- the Arctic sea-ice area (Fig. 1) and volume (Fig. 2) in March and September
- the latitudinal transect of northward Atlantic ocean heat transport averaged over 2000-2014 (Fig. 3)
from some of the [CMIP6](https://esgf-node.llnl.gov/search/cmip6/) historical runs (data kindly downloaded by Klaus Zimmermann). Also shown are the multi-model means (thick dashed black curve) and observations/reanalysis (thick solid black curve).
