title: Reply to Comment on "Fossil Fuel Combustion-Related Emissions Dominate Atmospheric Ammonia Sources during Severe Haze Episodes: Evidence from15N-Stable Isotope in Size-Resolved Aerosol Ammonium".
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences , Beijing 100029, China.
authors.forename: Yuepeng
authors.initials: Y
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences , Beijing 100029, China.
authors.forename: Shili
authors.initials: S
authors.lastname: Tian
authors.affiliation: Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang, Liaoning 110164, China.
authors.forename: Dongwei
authors.initials: D
authors.lastname: Liu
authors.affiliation: Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang, Liaoning 110164, China.
authors.forename: Yunting
authors.initials: Y
authors.lastname: Fang
authors.affiliation: National Climate Center, China Meteorological Administration, Beijing 100081, China.
authors.forename: Xiaying
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Ministry of Education Key Laboratory for Earth System Modeling, Center for Earth System Science, Tsinghua University , Beijing 100084, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Ministry of Education Key Laboratory for Earth System Modeling, Center for Earth System Science, Tsinghua University , Beijing 100084, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zheng
authors.affiliation: Department of Chemistry, Purdue University , 560 Oval Drive, West Lafayette, Indiana 47907, United States.
authors.forename: Greg
authors.initials: G
authors.lastname: Michalski
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences , Beijing 100029, China.
authors.forename: Yuesi
authors.initials: Y
authors.lastname: Wang