Fig. 4: The PMM index in CMIP6 GCMs.
From: Disentangling the North Pacific Meridional Mode from tropical Pacific variability
a Correlations between the PMM and the PMM_PCA for the NCEP/NCAR Reanalysis and 44 coupled general circulation model (GCM)s from the CMIP6 intercomparison. For the models, the PMM is taken as the MCA mode that has the highest pattern correlation with the PMM mode of the NCEP/NCAR reanalysis. The models for which this is not the first MCA mode are shaded in light blue. b As in (a), but for the correlation of the PMM with SST averaged over the area shown in Fig. 1c. c Second EOF of the PCA of SST for the NCEP/NCAR reanalysis. d As in (c) but averaged over the CMIP models for which the PMM is the first MCA mode. e As in (c) but averaged over the CMIP models for which the PMM is not the first MCA mode (light blue shading in (a)). All correlations shown in (a) and (b) are significant at the 95% confidence level.
