The times are changing in the wake of Climategate. And more is to come as the polluted science embedded in the email exchanges gets reviewed by talented amateurs and pros alike on the blogosphere (see Climate Audit,  Roger Pielke Jr., and WattsUpWithThat, in particular).

Given time, the rethink will go mainstream. Scientists are truth seekers at heart, but an entrenched mainstream of climate scientists–so many of them friends and political allies–will need to be nudged out of their denialism.

Old voices are challenging their ‘mainstream’ colleagues, and new voices are coming forth. I have seen this clearly here in Houston (examples below), and I expect it is happening elsewhere.

Consider what Andy Revkin, the recently retired climate-change science writer at the New York Times, told the public editor at the Times regarding Climategate: “Our coverage, looked at in toto, has never bought the catastrophe conclusion and always aimed to examine the potential for both overstatement and understatement.”…

Matthew Curtin’s Heard on the Street in the December 22nd Wall Street Journal, Green Investments Are Being Clouded by Copenhagen, caught my eye. Copenhagen not so much failed as energy reality won. The 19th century British economist W. S. Jevons would have smiled as neo-Malthusian politics fell victim to old fashioned consumerism, economic growth, free trade, and energy economics 101.

Copenhagen also brings into review the risky political capitalism model where profit-making is tied to special political favor rather than underlying consumer demand. Enron’s core business model was tied to rent-seeking, part of the problems that brought down the company in spectacular fashion.

Here is what Mr. Curtin wrote:

The Copenhagen climate summit will do little to spur further investment in environmental technologies.

That is hardly surprising given the fundamental flaw at the heart of the process: Negotiations to reduce global carbon dioxide emissions were premised on how much of the gas nations produce, rather than what they consume.

Editor note: On November 10, 2009, Mr. Green testifedbefore the Senate Committee on Finance about global warming. During the course of his testimony, an obviously agitated Senator John Kerry (D-Mass.) challenged Ken on different aspects of the climate debate. His responses are printed here. [Part I of this series ran yesterday.]

1. Peer-Reviewed Publishing Revisited

Kerry seemed to think it somehow damning that I do not choose to publish in the peer-reviewed climate literature. First—as I pointed out when I introduced myself—while I am an environmental scientist by training, I have chosen to work on policy analysis, which I believe is as important as, or more important than, the science.

However, I would challenge his very premise, which is that peer review is a meaningful indicator of trustworthiness. Plenty of research suggests that peer review is deeply flawed, biased in favor of both extreme and “positive” claims, resistant to nonconfirmation studies, and highly incestuous, because review committees regularly screen out divergent viewpoints and consist of peers who coauthor work with each other.…

Editor note: On November 10, 2009 Mr. Green testifedbefore the Senate Committee on Finance about global warming. During the course of his testimony, an obviously agitated Senator John Kerry (D-Mass.) challenged Ken on different aspects of the climate debate. His responses are printed here. [Part II of this series is tomorrow.]

1. Not One Peer-Reviewed Paper Contradicts the “Consensus” View of the Climate Crisis
Sen. Kerry asserted that not one peer-reviewed paper contradicts the “consensus” view that greenhouse gas emissions will cause devastating consequences, and that we must limit their emissions radically to avoid the maximum “consensus” value of two degrees Celsius, which Kerry claimed was the point at which catastrophic damage would occur to the Earth’s climate. I offered to provide several.

Perhaps the central issue in climate science involves estimates of the sensitivity of the climate to anthropogenic greenhouse gas emissions.…