How one man discovered man-made climate change at home in West Sussex | Register

A remarkable discovery about the Earth’s climate was made 84 years ago. Guy Callendar was a steam engineer, but he was fascinated with collecting weather observations and gathered temperature records from 147 weather stations around the world dating back to 1880. He did this alone in his spare time at home in West Sussex.

Despite being an amateur, Callendar calculated that the average world temperature had risen by about 0.3C in 30 years. It did not sound like much of an increase, but in the long history of the Earth’s climate it was significant. “This was an extraordinary achievement to assimilate all that data,” Joanna Haigh, a climate expert, said at a recent meeting of the Royal Meteorological Society.

Scientists in the 19th and early

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