Arctic amplification

Polar amplification factor (PAF)

The PAF is computed as the ratio between the waring in near-surface temperature (tas/TREFHT) over the Arctic (north of 60N) and the global-mean warming.


Warming anomaly difference

Fields show the difference between the Arctic warming anomaly and the global warming anomaly, computed from the near-surface temperature. Fields are area-averaged globally. Solid lines show the area-averaged mean values. Shading (currently only available for the CMIP6 historical run) show the ensemble spread in terms of +/- one standard deviation.