Notes on CO2 and sea level

While reading this blog post I came across this interesting comment from someone called " ferd berple"

1. the ice cores show that CO2 lags temperature by about 800 years. This establishes that temperature drives CO2, by a well accepted principle that cold water can hold more CO2 than warm water.
2. if CO2 ALSO drove temperature, then as more CO2 dissolved in the cold ocean during an ice age, and global CO2 levels fell, it would be impossible for the ice age.
3. similarly, if CO2 ALSO drove temperature, then as more CO2 came out of solution as the oceans warmed at the end of an ice age, it would be impossible for there to be a second ice age.
4. since we have been in a pretty regular series of ice ages every 100k years for a couple of million years, this is strong evidence that CO2 cannot be driving temperature. If it did, then we would either be stuck in a low CO2 ice age, or high CO2 warm age. Transition between the two would not be possible given the small irregularity in the earth’s orbit. Yet we see a regular transition in time with a beat frequency of the earth’s orbit.

I think this is quite important and well said