Combined ground-based total ozone data at three Norwegian sites (2000 to 2020)

Combined total column ozone (TCO) at three Norwegian sites (Oslo, Andøya, Ny-Ålesund), using three measurement techniques (Brewer (DS and GI), SAOZ, GUV). The daily means are composed of noon-averages (+-2h around local noon) for Brewer (DS and GI) and GUV, and of sunrise- and sunset averages for SAOZ. In Oslo and Andøya, Brewer DS measurements build the baseline, and missing measurement days are then filled with Brewer GI data and then with GUV. In Ny-Ålesund, SAOZ measurements build the baseline, and missing measurement days are filled with Brewer DS data (starting in 2013) and GUV. This dataset has been used in Bernet et al. (2022). The initial data of each of the instruments are available at: Brewer DS (daily means): https://woudc.org Brewer GI: https://doi.org/10.5281/zenodo.6760244 SAOZ: www.ndacc.org GUV: https://doi.org/10.5281/zenodo.4773478 Responsible institute: NILU - Norwegian Institute for Air Research Bernet, L., Svendby, T., Hansen, G., Orsolini, Y., Dahlback, A., Goutail, F., Pazmiño, A., Petkov, B., and Kylling, A., Total ozone trends at three northern high-latitude stations, 2022.