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Mass Extinction Efficiency Approximation for Polydispersed Aerosol Using Harmonic Mean-Type Approximation

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dc.contributor.authorUm, Junshik-
dc.contributor.authorJang, Seonghyeon-
dc.contributor.authorYoon, Young Jun-
dc.contributor.authorLee, Seoung Soo-
dc.contributor.authorLee, Ji Yi-
dc.contributor.authorHan, Kyung Man-
dc.contributor.authorChoi, Won Jun-
dc.contributor.authorKim, Yong Pyo-
dc.contributor.authorKim, Cheol-Hee-
dc.contributor.authorJung, Chang Hoon-
dc.date.accessioned2021-05-03T07:57:20Z-
dc.date.available2021-05-03T07:57:20Z-
dc.date.issued2020-12-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/11807-
dc.description.abstractAmong many parameters characterizing atmospheric aerosols, aerosol mass extinction efficiency (MEE) is important for understanding the optical properties of aerosols. MEE is expressed as a function of the refractive indices (i.e., composition) and size distributions of aerosol particles. Aerosol MEE is often considered as a size?independent constant that depends only on the chemical composition of aerosol particles. Famous Malm’s reconstruction equation and subsequent revised methods express the extinction coefficient as a function of aerosol mass concentration and MEE. However, the used constant MEE does not take into account the effect of the size distribution of polydispersed chemical composition. Thus, a simplified expression of size?dependent MEE is required for accurate and conventional calculations of the aerosol extinction coefficient and also other optical properties. In this study, a simple parameterization of MEE of polydispersed aerosol particles was developed. The geometric volume?mean diameters of up to 10 μm with lognormal size distributions and varying geometric standard deviations were used to represent the sizes of various aerosol particles (i.e., ammonium sulfate and nitrate, elemental carbon, and sea salt). Integrating representations of separate small mode and large mode particles using a harmonic mean type approximation generated the flexible and convenient parameterizations of MEE that can be readily used to process in-situ observations and adopted in large scale numerical models. The calculated MEE and the simple forcing efficiency using the method developed in this study showed high correlations with those calculated using the Mie?theory without losing accuracy.en_US
dc.languageEnglishen_US
dc.language.isoen_USen_US
dc.subjectChemistryen_US
dc.subjectEngineeringen_US
dc.subjectMaterials Scienceen_US
dc.subjectPhysicsen_US
dc.subject.classification기타()en_US
dc.titleMass Extinction Efficiency Approximation for Polydispersed Aerosol Using Harmonic Mean-Type Approximationen_US
dc.title.alternative에어로졸의 다분산 질량소멸 효율 근사en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationUm, Junshik, et al. 2020. "Mass Extinction Efficiency Approximation for Polydispersed Aerosol Using Harmonic Mean-Type Approximation". <em>APPLIED SCIENCES-BASEL</em>, 10(23): 8637-8651.en_US
dc.citation.titleAPPLIED SCIENCES-BASELen_US
dc.citation.volume10en_US
dc.citation.number23en_US
dc.identifier.doi10.3390/app10238637-
dc.citation.startPage8637en_US
dc.citation.endPage8651en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2018:45.27en_US
dc.subject.keywordmass extinction efficiencyen_US
dc.subject.keywordextinction coefficienten_US
dc.subject.keywordpolydispersed aerosolen_US
dc.subject.keywordreconstruction methoden_US
dc.subject.keywordMie scatteringen_US
dc.subject.keywordharmonic mean type approximationen_US
dc.identifier.localId2020-0226-
dc.identifier.scopusid2-s2.0-85097028414-
dc.identifier.wosid000597123200001-
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