Re: Climate Change Deniers...
by
EbenCooke
11/06/2009, 12:05 PM #
Marcus61:
...are actually attacking the climate change movement where it is weakest - in the science. You know, the part where hypotheses are tested against actual evidence. Hence the frantic calls by the climate change movement to do something - NOW! - before the long-term evidence is actually in (no evidence, no refutation of the hypothesis). And this is what makes the last decade's worth of actual world climate data so threatening (no warming), and why we don't hear too much about it.
The climate change movement is not about climate science, it's about radical policy choices that - surprise, surprise - empower central planners at the expense of ordinary Joes & Janes. These policy choices are so patently absurd - reduce GDP by 3-5% in 2020 in order to prevent climate change impacts that could reduce GDP by 3-5% in 2100 - that they are beyond the realm of rational debate....it's religion. And there sure ain't been much progress to be had in debating religions! Hence, debate the science, with the evidence....which is the way science is supposed to work.
In what sense is it "not about climate science" for scientists to study data, construct models according to that data, and make predictions about future behavior? Do you believe "science" is simply a compendium of truisms? Science is a process -- a methodology -- for constantly refining our understanding of the physical universe. It does not stand on Absolute Unchanging Truths, it stands on accumulation of information and understanding. Likewise, science seldom claims Absolute Certainty of its models, although the scientific community can definitely have different levels of surity about some current model.
The very concept of "proof" has fairly different meanings, according to whether you're talking about mathematics, logic, or physical science (or, for that matter, a court of law). In mathematics, a "proof" is a logical demonstration that a certain mathematical construct MUST work in a certain way, and cannot work in any other way unless we suspend the known logic of mathematics. It's a very rigorous standard, for the very reason that it is possible to make such proofs over many (not all) mathematical models. In the physical sciences, "proof" means accumulating enough data -- via observation and/or experimentation -- to establish some degree of certainty over the issue in question. It's always possible that future information may lead us to tweak the model -- or even completely re-make it -- although that becomes less and less likely as more and better information accumulates to support it. We're just not very likely to acquire any new information that might make us re-adopt the Ptolemaic model of the universe. As the certainty of a particular model becomes more and more established, it can be extended to explain and support other, related models.
In public policy-making, as in the physical sciences, waiting for Absolute Certainty is a futile exercise. At some point, it's necessary to say that we understand and trust the model enough to: a) confidently make predictions on it and b) develop technologies (policies) for managing or mitigating it. If, at some point in the future, we WERE to suddenly acquire Absolute Certainty of an impending climate disaster, it would almost certainly be far too late to mitigate it.
So, policy-makers always need to ask "do we have sufficient confidence to proceed on this path?" In the case of global warming, there is a range of actions we could reasonably take, given a reasonable level of trust in the model. Certainly, this could include actions that would have long-term benefits, even if the model later proved wrong -- for example, to reduce our dependence on fossil fuels would have benefits even if we knew it wouldn't affect global warming.
The fact that we can ferret out some contrarian scientists willing to poo-poo global warming is no reason to abandon wholesale any efforts to mitigate it or understand it better. Yes, contrarians can sometimes turn out to be correct. And, hey, who knows? maybe The History Channel WILL someday prove Bigfoot exists.