A high-resolution index suitable for multi-pollutant monitoring in urban areas

Haixia Feng; Jian Li; Haiying Feng; Erwei Ning; Qi Wang

doi:10.1016/j.scitotenv.2021.145428

A high-resolution index suitable for multi-pollutant monitoring in urban areas

Sci Total Environ. 2021 Jun 10:772:145428. doi: 10.1016/j.scitotenv.2021.145428. Epub 2021 Jan 28.

Authors

Haixia Feng¹, Jian Li², Haiying Feng³, Erwei Ning², Qi Wang²

Affiliations

¹ School of Transportation and Logistics Engineering, Shandong Jiaotong University, Jinan 250357, China. Electronic address: fhx76@163.com.
² School of Transportation and Logistics Engineering, Shandong Jiaotong University, Jinan 250357, China.
³ Beijing Technology and Business University, Beijing 100101, China.

PMID: 33581518
DOI: 10.1016/j.scitotenv.2021.145428

Abstract

In view of the problems involved in remote sensing monitoring of urban air quality, including low spatial resolution, only for a single pollutant, complex inversion algorithms, and difficultly obtaining parameter values, in this study, a new difference smog index (DSI) was developed, and then a comparison with the normal difference haze index, the difference index, and the MODIS aerosol optical depth products. The results show that the DSI model developed in this study has a higher accuracy and a better monitoring effect in urban areas, and it has a higher resolution (30 m), which greatly improves the degree of refinement of the remote sensing monitoring. The DSI model has a higher extensibility, and it is suitable for monitoring the AQI, PM_2.5, NO₂. The DSI model proposed in this paper is simple and easy to use, and thus, it has a high potential for application and deserves promotion in urban air quality monitoring.

Keywords: DSI; Moderate-high resolution; Remote sensing monitoring; Urban air quality.