Exploration of the atmospheric chemistry of nitrous acid in a coastal city of southeastern China: results from measurements across four seasons

doi:10.5194/acp-22-371-2022

	Exploration of the atmospheric chemistry of nitrous acid in a coastal city of southeastern China: results from measurements across four seasons
	Hu, Baoye 2,3,4,5; Duan, Jun 6; Hong, Youwei 2,3; Xu, Lingling 2,3; Li, Mengren 2,3; Bian, Yahui 2,3; Qin, Min 6; Fang, Wu 6; Xie, Pinhua 1,2,6,7; Chen, Jinsheng 2,3
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2022-01-11
卷号	22
ISSN号	1680-7316
DOI	10.5194/acp-22-371-2022
通讯作者	Qin, Min(mqin@aiofm.ac.cn) ; Chen, Jinsheng(jschen@iue.ac.cn)
英文摘要	Because nitrous acid (HONO) photolysis is a key source of hydroxyl (OH) radicals, identifying the atmospheric sources of HONO is essential to enhance the understanding of atmospheric chemistry processes and improve the accuracy of simulation models. We performed seasonal field observations of HONO in a coastal city of southeastern China, along with measurements of trace gases, aerosol compositions, photolysis rate constants (J), and meteorological parameters. The results showed that the average observed concentration of HONO was 0.54 +/- 0.47 ppb. Vehicle exhaust emissions contributed an average of 1.45 % to HONO, higher than the values found in most other studies, suggesting an influence from diesel vehicle emissions. The mean conversion frequency of NO2 to HONO in the nighttime was the highest in summer due to water droplets evaporating under high-temperature conditions. Based on a budget analysis, the rate of emission from unknown sources (R-unknown) was highest around midday, with values of 4.51 ppb h(-1) in summer, 3.51 ppb h(-1) in spring, 3.28 ppb h(-1) in autumn, and 2.08 ppb h(-1) in winter. Unknown sources made up the largest proportion of all sources in summer (81.25 %), autumn (73.99 %), spring (70.87 %), and winter (59.28 %). The photolysis of particulate nitrate was probably a source in spring and summer while the conversion from NO2 to HONO on BC enhanced by light was perhaps a source in autumn and winter. The variation of HONO at night can be exactly simulated based on the HONO / NOx ratio, while the J(NO3-_R) x pNO(3)(-) should be considered for daytime simulations in summer and autumn, or 1/4x (J(NO3-_R) x pNO(3)(-)) in spring and winter. Compared with O-3 photolysis, HONO photolysis has long been an important source of OH except for summer afternoons. Observation of HONO across four seasons with various auxiliary parameters improves the comprehension of HONO chemistry in southeastern coastal China.
资助项目	National Key Research and Development Program of China[2017YFC0209400] ; National Key Research and Development Program of China[2016YFC02005] ; National Key Research and Development Program of China[2016YFC0112200] ; National Natural Science Foundation of China[41575146] ; National Natural Science Foundation of China[41875154] ; Cultivating Project of Strategic Priority Research Program of the Chinese Academy of Sciences[XDPB1903] ; FJIRSM&IUE Joint Research Fund[RHZX-2019-006] ; Center for Excellence in Regional Atmospheric Environment, CAS[E0L1B20201]
WOS关键词	ENHANCED ABSORPTION SPECTROMETER ; HONO DAYTIME SOURCE ; URBAN ATMOSPHERE ; NORTH CHINA ; HETEROGENEOUS PRODUCTION ; OXIDATION CAPACITY ; NITRATE PHOTOLYSIS ; VERTICAL PROFILES ; VEHICLE EMISSIONS ; RURAL SITE
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000743986900001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Cultivating Project of Strategic Priority Research Program of the Chinese Academy of Sciences ; FJIRSM&IUE Joint Research Fund ; Center for Excellence in Regional Atmospheric Environment, CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127337]
专题	中国科学院合肥物质科学研究院
通讯作者	Qin, Min; Chen, Jinsheng
作者单位	1.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China 4.Minnan Normal Univ, Fujian Prov Key Lab Pollut Monitoring & Control, Zhangzhou 363000, Peoples R China 5.Minnan Normal Univ, Fujian Prov Key Lab Modern Analyt Sci & Separat T, Zhangzhou 363000, Peoples R China 6.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100086, Peoples R China
推荐引用方式 GB/T 7714	Hu, Baoye,Duan, Jun,Hong, Youwei,et al. Exploration of the atmospheric chemistry of nitrous acid in a coastal city of southeastern China: results from measurements across four seasons[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2022,22.
APA	Hu, Baoye.,Duan, Jun.,Hong, Youwei.,Xu, Lingling.,Li, Mengren.,...&Chen, Jinsheng.(2022).Exploration of the atmospheric chemistry of nitrous acid in a coastal city of southeastern China: results from measurements across four seasons.ATMOSPHERIC CHEMISTRY AND PHYSICS,22.
MLA	Hu, Baoye,et al."Exploration of the atmospheric chemistry of nitrous acid in a coastal city of southeastern China: results from measurements across four seasons".ATMOSPHERIC CHEMISTRY AND PHYSICS 22(2022).