气候变化领域集成服务门户(CCPortal): Sources of nitrous acid (HONO) in the upper boundary layer and lower free troposphere of the North China Plain: Insights from the Mount Tai Observatory

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DOI	10.5194/acp-20-12115-2020
	Sources of nitrous acid (HONO) in the upper boundary layer and lower free troposphere of the North China Plain: Insights from the Mount Tai Observatory
	Jiang Y.; Xue L.; Gu R.; Jia M.; Zhang Y.; Wen L.; Zheng P.; Chen T.; Li H.; Shan Y.; Zhao Y.; Guo Z.; Bi Y.; Liu H.; Ding A.; Zhang Q.; Wang W.
发表日期	2020
ISSN	16807316
起始页码	12115
结束页码	12131
卷号	20 期号:20
英文摘要	Nitrous acid (HONO) is a significant precursor of atmospheric "detergent"OH radicals and plays a vital role in tropospheric chemistry. The current knowledge about daytime HONO sources is incomplete, and its impact on the tropospheric radical chemistry has not been fully quantified. Existing observational studies of HONO were mostly conducted at the surface, with few efforts focusing on the highelevation atmosphere. In order to better understand the characteristics and sources of HONO in the upper boundary layer and lower free troposphere, two intensive field observations were carried out at the summit of Mt. Tai (1534 m a.s.l.), the peak of the North China Plain (NCP), in winter 2017 and spring 2018. HONO showed moderate concentration levels (average ± standard deviation: 0:15 ± 0:15 and 0:13 ± 0:15 ppbv), with maximum values of 1.14 and 3.23 ppbv in winter and spring, respectively. Diurnal variation patterns with broad noontime maxima and lower nighttime concentrations were observed during both campaigns, which is distinct from most of the previous studies at the ground level. The Lagrangian particle dispersion model (LPDM, WRFFLEXPART v3.3) simulations indicated the combined effects of the planetary boundary layer evolution and valley breeze on the daytime HONO peak. A photostationary state (PSS) analysis suggested a strong unknown daytime HONO source with production rates of 0:45±0:25 ppb h-1 in winter and 0:64 ± 0:49 ppb h-1 in spring. Correlation analysis supported the important role of photo-enhanced heterogeneous conversion of NO2 to HONO on the aerosol surface at this high-elevation site. HONO photolysis is the predominant primary source of OH radical and plays a major role in the radical chemistry at Mt. Tai. The model only considering a homogenous HONO source predicted much lower levels of the HOx radicals and atmospheric oxidation capacity than the model constrained with measured HONO data. This study sheds light on the characteristics, sources, chemistry, and impacts of HONO in the upper boundary layer and lower free troposphere in the NCP region. © 2020 Author(s).
语种	英语
scopus关键词	atmospheric chemistry; boundary layer; diurnal activity; hydroxyl radical; nitric acid; photolysis; troposphere; China; North China Plain; Shandong; Tai Shan
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143884
作者单位	Environment Research Institute, Shandong University, Qingdao, Shandong, 266237, China; School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China; Taishan National Reference Climatological Station, Tai'an, Shandong, 271000, China; Collaborative Innovation Center for Climate Change, Jiangsu Province, Nanjing, 210023, China
推荐引用方式 GB/T 7714	Jiang Y.,Xue L.,Gu R.,et al. Sources of nitrous acid (HONO) in the upper boundary layer and lower free troposphere of the North China Plain: Insights from the Mount Tai Observatory[J],2020,20(20).
APA	Jiang Y..,Xue L..,Gu R..,Jia M..,Zhang Y..,...&Wang W..(2020).Sources of nitrous acid (HONO) in the upper boundary layer and lower free troposphere of the North China Plain: Insights from the Mount Tai Observatory.Atmospheric Chemistry and Physics,20(20).
MLA	Jiang Y.,et al."Sources of nitrous acid (HONO) in the upper boundary layer and lower free troposphere of the North China Plain: Insights from the Mount Tai Observatory".Atmospheric Chemistry and Physics 20.20(2020).