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A Satellite–Based High-Resolution (1-km) Ambient $PM_{2.5}$ Database for India over Two Decades (2000–2019): Applications for Air Quality Management
| Content Provider | MDPI |
|---|---|
| Author | Dey, Sagnik Purohit, Bhavesh Balyan, Palak Dixit, Kuldeep Bali, Kunal Kumar, Alok Imam, Fahad Chowdhury, Sourangsu Ganguly, Dilip Gargava, Prashant Shukla, V. |
| Copyright Year | 2020 |
| Description | Fine particulate matter (PM2.5) is a major criteria pollutant affecting the environment, health and climate. In India where ground-based measurements of PM2.5 is scarce, it is important to have a long-term database at a high spatial resolution for an efficient air quality management plan. Here we develop and present a high-resolution (1-km) ambient PM2.5 database spanning two decades (2000–2019) for India. We convert aerosol optical depth from Moderate Resolution Imaging Spectroradiometer (MODIS) retrieved by Multiangle Implementation of Atmospheric Correction (MAIAC) algorithm to surface PM2.5 using a dynamic scaling factor from Modern-Era Retrospective analysis for Research and Applications Version 2 (MERRA-2) data. The satellite-derived daily (24-h average) and annual PM2.5 show a R2 of 0.8 and 0.97 and root mean square error of 25.7 and 7.2 μg/m3, respectively against surface measurements from the Central Pollution Control Board India network. Population-weighted 20-year averaged PM2.5 over India is 57.3 μg/m3 (5–95 percentile ranges: 16.8–86.9) with a larger increase observed in the present decade (2010–2019) than in the previous decade (2000 to 2009). Poor air quality across the urban–rural transact suggests that this is a regional scale problem, a fact that is often neglected. The database is freely disseminated through a web portal ‘satellite-based application for air quality monitoring and management at a national scale’ (SAANS) for air quality management, epidemiological research and mass awareness. |
| Starting Page | 3872 |
| e-ISSN | 20724292 |
| DOI | 10.3390/rs12233872 |
| Journal | Remote Sensing |
| Issue Number | 23 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-11-26 |
| Access Restriction | Open |
| Subject Keyword | Remote Sensing Imaging Science Pm2.5 Maiac Aod India Air Quality |
| Content Type | Text |
| Resource Type | Article |
