Figure 2

September-October-November (SON) linear trend between 1979 and 2014 of (a) NOAA’s ERSSTv4 tropical SST, (b) Southern Hemisphere ERA-Interim 500 hPa geopotential height and wind, and (c) western West Antarctic ERA-Interim 2 m temperature and 500 hPa wind. Shading indicates where trends are significant at p < 0.10, p < 0.05, and p < 0.01 as indicated by color bar at the bottom. Wind vectors are in units of ms⁻¹ decade⁻¹ and are drawn only if at least one component is significant at p < 0.10. Contour interval is 0.1 °C decade⁻¹ in (a), 4 m decade⁻¹ in (b), and 0.3 °C decade⁻¹ in (c).