globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025156
论文题名:
Enhanced formation of isoprene-derived organic aerosol in sulfur-rich power plant plumes during Southeast Nexus
作者: Xu L.; Middlebrook A.M.; Liao J.; de Gouw J.A.; Guo H.; Weber R.J.; Nenes A.; Lopez-Hilfiker F.D.; Lee B.H.; Thornton J.A.; Brock C.A.; Neuman J.A.; Nowak J.B.; Pollack I.B.; Welti A.; Graus M.; Warneke C.; Ng N.L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:18
起始页码: 11137
结束页码: 11153
语种: 英语
英文关键词: heterogeneous reaction ; isoprene ; isoprene epoxydiols (IEPOX) ; organic aerosol ; Southeast Nexus (SENEX) study ; sulfate
英文摘要: We investigate the effects of anthropogenic sulfate on secondary organic aerosol (SOA) formation from biogenic isoprene through airborne measurements in the southeastern United States as part of the Southeast Nexus (SENEX) field campaign. In a flight over Georgia, organic aerosol (OA) is enhanced downwind of the Harllee Branch power plant but not the Scherer power plant. We find that the OA enhancement is likely caused by the rapid reactive uptake of isoprene epoxydiols (IEPOX) in the sulfate-rich plume of Harllee Branch, which was emitting at least 3 times more sulfur dioxide (SO2) than Scherer, and more aerosol sulfate was produced downwind. The contrast in the evolution of isoprene-derived OA concentration between two power plants with different SO2 emissions provides an opportunity to investigate the magnitude and mechanisms of particle sulfate on isoprene-derived OA formation. We estimate that 1 µg sm−3 reduction of sulfate would decrease the isoprene-derived OA by 0.23 ± 0.08 µg sm−3. Based on a parameterization of the IEPOX heterogeneous reactions, we find that the effects of sulfate on isoprene-derived OA formation in the power plant plume arises from enhanced particle surface area and particle acidity, which increases both IEPOX uptake to particles and subsequent aqueous-phase reactions, respectively. The observed relationships between isoprene-OA, sulfate, particle pH, and particle water in previous field studies are explained using these findings. ©2016. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62816
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 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, Boulder, CO, United States; Now at Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Now at Universities Space Research Association, Columbia, MD, United States; Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research, Patras, Greece; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palea Penteli, Greece; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Now at Aerodyne Research Inc., Billerica, MA, United States; Now at Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Now at Department of Physics, Leibniz Institute for Tropospheric Research, Leipzig, Germany; Now at Institute of Meteorology and Geophysics, University of Innsbruck, Innsbruck, Austria

Recommended Citation:
Xu L.,Middlebrook A.M.,Liao J.,et al. Enhanced formation of isoprene-derived organic aerosol in sulfur-rich power plant plumes during Southeast Nexus[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(18)
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