Column Ozone is an inference of the total ozone in a vertical atmospheric column above the measurement site. The ozone values are inferred from UV-MFRSR measurements using a double wavelength pair technique that separates out the Rayleigh and aerosol optical depth from the total optical depth leaving the ozone optical depth as the only significant component. The ozone optical depth is expressed in Dobson units. For a more complete presentation see Gao et al. (2001).


Graphs of the data are available for a time selection of a month or less. The graphs will be displayed along with a tabular view of the data used to create the graph. We also provide a feature to export the data to a file on your local computer in a comma delimited(CSV) format.


For any time duration greater than a year, use the end date option below. This will generate a data file that you can download to your local computer.