Sydney Chapman (astronomer)

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Sydney Chapman (January 29, 1888June 16, 1970) was a British mathematician, astronomer and geophysicist. He was born in Manchester and educated at the Royal Technical Institute, Salford (now the University of Salford), and the universities of Manchester and Cambridge, where he read mathematics.

He held the Beyer Chair of Applied Mathematics at the Victoria University of Manchester from 1919 to 1924.

In his professional life he specialised in mathematics, astronomy and geophysics. He suffered from depression but was still productive, becoming a fellow of Queen's College, Oxford. He won the Gold Medal of the Royal Astronomical Society in 1949 and the Copley Medal in 1964. He is credited with working out, in 1930, the photochemical mechanisms that give rise to the ozone layer.

Instead of waiting to retire from his Oxford University post at 65, he resigned and began taking research and teaching placements all over the world, including the University of Alaska Fairbanks and Colorado, but as far afield as Istanbul, Cairo, Prague and Tokyo as well. He died in Boulder, Colorado.

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