气候变化领域集成服务门户(CCPortal): Rapidly increasing ethanol concentrations in rainwater and air

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DOI	10.1038/s41612-018-0059-z
	Rapidly increasing ethanol concentrations in rainwater and air
	Willey J.D.; Avery G.B.; Felix J.D.; Kieber R.J.; Mead R.N.; Shimizu M.S.
发表日期	2019
ISSN	23973722
卷号	2 期号:1
英文摘要	Rainwater and gas phase ethanol concentrations increased approximately fourfold between 2010 and 2017 in Wilmington, NC, USA. This 8-year study demonstrates that the gas phase and rainwater concentrations of ethanol have risen due to increased production and use of ethanol as a biofuel. Rainwater ethanol concentrations are close to equilibrium with local atmospheric gas phase concentrations and have increased in proportion to increased air concentrations. Ethanol emissions are important because they impact the oxidizing capacity of the atmosphere due to the reactivity of the alcohol towards hydroxyl radical. Gas phase ethanol contributes to air pollution through oxidation to acetaldehyde, with subsequent production of ozone, and in high NOx regions production of peroxyacetyl nitrate (PAN). However, combustion of ethanol can also lower emissions of acetaldehyde precursors such as alkenes, suggesting that the potential impact of ethanol combustion is complex. The large increase in the concentration of ethanol in both the gas and condensed phases indicates that existing sinks are not sufficient to remove the excess alcohol being added to the atmosphere from biofuel use. This suggests that the projected growth of ethanol as a biofuel will result in considerable increases in atmospheric concentrations within the next few years with direct ramifications on a host of fundamentally important atmospheric processes. © 2019, The Author(s).
语种	英语
scopus关键词	atmospheric gas; combustion; concentration (composition); ethanol; gas phase reaction; ozone; precipitation assessment; precipitation quality; rainwater; North Carolina; United States; Wilmington [North Carolina]
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178111
作者单位	Department of Chemistry and Biochemistry, University of North Carolina Wilmington, 601 S. College Road, Wilmington, NC 28403-3952, United States; Department of Physical and Environmental Science, Texas A & M University—Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX 78412, United States
推荐引用方式 GB/T 7714	Willey J.D.,Avery G.B.,Felix J.D.,et al. Rapidly increasing ethanol concentrations in rainwater and air[J],2019,2(1).
APA	Willey J.D.,Avery G.B.,Felix J.D.,Kieber R.J.,Mead R.N.,&Shimizu M.S..(2019).Rapidly increasing ethanol concentrations in rainwater and air.npj Climate and Atmospheric Science,2(1).
MLA	Willey J.D.,et al."Rapidly increasing ethanol concentrations in rainwater and air".npj Climate and Atmospheric Science 2.1(2019).