@Article{acp-18-17933-2018,
AUTHOR = {Liu, M. and Huang, X. and Song, Y. and Xu, T. and Wang, S. and Wu, Z. and Hu, M. and Zhang, L. and Zhang, Q. and Pan, Y. and Liu, X. and Zhu, T.},
TITLE = {Rapid SO$_{2}$ emission reductions significantly increase tropospheric
ammonia concentrations over the North China Plain},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {18},
YEAR = {2018},
NUMBER = {24},
PAGES = {17933--17943},
URL = {https://acp.copernicus.org/articles/18/17933/2018/},
DOI = {10.5194/acp-18-17933-2018}
}