So 64 pages in and none of the warmers can answer the OP. How much warming is our contribution of CO2 to the atmosphere causing?
Answer = zero and even if the magic existed to some small degree,(which it doesn't) the amount would be so small as to be hopelessly lost within natural variation.
Actually, it has been addressed a number of times. That the answer wasn't what you wanted or expected is no one else's problem but yours. But let's look at the OP for a moment, shall we?
The question of how much warming will result from adding carbon dioxide to the atmosphere is what we skeptics are skeptical of. The climate system is amazingly complex, and the IPCC position that elements within the climate system (especially clouds) will change in ways which amplify the resulting small warming tendency is highly questionable, to say the least. If the climate system instead acts to reduce the warming, then anthropogenic global warming (AGW) becomes for all practical purposes a non-issue.
Problems with his thesis are:
1) He makes an unsupported assumption that the IPCC position is incorrect. Unsupported because it is simply a statement of opposition to the IPCC position, not a valid argument presented with evidence backing up the statement. If the IPCC had made their statements in the same way, they'd be the laughing stock on the planet. But for some reason, he gets a pass when he does it.
2) He makes another (qualified) assumption that if the IPCC position is incorrect, then somehow the climate will shrug off its heat build up with out even bothering to suggest how that is even physically possible. The heat has to go somewhere. It doesn't get magically transported to Vulcan and solve our problem. If it is not being radiated back into space, then it stays in the atmosphere or is absorbed into the land, the biosphere, the sea, and/or all of the above.
Either way, without presenting supporting evidence, his thesis is untenable, to say the least.