From the [pre-publication] paper, solar irradiance contributed 0.40 (74%) of the 0.54°C warming from 1880-2000, and CO2 contributed .09°C (17%) (and note man-made CO2 emissions only constitute 3-4% of the atmospheric CO2- therefore the man-made CO2 contribution to temperature would be 0.0036°C):
Contributions to Global Warming in the 20th Century
1940-2000 1880-2000
Solar irradiance 0.17 0.40
rfCO2 0.20 0.09
rfCH4 0.11 0.03
rfN2O 0.002 0.03
Total 0.48 0.54
Change in temperature 0.43 0.54
Related: IPCC's Most Essential Model Errors
1940-2000 1880-2000
Solar irradiance 0.17 0.40
rfCO2 0.20 0.09
rfCH4 0.11 0.03
rfN2O 0.002 0.03
Total 0.48 0.54
Change in temperature 0.43 0.54
Contrast to the IPCC AR4 models which assume that CO2 accounts for 97% of positive forcing of climate change and that solar irradiance positive forcing is a mere 7% of that of CO2:
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