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DOI10.5194/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
ISSN1680-7316
EISSN1680-7324
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
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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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