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Discussion papers | Copyright
https://doi.org/10.5194/acp-2018-896
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 12 Sep 2018

Research article | 12 Sep 2018

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

High efficiency of livestock ammonia emission controls on alleviating particulate nitrate during a severe winter haze episode in northern China

Zhenying Xu1, Mingxu Liu1, Yu Song1, Shuxiao Wang2, Lin Zhang3, Tingting Xu1, Tiantian Wang1, Caiqing Yan1, Tian Zhou1, Yele Sun4, Yuepeng Pan4, Min Hu1, Mei Zheng1, and Tong Zhu1 Zhenying Xu et al.
  • 1State Key Joint Laboratory of Environmental Simulation and Pollution Control, Department of Environmental Science, Peking University, Beijing, 100871, China
  • 2State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
  • 3Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China
  • 4State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Abstract. Although nitrogen oxide (NOx) emission controls have been implemented for several years in northern China, recent observations show particulate nitrate (NO3) is becoming increasingly important during haze episodes. In this study, we find that particulate NO3 formation would easily become NH3-limited under severe haze conditions, enhancing its sensitivity to NH3 emission controls. Furthermore, improved manure management of livestock husbandry could reduce 40% of NH3 emissions (currently 100 kiloton per a month) in winter of northern China. Under this emission reductions scenario, simulations from the thermodynamic equilibrium model (ISORROPIA-II) and the Weather Research and Forecast model coupled chemistry (WRF-Chem) all show that particulate NO3 could be reduced by approximately 40% during a typical severe haze episode (averagely from 40.8 to 25.7μg/m3). Our results indicate that reducing livestock NH3 emissions would be highly effective to reduce particulate NO3 during severe winter haze events.

Zhenying Xu et al.
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