Trace gas measurements made with the TAO FTIR Spectrometer can be downloaded from the NDACC data archive. The figures below show total column gas measurements in molecules/cm2 from the TAO FTS for 2002-2020. See below for data from other instruments. 
  TAO Ozone, Nitric Acid, Hydrogen Chloride, Hydrogen Fluoride, Carbon Monoxide, Nitrous Oxide, Methane, Hydrogen Cyanide, Ethane total column time series 
  Brewer MKIV Spectrophotometer
Data from the TAO Brewer and other stations that are members of the World Ozone and Ultraviolet Radiation Centre can be found on the WOUDC website.
The TAO SAOZ alternates between Toronto and Eureka, Nunavut.  Data from the SAOZ at both of these locations can be found on the SAOZ website
See the TAO weather page for data from our weather station.
The Pandora data can be viewed at