It’s impossible to do experiments to validate that human activity is causing global warming. You can’t experiment on the climate. Instead scientists look at measurements and try and develop models that can predict what’s going on. If scientists could develop models and prove that those models were capable of accurately predicting future climate then that would be an experiment.
If a computer model predicts climate for the next 40 years and after 40 years it turns out to be correct you have good reason to believe that it will accurately predict the climate. Of course we haven’t had time for that sort of validation. Therefore scientists look to see if models can model what happened in the past without essentially building the past results into their model.
Interestingly enough scientists haven’t been able to accurately model the climate in the past or predict the future climate. Climate models didn’t predict the current global cooling phase they’ve now declared is occurring until after it started.
There is a difference between climate and weather but a 10 year cooling period is climate. That none of the models that supposedly show that mankind is causing global warming predicted that 10 year event before it started makes it pretty clear that those models aren’t accurate. Hopefully that will improve but until it does it’s irrelevant if “most” scientists believe that mankind is causing global warming. Just as it would be irrelevant if “most” scientists believed that the Mets were going to win the next World Series.
Sunday, February 27, 2011
The issue of Human activity causing Global Warming: