Estimation of Source-Based Aerosol Optical Properties for Polydisperse Aerosols from Receptor Models

• Published in: Applied sciences Vol. 9; no. 7; p. 1443
• Main Authors: Jung, Chang Hoon, Lee, Ji Yi, Um, Junshik, Lee, Seoung Soo, Yoon, Young Jun, Kim, Yong Pyo
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.04.2019
• Subjects: Aerosols; Air pollution; Apportionment; Atmospheric aerosols; Carbon; Dependent variables; Efficiency; Endangered & extinct species; Extinction; Factor analysis; Linear programming; Mass balance; mass extinction efficiency; Mass extinctions; Mie scattering; Optical properties; Organic chemistry; Outdoor air quality; Particle size; polydispersity; size- and source-resolved aerosol optical properties; SMP receptor model; Studies; New York; United States > US
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app9071443

We estimated source-based aerosol optical properties for polydisperse aerosols according to a chemical-species-resolved mass contribution method based on source apportionment. We investigated the sensitivity of aerosol optical properties based on PM2.5 (particulate matter that have a diameter of less than 2.5 micrometers) monitoring results. These aerosols were composed of ions, metals, elemental carbon, and water-soluble organic carbon which includes humic-like carbon substances and water-soluble organic carbon. We calculated aerosols’ extinction coefficients based on the PM2.5 composition data and the results of a multivariate receptor model (Solver for Mixture Problem model, SMP). Based on the mass concentration of chemical composition and nine sources calculated with the SMP receptor model, we estimated the size-resolved mass extinction efficiencies for each aerosol source using a multilinear regression model. Consequently, this study quantitatively determined the size resolved sources contributing to the apportionment-based aerosol optical properties and calculated their respective contributions. The results show that source-resolved mass concentrations and extinction coefficients had varying contributions. This discrepancy between the source-based mass concentration and extinction coefficient was mainly due to differences between the source-dependent aerosol size distribution and the aerosol optical properties from different sources.