjä2,3, Qiaozhi Zha2, Chongshui Gong1,4, Sixuan Li7, Bo Hu1, Jinyuan Xin1, and Markku Kulmala2,3,5 Yonghong Wang et al.
  • 1State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
  • 2Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, 00014 University of Helsinki, Helsinki, Finland
  • 3Joint international research Laboratory of Atmospheric and Earth SysTem sciences (JirLATEST), Nanjing University, Nanjing, China
  • 4Institute of Arid meteorology, China Meteorological Administration, Lanzhou 730000, China
  • 5Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology (BUCT), Beijing, China
  • 6Centre for Excellence in Atmospheric Urban Environment, Institute of Urban Environment, Chinese Academy of Science, Xiamen, Fujian 361021, China
  • 7State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Abstract. The detailed formation mechanism of increased number of haze events in China is still not very clear. Here, we found that reduced surface visibility and an increase in satellite derived columnar concentration of inorganic precursor concentrations are connected with each other. Typically higher inorganic mass fractions lead to increased aerosol water uptake and light scattering ability in elevated relative humidity. Satellite observation of aerosol precursors of NO2 and SO2 showed increased concentrations during study period. Our in-situ measurement of aerosol chemical composition in Beijing also confirmed increased contribution of inorganic aerosol fraction as a function of increased particle pollution level. Our investigations demonstrate that the increased inorganic fraction in the aerosol particles is a key component in the frequently occurring haze days during studying period, and particularly the reduction of nitrate, sulfate and their precursor gases would contribute towards better air quality in China.

Yonghong Wang et al.
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Satellite observation combined with in-situ measurements demonstrate that increased inorganic aerosol fraction of NO2, SO2 contributes to air pollution and frequently occurring of haze in China. Currently, the reduction of nitrate, sulfate and their precursor gases would contribute towards better air quality in China.
Satellite observation combined with in-situ measurements demonstrate that increased inorganic...
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