This layer shows the annual mean concentration of fine particulate matter (PM2.5) over the area of interest, expressed in micrograms per cubic metre. It is derived from the Resource Watch dataset cit_031_rw1_air_quality_PM25_concentration on Google Earth Engine, which combines satellite observations, chemical transport models and ground measurements at roughly 10 km resolution. Colours run from green (clean) through yellow to red (polluted); the WHO annual guideline is 5 μg/m³, and European sites typically range from 5 to 25 μg/m³, with higher values in the Po Valley.
The layer represents the annual mean ground-level concentration of fine particulate matter (PM2.5) over the area of interest, in μg/m³. Values are read from a global gridded product that fuses satellite-retrieved aerosol optical depth, chemical transport model output and ground-station measurements.
| Code | Provider | Resolution | Year |
|---|---|---|---|
| cit_031_rw1_air_quality_PM25_concentration | Resource Watch (Google Earth Engine) | ~10 km | 2018 |
The most recent image of the Resource Watch PM2.5 ImageCollection is selected, clipped to the polygon and reprojected to Web Mercator, then rendered on a green-to-red continuous colormap (0 to 50 μg/m³). Per-geometry statistics (minimum, maximum and mean PM2.5) are computed over the valid, in-polygon pixels. The WHO annual air quality guideline is 5 μg/m³.