Fig. 3.

(A−E) Power spectral density for the individual reconstruction components for the 2.5-y Sine ENSO AGCM experiment using the averaged coefficients using the fast Fourier transform (FFT) method. (F) Power spectral density for the anomalous ensemble mean circulation index $\overline{\text{NWP}-\text{AC}\left(\text{t}\right)}$ for this experiment (light blue lines) and the full reconstruction (red lines) using all of the terms depicted in A−E. (G−K) Regression coefficient of the normalized respective reconstruction component and the anomalous surface stream function of this experiment: (G) E, (H) E², (I) ExA, (J) E²xA, and (K) ExSA. (L) Regression coefficient of the normalized full reconstruction time series and the anomalous surface stream function of this experiment.