Your Own IPCC Climate Computer

The Hockey Schtick
"...Climate computer uses only 97% of the IPCC model of total positive radiative forcing since only 97% of it comes from CO2: temperature anomaly=4.7*ln(ending CO2/starting CO2).Model only applies to the 20th and 21st centuries since temperature anomalies bear no relation to the Medieval Warming Period with much lower CO2 levels or the geologic record with CO2 levels in the mid-1000s per million throughout ice ages. "