Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL083044 |
Hydrocarbon Removal in Power Plant Plumes Shows Nitrogen Oxide Dependence of Hydroxyl Radicals | |
de Gouw, J. A.1,2,3; Parrish, D. D.1,2; Brown, S. S.1; Edwards, P.1,2,4; Gilman, J. B.1; Graus, M.1,2,5; Hanisco, T. F.6; Kaiser, J.7,8,9; Keutsch, F. N.7,8; Kim, S. -W.1,10; Lerner, B. M.1,3,11; Neuman, J. A.1,2; Nowak, J. B.1,2,12; Pollack, I. B.1,2,13; Roberts, J. M.1; Ryerson, T. B.1; Veres, P. R.1; Warneke, C.1,2; Wolfe, G. M.6,14 | |
2019-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:13页码:7752-7760 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Austria; South Korea |
英文摘要 | During an airborne study in the Southeast United States, measured mixing ratios of biogenic hydrocarbons were systematically lower in air masses containing enhanced nitrogen oxides from power plants, which we attribute to increased concentrations of hydroxyl (OH) radicals within the power plant plumes. Plume transects at successively further downwind distances provide a decreasing gradient of nitrogen oxides (NOx) concentrations, which together with the implied loss rates of isoprene, constrains the OH dependence on NOx. We find that OH concentrations were highest at nitrogen dioxide concentrations near 1-2 ppbv and decreased at higher and at lower concentrations. These findings agree with the dependence of OH on NOx concentrations expected from known chemical reactions but are not consistent with some studies reporting direct OH measurements higher than expected in regions of the atmosphere with low NOx (NO < 0.08 and NO2 < 0.46 ppbv) and high biogenic hydrocarbon emissions. Plain Language Summary Hydroxyl radicals are the main chemical species that removes trace gases from the atmosphere. They determine the atmospheric lifetime of some greenhouse gases and chemicals involved with the destruction of the stratospheric ozone layer. Hydroxyl reactions also play an important role in air pollution chemistry. Measuring hydroxyl radicals is very challenging because of their high reactivity and low concentrations. Some recent measurements have shown unexpectedly high concentrations in relatively clean conditions. In this work, we indirectly estimated the dependence of hydroxyl radicals on the concentration of nitrogen oxides downwind from power plants in the Southeast United States. We observed that mixing ratios of isoprene, a reactive hydrocarbon released from deciduous trees to the atmosphere, were systematically lower in power plant plumes, caused by higher hydroxyl radical concentrations at the elevated nitrogen oxide concentrations. These findings can be explained by known chemical reactions but are not consistent with some studies that found unexpectedly high hydroxyl concentrations in relatively clean conditions. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000476960100077 |
WOS关键词 | ATMOSPHERIC OXIDATION ; TROPOSPHERIC OH ; AIRBORNE MEASUREMENTS ; ISOPRENE ; INSTRUMENTATION ; FOREST |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/185096 |
专题 | 气候变化 |
作者单位 | 1.NOAA, Earth Syst Res Lab, Boulder, CO 80305 USA; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.Univ Colorado, Dept Chem & Biochem, Campus Box 215, Boulder, CO 80309 USA; 4.Univ York, Dept Chem, York, N Yorkshire, England; 5.Univ Innsbruck, Dept Atmospher & Cryogen Sci, Innsbruck, Austria; 6.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 7.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 8.Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA; 9.Georgia Inst Technol, Sch Environm Engn, Atlanta, GA 30332 USA; 10.Yonsei Univ, Dept Atmospher Sci, Seoul, South Korea; 11.Aerodyne Res, Billerica, MA USA; 12.NASA, Langley Res Ctr, Hampton, VA 23665 USA; 13.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA; 14.Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA |
推荐引用方式 GB/T 7714 | de Gouw, J. A.,Parrish, D. D.,Brown, S. S.,et al. Hydrocarbon Removal in Power Plant Plumes Shows Nitrogen Oxide Dependence of Hydroxyl Radicals[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(13):7752-7760. |
APA | de Gouw, J. A..,Parrish, D. D..,Brown, S. S..,Edwards, P..,Gilman, J. B..,...&Wolfe, G. M..(2019).Hydrocarbon Removal in Power Plant Plumes Shows Nitrogen Oxide Dependence of Hydroxyl Radicals.GEOPHYSICAL RESEARCH LETTERS,46(13),7752-7760. |
MLA | de Gouw, J. A.,et al."Hydrocarbon Removal in Power Plant Plumes Shows Nitrogen Oxide Dependence of Hydroxyl Radicals".GEOPHYSICAL RESEARCH LETTERS 46.13(2019):7752-7760. |
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