Figure 10: Composite anomaly distribution fields for the air temperature (°C) at 300 hPa level (brown contour) and 200 hPa level zonal components of the wind pattern in ms−1 (black contour) at both (a) and (b); 700 hPa stream function (1 × 106·kgs−1) at (c, d) during anomalous (a, c) and (b, d) during suppressed periods of HREs. The shading (from a–d) denotes significant areas at 95% confidence interval.