A lot of folks have asked me if I am going to comment on this
One of the fathers of Germany’s modern green movement, Professor Dr. Fritz Vahrenholt, a social democrat and green activist, decided to author a climate science skeptical book together with geologist/paleontologist Dr. Sebastian Lüning. Vahrenholt’s skepticism started when he was asked to review an IPCC report on renewable energy. He found hundreds of errors. When he pointed them out, IPCC officials simply brushed them aside. Stunned, he asked himself, “Is this the way they approached the climate assessment reports?”
I have not seen the book nor the Der Spiegel feature, but I can say that, contrary to the various memes running around, many science-based skeptics became such by exactly this process -- looking at the so-called settled science and realizing a lot of it was really garbage. Not because we were paid off in oil money or mesmerized by Rush Limbaugh, but because the actual detail behind many of the IPCC conclusions is really a joke.
For tomorrow, I am working on an article I have been trying to write literally for years. One of the confusing parts of the climate debate is that there are really portions of the science that are pretty solid. When skeptics point to other parts of the science that is not well-done, defenders tend to run back to the solid parts and point to those. That is why Michael Mann frequently answers his critics by saying that skeptics are dumb because they don't accept greenhouse gas theory, but most skeptics do indeed accept greenhouse gas theory, what they don't accept is the separate theory that the climate is dominated by positive feedbacks that amplify small warming from CO2 into a catastrophe.
This is an enormous source of confusion in the debate, facilitated by a scientifically illiterate press and alarmists who explicitly attempt to make this bate and switch so they can avoid arguing the tough points. Even the author linked above is confused on this
Skeptic readers should not think that the book will fortify their existing skepticism of CO2 causing warming. The authors agree it does. but have major qualms about the assumed positive CO2-related feed-backs and believe the sun plays a far greater role in the whole scheme of things.
This is in fact exactly the same position that most skeptics, at least the science-based non-talkshow-host ones have. Look for my Forbes piece tomorrow.