Version 3.5.2 of the BS Filled Total Column Ozone (TCO) database provides a correction to version 3.5.1 of the same database – for reasons that we won’t go into, from 1984 to 1992, the filling over the polar cap was absent on around 1 day in 7. Version 3.5.2 and 3.5.1 of the filled database are otherwise identical. Please refer to version 3.5.1 (https://doi.org/10.5281/zenodo.4535247) for details on the creation of the database. Please note: For the reasons detailed in this document, versions 3.5.x of the BS Filled TCO database and of the NIWA-BS TCO database should not be used henceforth for trend analysis and, as such, we have updated the version 3.4 of NIWA-BS Combined TCO database to the end of 2019 (now referred to as version 3.4.1 of the database) as a replacement. You will find a link to version 3.4.1 under the link provided above. Please email greg@bodekerscientific.com and let us know which data set you downloaded and what your intended purpose for the use of the data is. You will then receive updates if an improved version becomes available.

{"references": ["Bodeker, G. E., Nitzbon, J., Tradowsky, J. S., Kremser, S., Schwertheim, A., and Lewis, J.: A global total column ozone climate data record, Earth Syst. Sci. Data, 13, 3885\u20133906, https://doi.org/10.5194/essd-13-3885-2021, 2021."]}