Citizen Runner wrote:(1) The Law Dome ice core doesn't have a 1500 year moving average, it has ~30 year moving average.
(2) Atmospheric CO2 causes warming by the greenhouse effect. Warming causes a rise in atmospheric CO2 by reducing the dissolved gas carrying capacity of the oceans. That's a simplistic view of a system that involves more variables, but it's essentially the "have it both ways" cause and effect relationship. Clearly the interactions involved in global climate are complex but, at some reasonable level, not beyond understanding.
(1) They only have about 1000 years of data, so the best we can conclude is that the 30 year average value has not exceeded some limit in the last ~ 1000 years. Which doesn't tell us very much.
(2) Yes, very simplistic view of a very complex system. Again, exactly my point.