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DOI | 10.5194/acp-17-2297-2017 |
Constraining uncertainties in particle-wall deposition correction during SOA formation in chamber experiments | |
Nah, Theodora1; McVay, Renee C.2; Pierce, Jeffrey R.3; Seinfeld, John H.2,4; Ng, Nga L.1,5 | |
2017-02-14 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The effect of vapor-wall deposition on secondary organic aerosol (SOA) formation has gained significant attention; however, uncertainties in experimentally derived SOA mass yields due to uncertainties in particle-wall deposition remain. Different approaches have been used to correct for particle-wall deposition in SOA formation studies, each having its own set of assumptions in determining the particle-wall loss rate. In volatile and intermediate-volatility organic compound (VOC and IVOC) systems in which SOA formation is governed by kinetically limited growth, the effect of vapor-wall deposition on SOA mass yields can be constrained by using high surface area concentrations of seed aerosol to promote the condensation of SOA-forming vapors onto seed aerosol instead of the chamber walls. However, under such high seed aerosol levels, the presence of significant coagulation may complicate the particle-wall deposition correction. Here, we present a model framework that accounts for coagulation in chamber studies in which high seed aerosol surface area concentrations are used. For the alpha-pinene ozonolysis system, we find that after accounting for coagulation, SOA mass yields remain approximately constant when high seed aerosol surface area concentrations (>= 8000 mu m(2) cm(-3)) are used, consistent with our prior study (Nah et al., 2016) showing that alpha-pinene ozonolysis SOA formation is governed by quasi-equilibrium growth. In addition, we systematically assess the uncertainties in the calculated SOA mass concentrations and yields between four different particle-wall loss correction methods over the series of alpha-pinene ozonolysis experiments. At low seed aerosol sur-face area concentrations (< 3000 mu m(2) cm(-3)), the SOA mass yields at peak SOA growth obtained from the particle-wall loss correction methods agree within 14 %. However, at high seed aerosol surface area concentrations (>= 8000 mu m(2) cm(-3)), the SOA mass yields at peak SOA growth obtained from different particle-wall loss correction methods can differ by as much as 58 %. These differences arise from assumptions made in the particle-wall loss correction regarding the first-order particle-wall loss rate. This study highlights the importance of accounting for particle-wall deposition accurately during SOA formation chamber experiments and assessing the uncertainties associated with the application of the particle-wall deposition correction method when comparing and using SOA mass yields measured in different studies. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395118000005 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; ALPHA-PINENE OZONOLYSIS ; LABORATORY CHAMBERS ; SMOG-CHAMBER ; VAPOR ; GAS ; OXIDATION ; LOSSES ; YIELDS ; PHASE |
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/16225 |
专题 | 地球科学 |
作者单位 | 1.Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA; 2.CALTECH, Div Chem & Chem Engn, Pasadena, CA USA; 3.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO USA; 4.CALTECH, Div Engn & Appl Sci, Pasadena, CA USA; 5.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA USA |
推荐引用方式 GB/T 7714 | Nah, Theodora,McVay, Renee C.,Pierce, Jeffrey R.,et al. Constraining uncertainties in particle-wall deposition correction during SOA formation in chamber experiments[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(3). |
APA | Nah, Theodora,McVay, Renee C.,Pierce, Jeffrey R.,Seinfeld, John H.,&Ng, Nga L..(2017).Constraining uncertainties in particle-wall deposition correction during SOA formation in chamber experiments.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(3). |
MLA | Nah, Theodora,et al."Constraining uncertainties in particle-wall deposition correction during SOA formation in chamber experiments".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.3(2017). |
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