The TOAR database collects hourly data of long-term surface air quality measurements from over 10,000 stations globally. Harmonized access to these data is provided via the JOIN web interface. 

The TOAR database collects hourly data of long-term surface air quality measurements from over 10,000 stations globally. Harmonized access to these data is provided via the JOIN web interface. 

TOAR Geo-location services

[Under construction] This web service samples various geospatial datasets to obtain metadata for the characterisation of specific measurement sites.

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The TOAR database of surface observations is the biggest collection of tropospheric ozone data in the world.

50
Users
10 K
Time-series
1 K
Stations
1 B
Data records