TOAR-II HEGIFTOM Focus Working Group
FTIR
The details of the homogenized FTIR sites can be found here.
Global map of 25 FTIR sites (22 active in ozone) providing ozone data (see NDACC Infrared WG: https://www2.acom.ucar.edu/irwg).
Monthly means of tropospheric ozone column (ground - 150hPa) data in DU for the FTIR sites.