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High-resolution vertical distribution and sources of HONO and NO2 in the nocturnal boundary layer in urban Beijing, China

文献类型：期刊论文

作者Meng, Fanhao1,2; Qin, Min2; Tang, Ke1,2; Duan, Jun2; Fang, Wu2; Liang, Shuaixi1,2; Ye, Kaidi1,2; Xie, Pinhua1,2,3,5; Sun, Yele3,4,5; Xie, Conghui4
刊名ATMOSPHERIC CHEMISTRY AND PHYSICS
出版日期2020-04-29
卷号20
ISSN号1680-7316
DOI10.5194/acp-20-5071-2020
通讯作者Qin, Min(mqin@aiofm.ac.cn)
英文摘要Nitrous acid (HONO), an important precursor of the hydroxyl radical (OH), plays a key role in atmospheric chemistry, but its sources are still debated. The production of HONO on aerosol surfaces or on ground surfaces in nocturnal atmospheres remains controversial. The vertical profile provides vertical information on HONO and NO2 to understand the nocturnal HONO production and loss. In this study, we report the first high-resolution (< 2.5 m) nocturnal vertical profiles of HONO and NO2 measured from in situ instruments on a movable container that was lifted on the side wiring of a 325 m meteorological tower in Beijing, China. High-resolution vertical profiles revealed the negative gradients of HONO and NO2 in nocturnal boundary layers, and a shallow inversion layer affected the vertical distribution of HONO. The vertical distribution of HONO was consistent with stratification and layering in the nocturnal urban atmosphere below 250 m. The increase in the HONO / NO2 ratio was observed throughout the column from the clean episode to the haze episode, and relatively constant HONO/NO2 ratios in the residual layer were observed during the haze episode. Direct HONO emissions from traffic contributed 29.3 % +/- 12.4 % to the ambient HONO concentrations at night. The ground surface dominates HONO production by heterogeneous uptake of NO2 during clean episodes. In contrast, the HONO production on aerosol surfaces (30-300 ppt) explained the observed HONO increases (15-368 ppt) in the residual layer, suggesting that the aerosol surface dominates HONO production aloft during haze episodes, while the surface production of HONO and direct emissions into the overlying air are minor contributors. Average dry deposition rates of 0.74 +/- 0.31 and 1.55 +/- 0.32 ppb h(-1) were estimated during the clean and haze episodes, respectively, implying that significant quantities of HONO could be deposited to the ground surface at night. Our results highlight the ever-changing contributions of aerosol and ground surfaces in nocturnal HONO production at different pollution levels and encourage more vertical gradient observations to evaluate the contributions from varied HONO sources.
WOS关键词NITROUS-ACID HONO ; RELATIVE-HUMIDITY DEPENDENCE ; IN-SITU MEASUREMENTS ; GAS-PHASE SOURCE ; HETEROGENEOUS PRODUCTION ; ATMOSPHERIC CHEMISTRY ; PHOTOENHANCED UPTAKE ; PARTICULATE NITRATE ; DAYTIME SOURCE ; SUBURBAN SITE
资助项目National Natural Science Foundation of China[91544104] ; National Natural Science Foundation of China[41571130023] ; National Natural Science Foundation of China[41875154] ; National Key R&D Program of China[2017YFC0209400] ; National Key R&D Program of China[2016YFC0208204] ; Science and Technology Major Special Project of Anhui Province, China[16030801120]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000531519600001
出版者COPERNICUS GESELLSCHAFT MBH
资助机构National Natural Science Foundation of China ; National Key R&D Program of China ; Science and Technology Major Special Project of Anhui Province, China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/103259]  
专题中国科学院合肥物质科学研究院
通讯作者Qin, Min
作者单位1.Univ Sci & Technol China, Hefei 230027, Peoples R China
2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China
7.Tianjing Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
推荐引用方式
GB/T 7714		 Meng, Fanhao,Qin, Min,Tang, Ke,et al. High-resolution vertical distribution and sources of HONO and NO2 in the nocturnal boundary layer in urban Beijing, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20.
APA Meng, Fanhao.,Qin, Min.,Tang, Ke.,Duan, Jun.,Fang, Wu.,...&Liu, Wenqing.(2020).High-resolution vertical distribution and sources of HONO and NO2 in the nocturnal boundary layer in urban Beijing, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,20.
MLA Meng, Fanhao,et al."High-resolution vertical distribution and sources of HONO and NO2 in the nocturnal boundary layer in urban Beijing, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 20(2020).

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来源：合肥物质科学研究院

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