TY - JOUR A1 - Ansmann, A. A1 - Baars, H. A1 - Chudnovsky, A. A1 - Mattis, I. A1 - Veselovskii, I. A1 - Haarig, M. A1 - Seifert, P. A1 - Engelmann, R. A1 - Wandinger, U. T1 - Extreme levels of Canadian wildfire smoke in the stratosphere over central Europe on 21–22 August 2017 JO - Atmos. Chem. Phys. J1 - ACP VL - 18 IS - 16 SP - 11831 EP - 11845 Y1 - 2018/08/20 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/18/11831/2018/ L1 - https://acp.copernicus.org/articles/18/11831/2018/acp-18-11831-2018.pdf DO - 10.5194/acp-18-11831-2018 ER -