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How to Forge a Consensus
...But the furor over these documents is not about tone, colloquialisms or even whether climatologists are nice people in private. The real issue is what the messages say about the way the much-ballyhooed scientific consensus on global warming was arrived at in the first place, and how even now a single view is being enforced. In short, the impression left by the correspondence among Messrs. Mann and Jones and others is that the climate-tracking game has been rigged from the start.

According to this privileged group, only those whose work has been published in select scientific journals, after having gone through the "peer-review" process, can be relied on to critique the science. And sure enough, any challenges that critics have lobbed at climatologists from outside this clique are routinely dismissed and disparaged.

This past September, Mr. Mann told a New York Times reporter in one of the leaked emails that: "Those such as [Stephen] McIntyre who operate almost entirely outside of this system are not to be trusted." Mr. McIntyre is a retired Canadian businessman who fact-checks the findings of climate scientists and often publishes the mistakes he finds—including some in Mr. Mann's work—on his Web site, Climateaudit.org. He holds the rare distinction of having forced Mr. Mann to publish a correction to one of his more-famous papers.

As anonymous reviewers of choice for certain journals, Mr. Mann & Co. had considerable power to enforce the consensus, but it was not absolute, as they discovered in 2003. Mr. Mann noted to several colleagues in an email from March 2003, when the journal "Climate Research" published a paper not to Mr. Mann's liking, that "This was the danger of always criticising the skeptics for not publishing in the 'peer-reviewed literature'. Obviously, they found a solution to that—take over a journal!"

The scare quotes around "peer-reviewed literature," by the way, are Mr. Mann's. He went on in the email to suggest that the journal itself be blackballed: "Perhaps we should encourage our colleagues in the climate research community to no longer submit to, or cite papers in, this journal. We would also need to consider what we tell or request of our more reasonable colleagues who currently sit on the editorial board." In other words, keep dissent out of the respected journals. When that fails, re-define what constitutes a respected journal to exclude any that publish inconvenient views. It's easy to manufacture a scientific consensus when you get to decide what counts as science....