Fig. 3: Composite anomaly maps for Ural Blocking events under strong and weak positive AO regimes at selected lag times. | npj Climate and Atmospheric Science

Fig. 3: Composite anomaly maps for Ural Blocking events under strong and weak positive AO regimes at selected lag times.

From: Enhanced persistence of Ural blocking under strong positive AO: the role of North Atlantic storm tracks and potential vorticity dynamics

Fig. 3: Composite anomaly maps for Ural Blocking events under strong and weak positive AO regimes at selected lag times.The alternative text for this image may have been generated using AI.

Each panel shows detrended 2-m temperature anomalies (shading, °C), 500-hPa geopotential height anomalies (contours, gpm), and wave activity flux (vectors, m2·s−2) for UB events under (left) SPAO and (right) WPAO at: a, b Lag −3 days, c, d onset date, e, f Lag +4 days, and g, h Lag +8 days. White dots indicate temperature anomalies statistically significant at the 95% confidence level based on a two-tailed Student's t test.

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