Ed Hawkins
85 years ago.
In April 1938, Guy Callendar published his seminal paper showing that Earth’s land areas had warmed over the previous 50 years.
He also suggested that man-made CO₂ emissions had caused around half of the observed warming.
85 years ago.
https://rmets.onlinelibrary.wiley.com/doi/abs/10.1002/qj.49706427503
Ed Hawkins
The theory that increasing greenhouse gas levels in the atmosphere would cause warming was developed earlier by Fourier, Foote, Tyndall, Arrhenius & others.
Their work enabled Callendar to join the pieces together and demonstrate a human-caused increase in both CO2 & global land temperatures and, importantly, link these together.
The work of Plass, Keeling, Revelle, Manabe & others would subsequently solidify these ideas.
Climate science has a long history we should use to communicate more.
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