Timeline Thursday 16 May 1985

Events on Thursday 16 May 1985 4

• 1902 – 1985 Margaret Hamilton (1902-1985) American actress and former kindergarten teacher, forever the Wicked Witch of the West in The Wizard of Oz.
• 1985 Antarctic ozone hole discovered British scientists reveal a seasonal collapse in stratospheric ozone Scientists with the British Antarctic Survey published findings on 16 May 1985 documenting a dramatic seasonal thinning of ozone over Antarctica. The discovery galvanized international action on ozone-depleting chemicals and fed directly into the 1987 Montreal Protocol. It remains a landmark case of environmental science driving global policy.
• 1985 Margaret Hamilton dies in Salisbury Margaret Hamilton dies aged 82.
• 1985 The Antarctic ozone hole Worse than the models Joe Farman and colleagues at the British Antarctic Survey report a springtime collapse in ozone over Halley Bay so severe that satellite software had been discarding the readings as instrument error. The hole is far larger than anyone had predicted. Public opinion turns almost immediately.