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Estimating ground-level particulate matter concentrations using satellite-based data: a review

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journal contribution
posted on 2019-12-17, 07:31 authored by Minso Shin, Yoojin Kang, Seohui Park, Jungho Im, Cheolhee Yoo, Lindi J. Quackenbush

Particulate matter (PM) is a widely used indicator of air quality. Satellite-derived aerosol products such as aerosol optical depth (AOD) have been a useful source of data for ground-level PM monitoring. However, satellite-based approaches for PM monitoring have limitations such as impacts of cloud cover. Recently, many studies have documented advances in modeling for monitoring PM over the globe. This review examines recent papers on ground-level PM monitoring for the past 10 years focusing on modeling techniques, sensor types, and areas. Satellite-based retrievals of AOD and commonly used approaches for estimating PM concentrations are also briefly reviewed. Research trends and challenges are discussed based on the review of 130 papers. The limitations and challenges include spatiotemporal scale issues, missing values in satellite-based variables, sparse distribution of ground stations for calibration and validation, unbalanced distribution of PM concentrations, and difficulty in the operational use of satellite-based PM estimation models. The literature review suggests there is room for further investigating: 1) the spatial extension of PM monitoring to global scale; 2) the synergistic use of satellite-derived products and numerical model output to improve PM estimation accuracy, gap-filling, and operational monitoring; 3) the use of more advanced modeling techniques including data assimilations; 4) the improvement of emission data quality; and 5) short-term (hours to days) PM forecasts through combining satellite data and numerical forecast model results.

Funding

This study was supported by the National Institute of Environmental Research (NIER), Korea [NIER-2019-01-02-051], by the National Research Foundation of Korea [NRF-2017M1A3A3A02015981; NRF-2017M3D8A1092021], by the Korea Meteorological Administration [KMIPA 2017-7010], and by the Institute for Information & communications Technology Promotion (IITP) supported by the Ministry of Science and ICT (MSIT), Korea (IITP-2019-2018-0-01424). CY was also supported by Global PhD Fellowship Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education [NRF-2018H1A2A1062207].

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