Measurement Report: Aircraft Observations of Ozone, Nitrogen Oxides, and Volatile Organic Compounds over Hebei Province, China

doi:10.5194/acp-2020-194

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-194
	Measurement Report: Aircraft Observations of Ozone, Nitrogen Oxides, and Volatile Organic Compounds over Hebei Province, China
	Sarah E. Benish, Hao He, Xinrong Ren, Sandra J. Roberts, Ross J. Salawitch, Zhangqing Li, Fei Wang, Yuying Wang, Fang Zhang, Min Shao, Sihua Lu, and Russell R. Dickerson
	2020-04-27
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
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 (NO_x), carbon monoxide (CO), and volatile organic compounds (VOCs) and relate to rates of O₃ production. This analysis shows measured O₃ levels ranged from 52 to 142 ppbv, with the peak median concentration (~ 94 ppbv) occurring between 1000 and 1500 m. The NO_x concentrations exhibited strong spatial and altitudinal variations, ranging from 0.15 to 49 ppbv. Ratios of CO / NO_y and CO / CO₂ indicate the prevalence of low efficiency combustion from biomass burning and residential coal burning. Concentrations of total measured VOCs from 26 whole air canisters reveals alkanes dominate the total measured volume mixing ratio of VOCs (68 %) and we see evidence of vehicular emissions, fuel and solvent evaporation, and biomass burning sources. 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 ppbv/hour. 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 ppbv/hour; this pollution can travel substantial distances downwind. The O₃ sensitivity regime is determined to be NO_x-limited throughout the PBL, while more VOC-limited at low altitudes near urban centres, demonstrating both VOCs and NO_x need further control to reduce aloft O₃ over Hebei.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/248912
专题	地球科学
推荐引用方式 GB/T 7714	Sarah E. Benish, Hao He, Xinrong Ren, Sandra J. Roberts, Ross J. Salawitch, Zhangqing Li, Fei Wang, Yuying Wang, Fang Zhang, Min Shao, Sihua Lu, and Russell R. Dickerson. Measurement Report: Aircraft Observations of Ozone, Nitrogen Oxides, and Volatile Organic Compounds over Hebei Province, China[J]. Atmospheric Chemistry and Physics,2020.
APA	Sarah E. Benish, Hao He, Xinrong Ren, Sandra J. Roberts, Ross J. Salawitch, Zhangqing Li, Fei Wang, Yuying Wang, Fang Zhang, Min Shao, Sihua Lu, and Russell R. Dickerson.(2020).Measurement Report: Aircraft Observations of Ozone, Nitrogen Oxides, and Volatile Organic Compounds over Hebei Province, China.Atmospheric Chemistry and Physics.
MLA	Sarah E. Benish, Hao He, Xinrong Ren, Sandra J. Roberts, Ross J. Salawitch, Zhangqing Li, Fei Wang, Yuying Wang, Fang Zhang, Min Shao, Sihua Lu, and Russell R. Dickerson."Measurement Report: Aircraft Observations of Ozone, Nitrogen Oxides, and Volatile Organic Compounds over Hebei Province, China".Atmospheric Chemistry and Physics (2020).