The CO2-induced “polar amplification” narrative peddled by climate alarmists has just taken another hit.

It has previously been shown increasing CO2 by over 120 ppm (278 ppm to 400 ppm) cools the Antarctic climate (Notholt et al., 2024).

These scientists found there has been a slight (-0.01°C) overall net cooling CO2 influence since 1750.

Image Source: Notholt et al., 2024

Now a new study shows increasing the greenhouse gases CO2 and CH4 radiatively cools the Arctic too.

Rising concentrations of greenhouse gases – presumed to be derived from anthropogenic emissions – induce Arctic cooling “primarily due to the near-saturation of infrared absorption [CO2 and CH4] in the lower atmosphere”.

“In the lower atmosphere (>700 hPa), the magnitude of the CO2 kernel decreases significantly, indicating a weaker suppression of outgoing longwave radiation by increased CO2 concentrations.”

“In the lower atmosphere, from the surface to approximately 400 hPa, the heating rate [derived from increasing CO2] exhibits relatively large negative values, indicating strong radiative cooling.”

“…the heating rate remains negative at all levels, indicating the longwave radiation leads to net atmospheric radiative cooling.”

“…the observed vertical structure enhances outgoing longwave radiation compared with the uniform distribution, thereby strengthening radiative cooling in the Arctic atmosphere.”

Image Source: Qin, 2026

If increasing CO2 leads to Antarctic and Arctic radiative cooling, CO2 cannot be a driver of polar ice sheet, glacier, or sea ice melt.