Water Dog wrote:The article completely supports my point. All the doom is based on computer models. Models which remain untested, the excuse for which is a huge time lag. And that isn't to say this isn't the truth of the situation. The models could be accurate, although they can't all be accurate, but there could be an accurate one in the mix somewhere. But if there is no way to test the models until decades down the road, that's a problem. A big problem. It's not good science to base real-world decisions on faith. As an engineer, if I made decisions like that I'd be thrown in jail. The idea of upending the world's economy on the current body of work is patently irresponsible....
Of course such models can be tested. An approach a data scientist might take would be to create and calibrate a model based only on data that was collected through, say, 2006 (the year An Inconvenient Truth came out). Based upon that data, forecast what the climate would be through 2018. How good of a job did it do?
Or if you wanted to be more sophisticated, take it back even further. Pretend the date is 1998, and you are only using data available then to train a model to forecast the climate in 2008. To validate the model, see how well it fits what happened in 2008. After the model is validated, do a final test and forecast it all the way out to 2018 and see how well it fits then.
That train/validate/test approach is how a simple statistical forecast would be done. However, I'd expect a climate model to be remarkably better, because rather than just looking for statistical relationships between a target variable and independent variables, it is based upon the known underlying physics of the system.
Quoting Steven Pinker, "Anthropogenic climate change is the most vigorously challenged scientific hypothesis in history. By now, all the major challenges—such as that global temperatures have stopped rising, that they only seem to be rising because they were measured in urban heat islands, or that they really are rising but only because the sun is getting hotter—have been refuted."
We aren't talking about a coalition between a small group of underfunded Ivory Tower pointy heads making a coalition with communists and tree huggers to destroy the economy because they are upset Al Gore lost an election. We are talking about the most carefully and vigorously studied scientific hypothesis in history.
Aggressively dealing with the reality of this issue won't upend the world economy--retooling the economy to run off of clean energy would be an incredible economic boon.