Extended Data Fig. 7: The climatology and relationship of the minimum sea level pressure within cyclones and the Arctic Oscillation.

The June-August mean for 1980–2020 in (a) the minimum sea level pressure (SLP) within cyclones, (b) the correlation between cyclone SLP anomalies and the Arctic Oscillation with yellow dots indicating correlations with 95% statistical significance, (c) cyclone SLP anomalies regressed onto the Arctic Oscillation index, (d) the linear response (composite difference) in cyclone SLP anomalies to the Arctic Oscillation, (e) the nonlinear response (composite sum) in cyclone SLP anomalies to the Arctic Oscillation, and (f) cyclone SLP anomalies regressed onto the first principal component of cyclones. The light grey contours in panels (c)-(f) are the corresponding results using 1000-hPa geopotential height anomalies.