Tracking Urban Atmospheric Pollutants using Sentinel-5P Satellite Data
Urban nitrogen dioxide ($NO_2$) is a key indicator of combustion-related air pollution and exhibits strong spatial and temporal variability in cities. This study presents a satellite-based framework for tracking urban $NO_2$ pollution using tropospheric column observations from Sentinel-5P/TROPOMI over Guayas Province, Ecuador. Rather than estimating surface concentrations, the methodology emphasizes robust distributional metrics, including the median and upper-tail percentiles ($P_{90}$, $P_{95}$, and $P_{99}$), to characterize background conditions and localized pollution extremes at the canton scale. Multi-year satellite observations are aggregated annually and analyzed using unsupervi...
| Authors | Alice Gomez-Cantos, Henry O. Velesaca |
|---|---|
| Primary category | stat.AP |
| Published | 21 May 2026 |
| Last updated at source | 21 May 2026 |
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