Estimating PM 1 concentrations from MODIS over Yangtze River Delta of China during 2014-2017

Qin, K, Zou, J, Guo, J, Lu, M, Bilal, M, Zhang, K, Ma, F and Zhang, Y 2018, 'Estimating PM 1 concentrations from MODIS over Yangtze River Delta of China during 2014-2017', Atmospheric Environment, vol. 195, pp. 149-158.


Document type: Journal Article
Collection: Journal Articles

Title Estimating PM 1 concentrations from MODIS over Yangtze River Delta of China during 2014-2017
Author(s) Qin, K
Zou, J
Guo, J
Lu, M
Bilal, M
Zhang, K
Ma, F
Zhang, Y
Year 2018
Journal name Atmospheric Environment
Volume number 195
Start page 149
End page 158
Total pages 10
Publisher Elsevier
Abstract Compared to the space-borne estimation of PM2.5 (particulate matter with aerodynamic diameter ≤2.5 μm), the investigation of PM1 (≤1 μm) remains less intensive and thus unclear. Here we estimated four years (20142017) of ground-level PM1 concentrations from MODIS aerosol optical depth (AOD) in attempt to gain a better understanding of much finer particles. The Yangtze River Delta (YRD) region, with a relatively dense ground-based PM1 station network, was selected as the study area. The geographically and temporally weighted regression (GTWR) model simultaneously accounting for spatial and temporal variability existing within various predictors was constructed. Validation of satellite-estimated PM1 against ground-measured PM1 yields a high consistence, significant improvement over previous work (R2 = 0.74 VS 0.59, RMSE = 13.02 μg/m3 VS 22.5 μg/m3). This suggests the PM1 estimates from GTWR model are reliable and robust enough to obtain large-scale fine particle contents. The population exposure of air pollution in the YRD region, therefore, has been analyzed by calculating population-weighted mean PM1 concentrations, which reaches as high as 37.22 μg/m3. Further analysis indicates that near half the people live in locations with high-level PM1 concentration (>35 μg/m3), which has profounding implication for improving our understanding of human exposure to fine aerosol particles.
Subject Atmospheric Aerosols
Geodesy
Keyword(s) Aerosol optical depth
China
PM 1
Satellite
Yangtze river delta
DOI - identifier 10.1016/j.atmosenv.2018.09.054
Copyright notice © 2018 Elsevier Ltd. All rights reserved.
ISSN 1352-2310
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