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Originally Posted by dmr81
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There is more than just solar irradiance variations. There are indirect influences such as the hypothesized cosmic ray influence. There is the large body of evidence demonstrating a significant solar-climate influence on both short and long time scales - including the 20th century. The summary report I linked to has absolutely no significant discussion on any of this - as if the science of the Sun's influence in climate doesn't even exist. Now the larger report you linked to has some more substantive discussion, but given that they talk about large uncertainties in the modeling of indirect solar influences one has to wonder how they can conclude that the solar influence is negligible. Given that the ignore the research on much larger time scales, that conclusion would seem very premature.
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Being hypothesized does not make something mainstream.
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Where did I say that it did? I never said that the cosmic ray research is mainstream. I said that the IPCC does not do an adequate job of addressing the research on the solar influence - of which there is a large body of research in journals such as Geophysical Research Letters, climate journals, astronomical journals, oceanic journals ... Given that they don't adequately address this research it is pointless to argue about whether cosmic ray influences on climate should be treated as ATM or not. The IPCC's treatment of solar-climate research is too inadequate to conclude that its absence from their report makes the researhc ATM.
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Being accepted by the mainstream does. The forcings that are accepted by the mainstream are included in the IPCC report.
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Sure, it is quite clear how the IPCC defines mainstream. That doesn't mean the IPCC has adequately addressed the solar influence in climate.
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You are looking at the summary report there. Chapter 2 of WG1 has more detail on solar variability. There isn't more about it in the summary because it has very little importance in the recent climate change.
http://ipcc-wg1.ucar.edu/wg1/wg1-report.html
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Again, I wonder how the IPCC could conclude that when they are claiming large uncertainty in the indirect solar forcing. That's a premature conclusion. They actually should take a look at the full scope of research on the sun-climate connection.
Extensive research on the Sun-climate connection is easy to find for anyone that is interested in considering it.