Anthony Watts has an article today about reproducibility of scientific experiments (archived here). It's mainly about medical and pharmacological research. It's not at all about climate science.
However I noticed that Anthony himself, in the opening paragraph, snuck in an example of what he reckoned couldn't be reproduced - it was Cook13, the research that examined the nearly 12,000 papers that were retrieved from a Web of Science search of scientific papers on global warming. That study in itself could be regarded as a reproduction and validation of other similar studies, which all found that going back over the past 20 years or so, around 97% of science on the subject supports the fact that humans are causing global warming.
So I was intrigued to find Anthony had written (my bold italics):
Reproducibility — the ability to redo an experiment and get the same results — is a cornerstone of science, but it has been the subject of some troubling news lately. In recent years, researchers have reported that they could not reproduce the results from many studies, including research in oncology, drug-target validation, and sex differences in disease (and climate with Cook et al. ).
What is Anthony Watts hiding? I wondered. Does that mean that he or someone else has tried to reproduce Cook13 and been unable to do so? If so, why is he hiding his working, results and code? Why hasn't he shouted to the world his effort to reproduce the study?
Of course, I thought, it could be that because he doesn't understand much science his failure to reproduce the results is simply incompetence on his part.
Replicating research vs replicating researchers
Anyway, Anthony provided a link - so I followed it. It turns out that it's got nothing at all to do with the research itself. Anthony didn't redo the work. He didn't even try to reproduce the results. All he did was link to a dumb letter from an idiot denier complaining that he can't get confidential information about the people who did do the research.
It looks as if Anthony Watts thinks that redoing research and reproducing results means that you have to replicate the researchers! What a nutter.
File this one under "Denier Weirdness".
PS The latest "reproduction" of this research is by James Powell, who's been checking the science for some time now. His latest analysis is from last year. What he found is illustrated below:
Cook, John, Dana Nuccitelli, Sarah A. Green, Mark Richardson, Bärbel Winkler, Rob Painting, Robert Way, Peter Jacobs, and Andrew Skuce. "Quantifying the consensus on anthropogenic global warming in the scientific literature." Environmental Research Letters 8, no. 2 (2013): 024024. doi:10.1088/1748-9326/8/2/024024