ozone hole

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ozone hole (plural ozone holes)

  1. A region of the stratosphere over Antarctica (and a smaller one over the Arctic) that is depleted of ozone in the local spring.
    • 1986, "Air chemists braced for battle over ozone hole," New Scientist, 6 Nov., p. 22 (retrieved 19 July 2010):
      Callis says that the ozone hole now developing over the Antarctic is as deep as last year's hole, but seems to cover a smaller area.