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Estimation of the $PM_{2.5}$ and $PM_{10}$ Mass Concentration over Land from FY-4A Aerosol Optical Depth Data
| Content Provider | MDPI |
|---|---|
| Author | Sun, Yuxin Xue, Yong Jiang, Xingxing Jin, Chunlin Wu, Shuhui Zhou, Xiran |
| Copyright Year | 2021 |
| Description | The purpose of this study is to estimate the particulate matter $(PM_{2.5}$ and $PM_{10}$) in China using the improved geographically and temporally weighted regression (IGTWR) model and Fengyun (FY-4A) aerosol optical depth (AOD) data. Based on the IGTWR model, the boundary layer height (BLH), relative humidity (RH), AOD, time, space, and normalized difference vegetation index (NDVI) data are employed to estimate the $PM_{2.5}$ and $PM_{10}$. The main processes of this study are as follows: firstly, the feasibility of the AOD data from FY-4A in estimating $PM_{2.5}$ and $PM_{10}$ mass concentrations were analysed and confirmed by randomly selecting 5–6 and 9–10 June 2020 as an example. Secondly, hourly concentrations of $PM_{2.5}$ and $PM_{10}$ are estimated between 00:00 and 09:00 (UTC) each day. Specifically, the model estimates that the correlation coefficient $R^{2}$ of $PM_{2.5}$ is 0.909 and the root mean squared error (RMSE) is 5.802 $μg/m^{3}$, while the estimated $R^{2}$ of $PM_{10}$ is 0.915, and the RMSE is 12.939 $μg/m^{3}$. Our high temporal resolution results reveal the spatial and temporal characteristics of hourly $PM_{2.5}$ and $PM_{10}$ concentrations on the day. The results indicate that the use of data from the FY-4A satellite and an improved time–geographically weighted regression model for estimating $PM_{2.5}$ and $PM_{10}$ is feasible, and replacing land use classification data with NDVI facilitates model improvement. |
| Starting Page | 4276 |
| e-ISSN | 20724292 |
| DOI | 10.3390/rs13214276 |
| Journal | Remote Sensing |
| Issue Number | 21 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-10-24 |
| Access Restriction | Open |
| Subject Keyword | Remote Sensing Imaging Science Pm2.5 Pm10 Aod Fy-4a Igtwr |
| Content Type | Text |
| Resource Type | Article |
