Fig. 7: Multidecadal variability of Antarctic SIE in the CMIP6 model control simulations and its relationship with mixed-layer depth (MLD).
From: Antarctic sea ice multidecadal variability triggered by Southern Annular Mode and deep convection
a Fourier power spectrum (solid) of detrended Antarctic SIE anomalies for the 1000-yr CanESM5 CTL simulation. The power density is normalized by its variance (\({\sigma }^{2}\)). A dotted line indicates 95% confidence level of the normalized power density using a chi-squared test. b–e Same as in (a), but for the 1200-yr CESM2, 2000-yr IPSL-CM6A-LR, 1000-yr MPI-ESM-1-2-LR, and 1200-yr INM-CM5-0 simulations, respectively. f Relationship between the annual mean MLD (in m) and the period (in years) of multidecadal SIE variability for the CMIP6 models and SPEAR_LO/MED models. Due to the limited availability of subsurface ocean variables, we removed INM-CM5-0 from the panel. The black solid line indicates a linear regression using the least square method and the correlation values is shown in the panel.
