Correlations of decrease in Average worldwide temperature and volcanic activity are high.
Correlation of increase in average worldwide temperatures and El Niño events are high.
Correlation of atmospheric CO2 centration and temperature increases are extremely weak or nonexistent. See Pearson Correlation analysis.
The total atmospheric CO2 concentration represented by the Mauna Loa, Hawaii Keeling curve shows an almost straight line degree of annual change from 337 ppm in 1979 to 408 ppm in 2018. The rate of change in annual anthropogenic global fossil-fuel carbon emissions is shown to be, in five year time frames, from 1979 to 1999, as follows; 1979-84 -89, 1984-89 +817, 1989-94 +169, 1994-99 +344, 1999-2004 +1,197, 2004-2009 +933. This shows that the Keeling curve reflecting total atmospheric CO2 concentration is not materially affected by annual anthropogenic global fossil-fuel carbon emissions.
For a discussion of the approximately 33% increase in CO2 from 1979 to 2018 and its origin see: “The phase relations (leads/lags) among atmospheric CO2 content, temperature and global ice volume are key to understanding the causes of glacial-interglacial (G-IG) climate transitions.”
For a statical analysis of the responsiveness of atmospheric CO2 to Fossil Fuel Emissions see this paper by Jammal Munshi, Ph.D.
For a table of all “atmospheric greenhouse gases” and their relative effect on warming see: Anthropogenic (man-made) Contribution to the “Greenhouse Effect,” expressed as % of total
For an instructive tutorial explaining natural variations including solar, planetary movement, El Nino. Volcanic activity and the like see: AGW Tutorial
Annual Global Fossil-Fuel Carbon Emissions
Yearly temperature variation and atmospheric CO2 levels. See the correlation?
Forty years of annual temperature variations and atmospheric carbon dioxide concentrations are presented on one chart. There is no correlation between CO2 and temperature. None! Never in the course of human events has man spent so much money on so little…. But then what’s a trillion dollars here and a trillion dollars there?
Temperature variation is based on the UAH satellite based lower tropospheric data set. This is presented as the 30 year average, 1981-2010. It does not change the ranking; it is merely an additive offset. For yearly averages one could just use the raw temperatures, but scientists use monthly anomalies so much, it’s important to have removed the seasonal cycle, which dominates the variability. The Carbon Dioxide (CO2) curve is the universally accepted Keeling curve based on the Mauna Loa, Hawaii monitoring station and obtained from the NOAA data base. The red sinusoidal lines through the CO2 curve represent the seasonal variations caused by plant life CO2 intake.