Personally I believe in climate change but how are data points like this supposed to prove/disprove? Only ~12000 years ago there was a shift from the ice age and rapid flooding. Probably not man made and very recent. All evidence points to climate change being semi-cyclical and around as far back as we can gather data points. The cycles are very long relative to individual human lifespans but very short and frequent in the grand scheme. To me this is reason enough to make an educated guess that humans can affect the climate with our outputs. But it also makes it nearly impossible to disentangle natural changes from man made ones using science.