Spatial variability of AERONET aerosol optical properties and satellite data in South Korea during NASA DRAGON-Asia campaign

We investigated spatial variability in aerosol optical properties, including aerosol optical depth (AOD), fine-mode fraction (FMF), and single scattering albedo (SSA), observed at 21 Aerosol Robotic Network (AERONET) sites and satellite remote sensing data in South Korea during the spring of 2012. T...

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Bibliographic Details
Published in:Environmental Science & Technology
Main Authors: LEE, HYUNG JOO, Son, Youn-Suk
Format: Article in Journal/Newspaper
Language:English
Published: American Chemical Society 2016
Subjects:
SOURCE APPORTIONMENT
SEOUL
DUST
RETRIEVAL
PARTICLES
ALGORITHM
EMISSIONS
TRENDS
PM2.5
PM10
Aerosol Robotic Network
Online Access:https://oasis.postech.ac.kr/handle/2014.oak/109343
https://doi.org/10.1021/acs.est.5b04831
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Summary:We investigated spatial variability in aerosol optical properties, including aerosol optical depth (AOD), fine-mode fraction (FMF), and single scattering albedo (SSA), observed at 21 Aerosol Robotic Network (AERONET) sites and satellite remote sensing data in South Korea during the spring of 2012. These dense AERONET networks established in a National Aeronautics and Space Administration (NASA) field campaign enabled us to examine the spatially detailed aerosol size distribution and composition as well as aerosol levels. The springtime particle air quality was characterized by high background aerosol levels and high contributions of coarse-mode aerosols to total aerosols. We found that between-site correlations and coefficient of divergence for AOD and FMF strongly relied on the distance between sites, particularly in the south north direction. Higher AOD was related to higher population density and lower distance from highways, and the aerosol size distribution and composition reflected source-specific characteristics. The ratios of satellite NO2 to AOD, which indicate the relative contributions of local combustion sources to aerosol levels, represented higher local contributions in metropolitan Seoul and Pusan. Our study demonstrates that the aerosol levels were determined by both local and regional pollution and that the relative contributions of these pollutions to aerosols generated spatial heterogeneity in the particle air quality. 1 1 N scie scopus

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