globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117429
Atmospheric nitrous acid (HONO) at a rural coastal site in North China: Seasonal variations and effects of biomass burning
Author: Gu R.; Zheng P.; Chen T.; Dong C.; Wang Y.; Liu Y.; Liu Y.; Luo Y.; Han G.; Wang X.; Zhou X.; Wang T.; Wang W.; Xue L.
Source Publication: Atmospheric Environment
ISSN: 1352-2310
Publishing Year: 2020
Volume: 229
Language: 英语
Keyword: Atmospheric chemistry ; Budget control ; Coastal engineering ; Image enhancement ; Photolysis ; Biomass-burning ; Coastal sites ; Daytime budgets ; Field studies ; Formation mechanism ; Harvest season ; Hydroxyl radicals ; Seasonal variation ; Inorganic acids ; nitrous acid ; atmospheric chemistry ; biomass burning ; concentration (composition) ; formation mechanism ; hydroxyl radical ; nitrous acid ; photolysis ; rural area ; seasonal variation ; aerosol ; Article ; atmosphere ; biomass ; biomass burning ; budget ; circadian rhythm ; combustion ; ecological procedures ; field study ; harvest ; meteorology ; photochemistry ; photolysis ; priority journal ; rural area ; seashore ; seasonal variation ; spring ; summer ; winter ; China
Subject Area: Biomass burning ; Hydroxyl radical ; Nitrous acid ; North China ; Seasonal variation
Abstract: Nitrous acid (HONO) plays a significant role in atmospheric chemistry due to its contribution to hydroxyl radical (OH). However, no scientific consensus has been achieved about the daytime HONO formation mechanisms. To identify the seasonal variations of HONO chemistry and the impacts of biomass burning (BB), we performed a two-phased field study in winter-spring and summer (covering a harvest season) in 2017 at a rural coastal site in North China. Though the mean HONO concentration in winter-spring (0.26 ± 0.28 ppbv) was higher than in summer (0.17 ± 0.19 ppbv), the maximum HONO concentrations were comparable (~2 ppbv) in the two campaigns. Both the HONO/NOx ratio and nocturnal heterogeneous conversion efficiency of HONO (CHONO) in summer were over twice of that in winter-spring. The daytime budget analysis also revealed that the strength of Pother (i.e., the HONO sources apart from the reaction of OH + NO) in summer was double of that in winter-spring. BB affected the HONO concentration by enhancing the contribution of heterogeneous HONO production on the aerosol surface but weakening the role of photo-related HONO formation. HONO photolysis was a significant source of OH in both winter-spring and summer, and its contribution could be further enhanced during the BB episode in summer. Our study demonstrates the significant seasonal variations of HONO and the effects of BB, and suggests needs for more multi-season observations and considerations of BB, especially during the harvest time, in HONO research. © 2020 Elsevier Ltd
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被引频次[WOS]:2   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化与战略

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Affiliation: Environment Research Institute, Shandong University, Qingdao, 266237, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong99907, China; Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China; Ji'nan Institute of Environmental Science, Ji'nan, 250100, China

Recommended Citation:
Gu R.,Zheng P.,Chen T.,et al. Atmospheric nitrous acid (HONO) at a rural coastal site in North China: Seasonal variations and effects of biomass burning[J]. Atmospheric Environment,2020-01-01,229
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