Does climate work in an opposite sense to climate models?

CO2 is higher at the Poles than the Equator. When air warms, CO2 goes down and water vapor goes up. The warming effects of CO2 and water vapor do not add; they oppose each other. This is opposite of IPCC claims. It is explained in a recent paper; but is not an empirical claim; nor is the IPCC climate feedback supported by observation!