GSTDTAP  > 地球科学
DOI10.5194/acp-17-343-2017
On the implications of aerosol liquid water and phase separation for organic aerosol mass
Pye, Havala O. T.1; Murphy, Benjamin N.1; Xu, Lu2; Ng, Nga L.2,3; Carlton, Annmarie G.4,12; Guo, Hongyu3; Weber, Rodney3; Vasilakos, Petros2; Appel, K. Wyat1; Budisulistiorini, Sri Hapsari5; Surratt, Jason D.5; Nenes, Athanasios2,3,6,7; Hu, Weiwei8,9; Jimenez, Jose L.8,9; Isaacman-VanWertz, Gabriel10; Misztal, Pawel K.10; Goldstein, Allen H.10,11
2017-01-06
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2017
卷号17期号:1
文章类型Article
语种英语
国家USA; Greece
英文摘要

Organic compounds and liquid water are major aerosol constituents in the southeast United States (SE US). Water associated with inorganic constituents (inorganic water) can contribute to the partitioning medium for organic aerosol when relative humidities or organic matter to organic carbon (OM / OC) ratios are high such that separation relative humidities (SRH) are below the ambient relative humidity (RH). As OM / OC ratios in the SE US are often between 1.8 and 2.2, organic aerosol experiences both mixing with inorganic water and separation from it. Regional chemical transport model simulations including inorganic water (but excluding water uptake by organic compounds) in the partitioning medium for secondary organic aerosol (SOA) when RH > SRH led to increased SOA concentrations, particularly at night. Water uptake to the organic phase resulted in even greater SOA concentrations as a result of a positive feedback in which water uptake increased SOA, which further increased aerosol water and organic aerosol. Aerosol properties, such as the OM / OC and hygroscopicity parameter (kappa(org)), were captured well by the model compared with measurements during the Southern Oxidant and Aerosol Study (SOAS) 2013. Organic nitrates from monoterpene oxidation were predicted to be the least water-soluble semivolatile species in the model, but most biogenically derived semivolatile species in the Community Multiscale Air Quality (CMAQ) model were highly water soluble and expected to contribute to water-soluble organic carbon (WSOC). Organic aerosol and SOA precursors were abundant at night, but additional improvements in daytime organic aerosol are needed to close the model-measurement gap. When taking into account deviations from ideality, including both inorganic (when RH > SRH) and organic water in the organic partitioning medium reduced the mean bias in SOA for routine monitoring networks and improved model performance compared to observations from SOAS. Property updates from this work will be released in CMAQ v5.2.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000393679100002
WOS关键词ISOPRENE-EPOXYDIOLS ; PARTICLE-PHASE ; PARTICULATE MATTER ; RELATIVE-HUMIDITY ; UNITED-STATES ; CHEMICAL-COMPOSITION ; REACTIVE UPTAKE ; ANTHROPOGENIC EMISSIONS ; HYGROSCOPIC BEHAVIOR ; THERMODYNAMIC MODEL
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
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/29506
专题地球科学
作者单位1.US EPA, Natl Exposure Res Lab, Res Triangle Pk, NC USA;
2.Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA;
3.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA;
4.Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ USA;
5.Univ North Carolina Chapel Hill, Gillings Sch Global Publ Hlth, Chapel Hill, NC USA;
6.Natl Observ Athens, Inst Environm Res & Sustainable Dev, Palea Penteli 15236, Greece;
7.Fdn Res & Technol Hellas, Inst Chem Engn Sci, Patras, Greece;
8.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA;
9.Univ Colorado, Dept Chem & Biochem, Campus Box 215, Boulder, CO 80309 USA;
10.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA;
11.Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA;
12.Univ Calif Irvine, Dept Chem, Irvine, CA 92717 USA
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Pye, Havala O. T.,Murphy, Benjamin N.,Xu, Lu,et al. On the implications of aerosol liquid water and phase separation for organic aerosol mass[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(1).
APA Pye, Havala O. T..,Murphy, Benjamin N..,Xu, Lu.,Ng, Nga L..,Carlton, Annmarie G..,...&Goldstein, Allen H..(2017).On the implications of aerosol liquid water and phase separation for organic aerosol mass.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(1).
MLA Pye, Havala O. T.,et al."On the implications of aerosol liquid water and phase separation for organic aerosol mass".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.1(2017).
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