Analysing PM2.5 concentrations using MODIS and monitoring measurements for Shanghai area
| Autor: | Yanhui Ren, Yi Wen, Lizhi Miao |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Physics: Conference Series. 1732:012104 |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/1732/1/012104 |
| Popis: | Analyzing PM2.5 concentrations from remote sensing images and surface measurements using the model of aerosol optical depth (AOD) is a popular method to evaluate the exposure to PM2.5 in some geographic regions. For analyzing the ground-level PM2.5 density on a daily basis using satellite-derived AOD in Shanghai area, we use Aqua MODIS (Moderate Resolution Imaging Spectroradiometer) to obtain the AOD values at 3-km resolution by dark pixel. However, AOD values are missing in many regions caused by processing method and imaging process. Interpolating the AOD values to extend the coverage area of MODIS and integrating the surface measurements, we filter the AOD values and PM2.5 measurements. The analysis results indicate that the correlation coefficient is 0.54 in Shanghai area. Satellite derived mean PM2.5 for Shanghai was 42.69 ug/m3 during the study period (Jan 2016 to Dec. 2018), whereas mean PM2.5 is highest in winter period (61.68 ug/m3), and lowest in autumn period (31.4 ug/m3) over study period in study area. |
| Databáze: | OpenAIRE |
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