Rationale and definition:
This indicator measures total aerosols (e.g. urban haze, smoke particles, desert dust, sea salt) distributed within a column of air from the Earth’s surface to the top of the atmosphere.
This indicator can be reported with a high degree of spatial disaggregation (including cities and neighborhood level).
Comments and limitations:
To be reviewed.
Preliminary assessment of current data availability by Friends of the Chair:
Primary data source:
Potential lead agency or agencies:
An agency such as UNEP could be responsible for collecting internationally comparable data across all countries.