气候变化领域集成服务门户(CCPortal): Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol

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DOI	10.5194/acp-22-805-2022
	Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol
	Kim, Dongwook; Cho, Changmin; Jeong, Seokhan; Lee, Soojin; Nault, Benjamin A.; Campuzano-Jost, Pedro; Day, Douglas A.; Schroder, Jason C.; Jimenez, Jose L.; Volkamer, Rainer; Blake, Donald R.; Wisthaler, Armin; Fried, Alan; DiGangi, Joshua P.; Diskin, Glenn S.; Pusede, Sally E.; Hal, Samuel R.; Ullmann, Kirk; Huey, L. Gregory; Tanner, David J.; Dibb, Jack; Knote, Christoph J.; Min, Kyung-Eun
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	805
结束页码	821
卷号	22 期号:2 页码:17
英文摘要	Glyoxal (CHOCHO), the simplest dicarbonyl in the troposphere, is a potential precursor for secondary organic aerosol (SOA) and brown carbon (BrC) affecting air quality and climate. The airborne measurement of CHOCHO concentrations during the KORUS-AQ (KORea-US Air Quality study) campaign in 2016 enables detailed quantification of loss mechanisms pertaining to SOA formation in the real atmosphere. The production of this molecule was mainly from oxidation of aromatics (59 %) initiated by hydroxyl radical (OH). CHOCHO loss to aerosol was found to be the most important removal path (69 %) and contributed to roughly similar to 20 % (3.7 mu g sm(-3) ppmv(-1) h(-1), normalized with excess CO) of SOA growth in the first 6 h in Seoul Metropolitan Area. A reactive uptake coefficient (gamma) of similar to 0.008 best represents the loss of CHOCHO by surface uptake during the campaign. To our knowledge, we show the first field observation of aerosol surface-area-dependent (A(surf)) CHOCHO uptake, which diverges from the simple surface uptake assumption as A(surf) increases in ambient condition. Specifically, under the low (high) aerosol loading, the CHOCHO effective uptake rate coefficient, k(eff,uptake), linearly increases (levels off) with A(surf); thus, the irreversible surface uptake is a reasonable (unreasonable) approximation for simulating CHOCHO loss to aerosol. Dependence on photochemical impact and changes in the chemical and physical aerosol properties free water, as well as aerosol viscosity, are discussed as other possible factors influencing CHOCHO uptake rate. Our inferred Henry's law coefficient of CHOCHO, 7.0x10(8) M atm(-1), is similar to 2 orders of magnitude higher than those estimated from salting-in effects constrained by inorganic salts only consistent with laboratory findings that show similar high partitioning into water-soluble organics, which urges more understanding on CHOCHO solubility under real atmospheric conditions.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000747082600001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273162
作者单位	Gwangju Institute of Science & Technology (GIST); Gwangju Institute of Science & Technology (GIST); University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder; University of California System; University of California Irvine; University of Innsbruck; University of Oslo; University of Colorado System; University of Colorado Boulder; National Aeronautics & Space Administration (NASA); NASA Langley Research Center; University of Virginia; National Center Atmospheric Research (NCAR) - USA; University System of Georgia; Georgia Institute of Technology; University System Of New Hampshire; University of New Hampshire; University of Augsburg; Helmholtz Association; Research Center Julich; Korea Environment Institute (KEI); Aerodyne Research; Colorado Department of Public Health & Environment
推荐引用方式 GB/T 7714	Kim, Dongwook,Cho, Changmin,Jeong, Seokhan,et al. Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol[J],2022,22(2):17.
APA	Kim, Dongwook.,Cho, Changmin.,Jeong, Seokhan.,Lee, Soojin.,Nault, Benjamin A..,...&Min, Kyung-Eun.(2022).Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(2),17.
MLA	Kim, Dongwook,et al."Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.2(2022):17.