Fig. 3: Sensitivity to the index used for ENSO removal.
From: Disentangling the North Pacific Meridional Mode from tropical Pacific variability
a, c, e, g Lagged regressions of anomalous SST (°C, shading), surface winds (m s−1, vectors), and sea-level pressure (contours, interval of 0.25 hPa) onto the MAM reference PMM index. The individual panels show, from top to bottom, seasonal averages for winter (DJF), spring (MAM), summer (JJA), and fall (SON). Only values significant at the 95% confidence level are shown. b, d, f, h Like (a, c, e, g), but for the PMM_CPCT index, for which the ENSO signal is removed more thoroughly prior to analysis. All fields are from the NCEP/NCAR Reanalysis.
