Whose work first measured the Antarctic ozone hole?

In 1985, researchers Joe Farman, Brian Gardiner, and Jonathan Shanklin reported unexpectedly low springtime ozone levels over Antarctica. Their measurements showed a dramatic seasonal depletion that came to be known as the ozone hole. This discovery transformed public understanding of atmospheric chemistry and led to major international action, including the Montreal Protocol of 1987. It remains one of the clearest examples of successful global environmental policy.