TY  - Data
T1  - Data and codes for the paper "Chloramine chemistry as a missing link in atmospheric chlorine cycling"
A1  - Jiang Jingkun
A1  - Chen Yijing
A1  - Xia Men
A1  - Zhang Jinghui
A1  - Epameinondas Tsiligiannis
A1  - Wu Cheng
A1  - Yan Chao
A1  - Cai Runlong
A1  - Zheng Guangqing
A1  - Li Yuyang
A1  - Guo Junchen
A1  - An Zhaojin
A1  - Li Yiran
A1  - Zhao Xinyan
A1  - Qu Qipeng
A1  - Hua Chenjie
A1  - Wang Zongcheng
A1  - WANG Shuxiao
A1  - Liu Yongchun
A1  - Cao Lina
A1  - He Kebin
A1  - Markku Kulmala
A1  - Mattias Hallquist
A1  - Wang Tao
A1  - Douglas Worsnop
DO  - 10.12072/ncdc.atmosphere.db7322.2026
PY  - 2026
DA  - 2026-05-11
PB  - National Cryosphere Desert Data Center
AB  - Chlorine radicals (Cl·) profoundly affect atmospheric oxidation capacity. Chloramines, especially trichloramine, are emerging precursors of Cl·. However, their sources and roles in the atmosphere remain elusive. This study presents field evidence of primary emissions and explicit secondary production pathways of atmospheric trichloramine in Beijing, supplemented by observations from New Delhi and reanalysis of measurements in Toronto. We demonstrate that the sequential chlorination reactions initiated by molecular chlorine and ammonia in atmospheric aerosols are a major source of trichloramine. The trichloramine produced in aerosols is a source of gaseous trichloramine and serves as an intermediate during the conversion from molecular chlorine to Cl·, while direct trichloramine emissions constitute a previously overlooked source of Cl·. Overall, chloramine chemistry alters the Cl· production mechanism and represents a crucial missing pathway to Cl· worldwide.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/873a775f-8280-417a-ae11-1ccf638db83f
ER  -