What is the effect on global temperature of an increase of 0.01% Co2 (100ppm) in the atmosphere. What is the physical process that allows this extra CO2 to have such an effect? Is it radiation absorption?

https://www.quora.com/What-is-the-effect-on-global-temperature-of-an-increase-of-0-01-Co2-100ppm-in-the-atmosphere-What-is-the-physical-process-that-allows-this-extra-CO2-to-have-such-an-effect-Is-it-radiation-absorption/answer/

https://www.quora.com/What-is-the-effect-on-global-temperature-of-an-increase-of-0-01-Co2-100ppm-in-the-atmosphere-What-is-the-physical-process-that-allows-this-extra-CO2-to-have-such-an-effect-Is-it-radiation-absorption/answer/TL-Winslow