气候变化领域集成服务门户(CCPortal): The changing role of organic nitrates in the removal and transport of NO<i>x</i>

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DOI	10.5194/acp-20-267-2020
	The changing role of organic nitrates in the removal and transport of NOx
	Romer Present P.S.; Zare A.; Cohen R.C.
发表日期	2020
ISSN	16807316
起始页码	267
结束页码	279
卷号	20 期号:1
英文摘要	A better understanding of the chemistry of nitrogen oxides (NOx) is crucial to effectively reducing air pollution and predicting future air quality. The response of NOx lifetime to perturbations in emissions or in the climate system is set in large part by whether NOx loss occurs primarily by the direct formation of HNO3 or through the formation of alkyl and multifunctional nitrates (RONO2). Using 15 years of detailed in situ observations, we show that in the summer daytime continental boundary layer the relative importance of these two pathways can be well approximated by the relative likelihood that OH will react with NO2 or instead with a volatile organic compound (VOC). Over the past decades, changes in anthropogenic emissions of both NOx and VOCs have led to a significant increase in the overall importance of RONO2 chemistry to NOx loss. We find that this shift is associated with a decreased effectiveness of NOx emissions reductions on ozone production in polluted areas and increased transport of NOx from source to receptor regions. This change in chemistry, combined with changes in the spatial pattern of NOx emissions, is observed to be leading to a flatter distribution of NO2 across the United States, potentially transforming ozone air pollution from a local issue into a regional one. © 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
关键词	atmospheric chemistry atmospheric pollution boundary layer in situ measurement nitrate nitrogen oxides ozone summer volatile organic compound United States
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132313
推荐引用方式 GB/T 7714	Romer Present P.S.,Zare A.,Cohen R.C.. The changing role of organic nitrates in the removal and transport of NOx[J]. Atmospheric Chemistry and Physics,2020,20(1).
APA	Romer Present P.S.,Zare A.,&Cohen R.C..(2020).The changing role of organic nitrates in the removal and transport of NOx.,20(1).
MLA	Romer Present P.S.,et al."The changing role of organic nitrates in the removal and transport of NOx".20.1(2020).