If you're "qualified" to be considered peer to those whose work you dispute, you may not just cite the geological data and ignore what is known about biological feedbacks. Prior to the Industrial Revolution, ie in the ice core record, CO₂ amplified Solar warming (Lorius et al., 1990 -- linked in the Real Climate article), PROVING its ability to also drive warming if, as it is now, any other process (such as combustion for humans' industrial and transportation use) increases the concentration of CO₂ in the atmosphere.
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On historical timescales, CO2 has definitely led, not lagged, temperature. But in any case, it doesn’t really matter for the problem at hand (global warming). We know why CO2 is increasing now, and the direct radiative effects of CO2 on climate have been known for more than 100 years. In the absence of human intervention CO2 does rise and fall over time, due to exchanges of carbon among the biosphere, atmosphere, and ocean and, on the very longest timescales, the lithosphere (i.e. rocks, oil reservoirs, coal, carbonate rocks). The rates of those exchanges are now being completely overwhelmed by the rate at which we are extracting carbon from the latter set of reservoirs and converting it to atmospheric CO2. No discovery made with ice cores is going to change those basic facts.
About Climate Change
Read the Article at HuffingtonPost
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