Carbon dioxide concentration was at 500+ ppm already in 1860

This has been around for some time, but I have only just come across it.

It could be that GS Callendar’s 1957 paper about Global warming  cherry picked supportive data points and ignored inconvenient data.

Reblogged from JunkScience

Did one of the fathers of manmade global warming cherry-pick his data for a 1957 study?

Here’s the original data.

Source: Slocum, G., Has the amount of carbon dioxide in the atmosphere changed significantly since the beginning of the twentieth century? Month. Weather Rev., 1955(October): p. 225-231.

Source: Slocum, G., Has the amount of carbon dioxide in the atmosphere changed significantly since the beginning of the twentieth century? Month. Weather Rev., 1955(October): p. 225-231. 

Here’s the cherry-picked version.

Callendar graph

Read the full story at Tallbloke’s blog.

Related:

slocum 1955 carbon dioxide Slocum, G., Has the amount of carbon dioxide in the atmosphere changed significantly since the beginning of the twentieth century? Month. Weather Rev., 1955(October): p. 225-231. 

Climate Change: Incorrect information on pre-industrial CO2

CO2: The Greatest Scientific Scandal of Our Time

 

 

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One Response to “Carbon dioxide concentration was at 500+ ppm already in 1860”

  1. grumpydenier Says:

    I also cover the background here, if I may post this as well.

    http://grumpydenier.wordpress.com/resources/more-about-co2/more-about-co2-page-iii/

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