Yet more studies showing overwhelming scientific consensus on climate change out last week. Deniers won’t hear of it.

In fact, the overwhelming science consensus just proves they were right all along!

David Appell at Quark Soup:

Judith Curry just highlighted something from somebodies on some blog which (naturally) she agree with:

“In our view, the fact that so many scientists agree so closely about the [causes of the] earth’s warming is, itself, evidence of a lack of evidence for [human caused] global warming.” – D. Ryan Brumberg and Matthew Brumberg

This is a truly hilarious statement, that could only have been made by nonscientists. (I haven’t been able to identify these Brumberg chaps, but I’d bet.) That any scientist, even Curry, would agree with it is quite puzzling.

By there logic, there is absolutely no evidence whatsoever for the existence of atoms or conservation of energy, because there’s a universal consensus on both.

Look: scientists agree about a great deal in science — yes, consensus is everywhere except at the edges where research is taking place — and the sciences that are used to calculate global warming from the many possible physical sources is very well-established science. All scientists agree on the basic laws of quantum mechanics, including the Planck Law (its integral is the Stefan-Boltzmann law), and radiation physics, and the absorption/emission spectrums of the greenhouse gases. As well as the thermodynamics and other physics that go into atmospheric dynamics, which again, are not that complicated and about which there is near-universal agreement.



Given all this, it’s just a matter of analyzing and calculating. The consensus of the underlying sciences doesn’t mean the calculations are easy — they certainly aren’t, especially for the particulars of the carbon cycle. (Not many deniers seem to realize that the radiative transfer parts of global warming science are among the best known parts of the subject, because they are the most amenable to the standard techniques of analytical physics that physicists have been doing for a long time and are very good at.) Calculating climate sensitivity, which decades of successively more thorough calculations find to be ≈ 3°C ± 1.5°C (note: the uncertainty here just represents the range, not the standard deviation or uncertainly limit), is probably the most difficult calculation scientists have ever attempted. The error bars are still bigger than anyone would like — but it may not be able to reduce them much more — but not nearly so big as to justifying ignoring the problem or, given the huge amounts of greenhouse gases we’re emitting, waiting for more information while the world keeps warming about about 0.15-0.2°C/decade, which has been the 30-year trend for over a quarter of a century now.

But scientists certainly haven’t ignored all other potential causes of modern warming besides anthropogenic GHGs — indeed, they’ve looked at them very thoroughly. Because that’s what scientists do and how they operate. It’s simply that the the data on other possible causes (like changers in solar irradiance) simply do not show they can create as much warming as we’re seeing, by a long shot.

And no scientist accepts AGW because there is a “consensus” about it. Again, that’s not how the scientists in the field operate (though, knowing what consensus is and isn’t, scientists in other fields, knowing how science operates, tend to accept as the consensus as what scientists in the field say it is).

The funny thing is, the absolute best way for any scientist today to get noticed, get tenure, and certainly become famous, would be to prove AGW is wrong. There’s a good reason that doesn’t happen — AGW isn’t wrong.

Meanwhile, the theory and data on the enhancing the greenhouse effect do show the warming expected from aGHGs, within uncertainties.

Whoever these Brumberg fellows are, they have a poor understanding of science, including the science of anthropogenic global warming. And their excuse is not just laughable, but desperate.

The warmer it gets, the more nuts are falling out of the trees.