Extended Data Fig. 8: Modelled link between DWBC velocity, DLSD and AMOC in the HiGEM model.
From: Anomalously weak Labrador Sea convection and Atlantic overturning during the past 150 years
a, Correlation (colour bar) of the vertically averaged ocean density (at 1,000–2,500 m) with the DLSD index (as defined in ref. 4; green box, 1,000–2,500 m average) in a 340-year present-day control run of the HiGEM model (see ref. 36). b, Climatology of the modelled meridional ocean velocity (in m s−1) averaged between 30° N and 35° N, illustrating the modelled position of the DWBC. The y axis shows the water depth in metres. c, Cross-correlations between the modelled average DWBC flow speed in the pink box in panel b and indices of DLSD and AMOC at 45° N (the dashed line omits the Ekman component). We note that the box over which the DWBC flow index in panel c is averaged has changed with respect to Fig. 1, in order to take into account of the fact that the return flow is deeper in the HiGEM model than in HadGEM3-GC2.
