气候变化领域集成服务门户(CCPortal): Measurement report: Aircraft observations of ozone, nitrogen oxides, and volatile organic compounds over Hebei Province, China

CCPortal

DOI	10.5194/acp-20-14523-2020
	Measurement report: Aircraft observations of ozone, nitrogen oxides, and volatile organic compounds over Hebei Province, China
	E. Benish S.; He H.; Ren X.; J. Roberts S.; J. Salawitch R.; Li Z.; Wang F.; Wang Y.; Zhang F.; Shao M.; Lu S.; R. Dickerson R.
发表日期	2020
ISSN	1680-7316
起始页码	14523
结束页码	14545
卷号	20 期号:23
英文摘要	To provide insight into the planetary boundary layer (PBL) production of ozone (O3) over the North China Plain, the Air chemistry Research in Asia (ARIAs) campaign conducted aircraft measurements of air pollutants over Hebei Province, China, between May and June 2016. We evaluate vertical profiles of trace gas species including O3, nitrogen oxides (NOx), carbon monoxide (CO), and volatile organic compounds (VOCs) and relate to rates of O3 production. This analysis shows measured O3 levels ranged from 45 to 146 ppbv, with the peak median concentration (92 ppbv) occurring between 1000 and 1500 m. The NOx concentrations exhibited strong spatial and altitudinal variations, with a maximum of 53 ppbv. Ratios of CO=CO2 indicate the prevalence of low-efficiency combustion from biomass burning and residential coal burning but indicate some success of regional pollution controls compared to earlier studies in China. Concentrations of total measured VOCs reveal alkanes dominate the total measured volume mixing ratio of VOCs (68%), and sources include vehicular emissions, fuel and solvent evaporation, and biomass burning. Alkanes and alkenes/alkynes are responsible for 74% of the total VOC reactivity assessed by calculating the OH loss rates, while aromatics contribute the most to the total ozone formation potential (OFP) (43%) with toluene, m/p-xylene, ethylene, propylene, and i-pentane playing significant roles in the aloft production of O3 in this region. In the PBL below 500 m, box model calculations constrained by measured precursors indicate the peak rate of mean O3 production was 7 ppbvh-1. Pollution frequently extended above the PBL into the lower free troposphere around 3000 m, where NO2 mixing ratios (400 pptv) led to net production rates of O3 up to 3 ppbvh-1; this pollution can travel substantial distances downwind. The O3 sensitivity regime is determined to be NOx-limited throughout the PBL, whereas it is more VOC-limited at low altitudes near urban centers, demonstrating that control of both VOCs and NOx is needed to reduce aloft O3 pollution over Hebei. © Author(s) 2020.
语种	英语
scopus关键词	airborne survey; atmospheric pollution; boundary layer; concentration (composition); nitrogen oxides; ozone; volatile organic compound; China; Hebei
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/247329
作者单位	Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD 20742, United States; Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, MD 20740, United States; Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, United States; State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China; Key Laboratory for Cloud Physics, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, 21004, China; College of Environmental Science and Engineering, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	E. Benish S.,He H.,Ren X.,et al. Measurement report: Aircraft observations of ozone, nitrogen oxides, and volatile organic compounds over Hebei Province, China[J],2020,20(23).
APA	E. Benish S..,He H..,Ren X..,J. Roberts S..,J. Salawitch R..,...&R. Dickerson R..(2020).Measurement report: Aircraft observations of ozone, nitrogen oxides, and volatile organic compounds over Hebei Province, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(23).
MLA	E. Benish S.,et al."Measurement report: Aircraft observations of ozone, nitrogen oxides, and volatile organic compounds over Hebei Province, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.23(2020).