Top panel: Climatological 300mb DJF zonal wind component from reanalysis data. 5m/s contour interval.

Middle panel: One point correlation plot for mean DJF 300mb streamfunction departures from AMIP ensemble averages (i.e., internal variability) with central point at (60E,24N). 0.1 contour interval. This shows how low-frequency disturbances are trapped in the jetstream waveguide.

Bottom left: Correlation of mean DJF 300mb streamfunction CCM3 AMIP internal anomalies with an Atlantic index of the internal variability of the North Atlantic Oscillation. 0.1 contour interval.

Bottom right: Same as left panel except for mean D,J,F departures from centered 90 day averages from nature. These show that the NAO pattern projects onto a global wave-trapped disturbance. 0.1 contour interval.