[MCN] 1938, 1972 : What some had foreseen about CO2

[Lance Olsen]

"In 1938, engineer and amateur meteorologist Guy Stewart Callendar <https://en.wikipedia.org/wiki/Guy_Stewart_Callendar> compared datasets of atmospheric CO
2 from Kew in 1898-1901, which averaged 274 parts per million by volume (ppmv <https://en.wikipedia.org/wiki/Parts-per_notation>)[4] <https://en.wikipedia.org/wiki/Keeling_Curve#cite_note-4>, and from the eastern United States <https://en.wikipedia.org/wiki/United_States> in 1936-1938, which averaged 310 ppmv <https://en.wikipedia.org/wiki/Parts-per_notation>, and concluded that CO
2 concentrations were rising due to anthropogenic emissions[5] <https://en.wikipedia.org/wiki/Keeling_Curve#cite_note-5>. 

However, Callendar <https://en.wikipedia.org/wiki/Guy_Stewart_Callendar>'s findings were not widely accepted by the scientific community due to the patchy nature of the measurements.[6] <https://en.wikipedia.org/wiki/Keeling_Curve#cite_note-Fleming-6>[7] <https://en.wikipedia.org/wiki/Keeling_Curve#cite_note-7>”

https://en.wikipedia.org/wiki/Keeling_Curve <https://en.wikipedia.org/wiki/Keeling_Curve>

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"In 1972, pursuing his calculations of ice-cover feedbacks, Budyko declared that, at the rate we were pumping CO2 into the atmosphere, the ice covering the Arctic Ocean might melt entirely by 2050." 

"Most scientists spoke more cautiously.”

Spencer Weart. The Discovery of Rapid Climate Change. 
Physics Today, American Institute of Physics
https://physicstoday.scitation.org/doi/10.1063/1.1611350



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