Sixty seven years ago, on this day, June 17th, 1957, Guy Callendar submitted an article – “On the Amount of Carbon Dioxide in the Atmosphere” to Tellus, the Swedish scientific journal.
The amount of carbon dioxide in the air was roughly 314ppm. As of 2024 it is 426ppm, but check here for daily measures.
The context was that Guy Callendar had now been writing about the amount of CO2 in the atmosphere and the warming planet for 20 years. He had presented this work in 1938 at the British Meteorological Society and received a polite but relatively dismissive hearing. Callendar must have been looking at the work around the IGY and hopefully, he was feeling at least a small sense of vindication. I don’t know, even though he’s been largely ignored by or tolerated by the British scientific establishment.
What we learn is that the old Hollywood trope of the lone genius, who’s right when the establishment is wrong or looking the other way, is not entirely without foundation.
What happened next Callendar had one more significant paper in him in 61/62. I think he must have been too sick to be invited to the Conservation Foundation meeting in 63. And he died in 1964 on the same day of the year, Svante Arrhenius had died, in 1927.
What do you think? Does this pass the ‘so what?’ threshold? Have I got facts wrong? Interpretation wrong? Please do comment on this post, unless you are a denialist, obvs.
Also on this day:
Carbon Capture? Far from ready… June 17, 2008
June 17, 2009 – Blistering speech about how “The Climate Nightmare is Upon Us” by Christine Milne