Posts Tagged ‘atmospheric co2 concentration’

Carbon dioxide lags “global temperature” by 9 – 12 months

February 23, 2013

Just another case of an effect being taken as a cause and yet another nail in the coffin of the “CO2 causes global warming” fantasy.

A new paper in Global and Planetary Change Volume 100, January 2013, Pages 51–69

The phase relation between atmospheric carbon dioxide and global temperature 

by Ole HumlumKjell Stordahl and Jan-Erik Solheim


  1.  Changes in global atmospheric CO2 are lagging 11–12 months behind changes in global sea surface temperature. 
  2. Changes in global atmospheric CO2 are lagging 9.5–10 months behind changes in global air surface temperature.
  3. Changes in global atmospheric CO2 are lagging about 9 months behind changes in global lower troposphere temperature.
  4. Changes in ocean temperatures explain a substantial part of the observed changes in atmospheric CO2 since January 1980.
  5. Changes in atmospheric CO2 are not tracking changes in human emissions.
Figure 5 Humlum et al 2013

Fig. 5. 12-month change of global atmospheric CO2 concentration (NOAA; green), change in global surface air temperature (NCDC; blue), land surface air temperature (NCDC; yellow) and ocean surface air temperature (NCDC; red dotted). All graphs are showing monthly values of DIFF12, the difference between the average of the last 12 months and the average for the previous 12 months for each data series.

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