Here’s the Skew-T from the Polarstern at 12 UTC on 22 November. The color-filled ellipses show the layers in which cloud cover can be expected. The Skew-T also shows low-level moisture from the surface up to 810 hPa and a dry layer above that. This indicates low-level cloud with little vertical extent and the likelihood of some stratocumulus formation.
A photograph taken by the crew on the ship confirms the presence of some stratocumulus cloud cover at this time.