气候变化领域集成服务门户(CCPortal): Evidence for an Oceanic Source of Methyl Ethyl Ketone to the Atmosphere

CCPortal

DOI	10.1029/2019GL086045
	Evidence for an Oceanic Source of Methyl Ethyl Ketone to the Atmosphere
	Brewer J.F.; Fischer E.V.; Commane R.; Wofsy S.C.; Daube B.C.; Apel E.C.; Hills A.J.; Hornbrook R.S.; Barletta B.; Meinardi S.; Blake D.R.; Ray E.A.; Ravishankara A.R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Methyl ethyl ketone (MEK) is a relatively abundant but understudied oxygenated volatile organic compound that can serve as a source of both HOx and PAN when photooxidized. We use aircraft observations of MEK from the remote marine troposphere to show that the ocean serves as a source of MEK to the atmosphere during both meteorological winter and summer. There is pronounced seasonality in the MEK profiles in the extratropical troposphere, with higher MEK mixing ratios observed in summer than in winter. MEK in clean air over the remote oceans correlates with both acetone and acetaldehyde, whose primary sources in the ocean water are the photooxidation of organic material. We show that even a small (>1 nM) concentration of MEK in surface waters is sufficient to allow the ocean to be a net source of MEK to the atmosphere over ocean basins across multiple seasons. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Acetone; Ketones; Photooxidation; Troposphere; Volatile organic compounds; Air-sea exchange; Aircraft observations; Atmospheric oxidation; Marine biogeochemistries; Methyl ethyl ketones; Organic materials; Primary sources; Trace gas; Oceanography; acetaldehyde; acetone; air-sea interaction; ketone; mixing ratio; oxygenation; photooxidation; trace gas; troposphere; volatile organic compound; winter
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/170654
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Chemistry, Colorado State University, Fort Collins, CO, United States; Department of Earth and Environmental Sciences, Lamont-Doherty Earth Observatory and Columbia University, Palisades, NY, United States; Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Department of Chemistry, University of California, Irvine, Irvine, CA, United States; Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Brewer J.F.,Fischer E.V.,Commane R.,et al. Evidence for an Oceanic Source of Methyl Ethyl Ketone to the Atmosphere[J],2020,47(4).
APA	Brewer J.F..,Fischer E.V..,Commane R..,Wofsy S.C..,Daube B.C..,...&Ravishankara A.R..(2020).Evidence for an Oceanic Source of Methyl Ethyl Ketone to the Atmosphere.Geophysical Research Letters,47(4).
MLA	Brewer J.F.,et al."Evidence for an Oceanic Source of Methyl Ethyl Ketone to the Atmosphere".Geophysical Research Letters 47.4(2020).