evidence: A new study concludes that some of the latest-generation climate models may be overly sensitive to carbon dioxide increases and therefore project future warming that is unrealistically high. [...] "Some of the newest models used to make future predictions may be too sensitive to increases in atmospheric carbon dioxide and thus predict too much warming," said U-M’s Chris Poulsen, a professor in the U-M Department of Earth and Environmental Sciences and one of the study’s three authors. [...] Ten of the 27 CMIP6 models have an equilibrium climate sensitivity higher than 4.5 C (8.1 F), meaning that they are more sensitive to CO2 increases than most previous-generation models. CESM2 is one of those CMIP6 models and has an equilibrium climate sensitivity of 5.3 C (9.5 F).