Articles | Volume 20, issue 22
Atmos. Chem. Phys., 20, 14333–14346, 2020
https://doi.org/10.5194/acp-20-14333-2020
Atmos. Chem. Phys., 20, 14333–14346, 2020
https://doi.org/10.5194/acp-20-14333-2020
Research article
25 Nov 2020
Research article | 25 Nov 2020

Total column ozone in New Zealand and in the UK in the 1950s

Stefan Brönnimann and Sylvia Nichol

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Short summary
Historical column ozone data from New Zealand and the UK from the 1950s are digitised and re-evaluated. They allow studying the ozone layer prior to the era of ozone depletion. Day-to-day changes are addressed, which reflect the flow near the tropopause and hence may serve as a diagnostic for atmospheric circulation in a time and region of sparse radiosondes. A long-term comparison shows the amount of ozone depletion at southern mid-latitudes and indicates how far we are from full recovery.
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