TY - JOUR A1 - Liu, M. A1 - Huang, X. A1 - Song, Y. A1 - Xu, T. A1 - Wang, S. A1 - Wu, Z. A1 - Hu, M. A1 - Zhang, L. A1 - Zhang, Q. A1 - Pan, Y. A1 - Liu, X. A1 - Zhu, T. T1 - Rapid SO2 emission reductions significantly increase tropospheric ammonia concentrations over the North China Plain JO - Atmos. Chem. Phys. J1 - ACP VL - 18 IS - 24 SP - 17933 EP - 17943 Y1 - 2018/12/18 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/18/17933/2018/ L1 - https://acp.copernicus.org/articles/18/17933/2018/acp-18-17933-2018.pdf DO - 10.5194/acp-18-17933-2018 ER -