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FIG. 69. (a) Total ozone (black curve) and temperature (red curve) data from 68 ozonesondes flown at the South Pole in 1999 and (b-d) representative ozonesonde profiles from (b) the pre-ozone hole period on 28 July, (c) the ozone hole period on 29 September, and (d) the post-ozone hole period on 23 December. (Analysis provided by CMDL.)