Ok, perhaps I will be more specific.... (1) The models I am talking about don't work the way you describe. You provide basic inputs and they provide a (regionally resolved) prediction of the weather on a statistical basis only. That is, a frequency distribution for average temps or rainfall, means and std deviations. They say that now there is a 1% chance of a 'century severity' drought, but with 2050 predicted CO2, that sort of drought will happen in 30% of years. That sort of thing. This sort of modl cannot tell us what happens next year or last. IOW, your requirement is not well posed. (2) I don't read the IPCC report, and I agree the assumptions of the climate cycle on millenia timescales are not nailed down. But I think that atmospheric CO2 historically has not changed 50% in 100 years anytime in the last 200000 years. This implies an unusual and hard to explain event--consistent with anthropogenic source. Your bland statement of 'not well understood' masks what we do know versus what we don't know re how unusual the recent past is. (3) Your poster looks like a single data point record not matching someones particular expectations over a finite time interval that is much shorter than the Mil. cycles. How that is relevant to the climate modeling over the longer span, aggegating records form many sites eludes me. In fact, I said that recent (<2000 yr) history has been anomalous, and your poster says something vaguely similar. How is that a refutation??