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.
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.