Severe winter haze days in the Beijing–Tianjin–Hebei region from 1985 to 2017 and the roles of anthropogenic emissions and meteorology

Dang, Ruijun; Liao, Hong

doi:https://doi.org/10.5194/acp-19-10801-2019

Articles | Volume 19, issue 16

https://doi.org/10.5194/acp-19-10801-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Regional transport and transformation of air pollution in...

https://doi.org/10.5194/acp-19-10801-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 16

Research article

|

27 Aug 2019

Research article |

| 27 Aug 2019

Severe winter haze days in the Beijing–Tianjin–Hebei region from 1985 to 2017 and the roles of anthropogenic emissions and meteorology

Ruijun Dang and Hong Liao

Supplement

https://doi.org/10.5194/acp-19-10801-2019-supplement

Data sets

PM2.5 observations US embassy http://www.stateair.net/web/post/1/1.html

GSOD visibility dataset NCDC https://www7.ncdc.noaa.gov/CDO/cdoselect.cmd

Model code and software

GEOS-Chem model Harvard University http://acmg.seas.harvard.edu/geos/

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Short summary

We used a global chemical transport model to examine the historical changes in severe winter haze days (SWHDs) in Beijing–Tianjin–Hebei (BTH) in China. Simulated frequency of SWHDs in BTH showed an increasing trend over 1985–2017 with obvious fluctuations. We found that meteorology has dominated the frequency decrease in 1992–2001, and both anthropogenic emissions and meteorology contributed to the increase in 2003–2012. These results have important implications for the control of SWHDs in BTH.