气候变化领域集成服务门户(CCPortal): Evidence of Nighttime Production of Organic Nitrates During SEAC4RS; FRAPPÉ; and KORUS-AQ

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DOI	10.1029/2020GL087860
	Evidence of Nighttime Production of Organic Nitrates During SEAC4RS; FRAPPÉ; and KORUS-AQ
	Kenagy H.S.; Sparks T.L.; Wooldridge P.J.; Weinheimer A.J.; Ryerson T.B.; Blake D.R.; Hornbrook R.S.; Apel E.C.; Cohen R.C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	Organic nitrates (RONO2) are an important NOx sink. In warm, rural environments dominated by biogenic emissions, nocturnal NO3-initiated production of RONO2 is competitive with daytime OH-initiated RONO2 production. However, in urban areas, OH-initiated production of RONO2 has been assumed dominant and NO3-initiated production considered negligible. We show evidence for nighttime RONO2 production similar in magnitude to daytime production during three aircraft campaigns in chemically distinct summertime environments: Studies of Emissions and Atmospheric Composition, Clouds, and Climate Coupling by Regional Surveys (SEAC4RS) in the rural Southeastern United States, Front Range Air Pollution and Photochemistry Experiment (FRAPPÉ) in the Colorado Front Range, and Korea-United States Air Quality Study (KORUS-AQ) around the megacity of Seoul. During each campaign, morning observations show RONO2 enhancements at constant, near-background Ox (≡ O3+NO2) concentrations, indicating that the RONO2 are from a non-photochemical source, whereas afternoon observations show a strong correlation between RONO2 and Ox resulting from photochemical production. We show that there are sufficient precursors for nighttime RONO2 formation during all three campaigns. This evidence impacts our understanding of nighttime NOx chemistry. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Air quality; Atmospheric composition; Nitrogen oxides; Surveys; Biogenic emission; Colorado Front Range; Organic nitrates; Photochemical production; Photochemical sources; Regional surveys; Rural environment; Strong correlation; Nitrates; air quality; airborne survey; atmospheric pollution; biogenic emission; concentration (composition); hydroxide; megacity; nitric oxide; organic nitrogen; photochemistry; urban atmosphere; Colorado; Front Range; Rocky Mountains; Seoul [South Korea]; South Korea; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170307
作者单位	Department of Chemistry, University of California, Berkeley, CA, United States; Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States; Department of Chemistry, University of California, Irvine, CA, United States; Department of Earth and Planetary Science, University of California, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Kenagy H.S.,Sparks T.L.,Wooldridge P.J.,et al. Evidence of Nighttime Production of Organic Nitrates During SEAC4RS; FRAPPÉ; and KORUS-AQ[J],2020,47(11).
APA	Kenagy H.S..,Sparks T.L..,Wooldridge P.J..,Weinheimer A.J..,Ryerson T.B..,...&Cohen R.C..(2020).Evidence of Nighttime Production of Organic Nitrates During SEAC4RS; FRAPPÉ; and KORUS-AQ.Geophysical Research Letters,47(11).
MLA	Kenagy H.S.,et al."Evidence of Nighttime Production of Organic Nitrates During SEAC4RS; FRAPPÉ; and KORUS-AQ".Geophysical Research Letters 47.11(2020).