In response to Pekka Pirilä who said on May 29, 2011 at 11:54 am «Attributing the greenhouse effect to various gases was discussed in a recent paper Schmidt, G. A., R. A. Ruedy, R. L. Miller, and A. A. Lacis (2010), Attribution of the present - day total greenhouse effect, J. Geophys. (judithcurry.com)
Again, these 32C are not explained by CO2 alone but by the total greenhouse effect (including clouds). (realclimate.org)
This is shown by the fact that estimates of the effect on global temperature from a doubling of CO2 have not moved significantly (even as a function of the fraction of the total greenhouse effect) since the turn of the century. (realclimate.org)