And as you know, there are theories and then there are theories. This particular theory is barely out of the blocks. Most of its support is circumstantial and coincidental. While there is plenty of evidence consistent with the theory’s premise that man may be influencing climate change, skepticism is still the intelligent response to the conclusion of some that man is the primary cause of the change.
There is always a degree of uncertainty largely due to experimental methods, accuracy of instruments and readings etc but we know to a greater than 99% certainty that for example under the same conditions acceleration due to gravity will be the same in virtually every instance.
We therefore have a better than 99% certainty how any given object will act under those same conditions therefore the theory is true.
The closest that can be determined with any certainty is that man’s contribution of CO2 to the enviroment might be having some small impact on global temps but no one can show experimentally to any degree of certainty how much.
So basically the evidence of climate change skeptics rely on is some mysterious periodic warming and cooling of the planet from which the evidence of cause is beyond our ability to determine.
Why do scientists even bother with all the research of past climate? Just to make a wavy time series chart and say that’s that? That is essentially what is being said.
By recording the data and plotting it. You don’t need to know the mechanics behind a pattern to know that the pattern exists. There are many such phenomena in nature that have a regular cycle, yet scientists know very little about why they occur.
No it isn’t. The past record essentially determines “normal” over a geologic era. And that record clearly shows a regular pattern of prolonged cold periods interrupted by relatively short warm periods, the last of which we are currently enjoying.