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 - Zhu, T. T1 - Rapid SO2 emission reductions significantly increase tropospheric ammonia concentrations over the North China Plain JO - Atmos. Chem. Phys. Discuss. J1 - ACPD VL - 2018 SP - 1 EP - 19 Y1 - 2018/09/05 PB - Copernicus Publications SN - 1680-7375 UR - https://acp.copernicus.org/preprints/acp-2018-880/ L1 - https://acp.copernicus.org/preprints/acp-2018-880/acp-2018-880.pdf DO - 10.5194/acp-2018-880 ER -