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HomeClimate CrisisMechanisms for Abrupt Summertime Circumpolar Surface Warming in the Southern Ocean

Mechanisms for Abrupt Summertime Circumpolar Surface Warming in the Southern Ocean


Fig. 8.

Comparisons of SAM and Southern Ocean SST variability in the 40-member CESM1-LE with observations for 1982–2020. (a) Probability density distribution of the November–January (NDJ) SAM index in the CESM1-LE. (b) As in (a), but for domain-averaged DJF Southern Ocean SST anomalies across 50°–65°S. (c) Composites of domain-averaged DJF Southern Ocean SST anomalies in relation to NDJ SAM and ENSO. (d) As in (c), but showing NDJ Southern Ocean MLD anomalies. For the CESM1-LE results, anomalies refer to deviations from the ensemble mean. In (a) and (b), the frequency distributions of SAM and Southern Ocean SST are generated using 0.5 standard deviations and 0.1°C bins, respectively. For the observed seasonal averages shown here, the listed year represents the year the season begins.

Citation: Journal of Climate 36, 20; 10.1175/JCLI-D-22-0501.1



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