Simulated and ERA5 fields on 24 March 2019 at 1900 UTC over the region around Jan Mayen.

The colourmap represents the temperature at 900 hPa (°C), the black isolines represent the geopotential height at 900 hPa (dam, contours every 1 dam), and the arrows represent the horizontal wind at 900 hPa. The white dashed line represents the sea ice edge, which is defined as the 0.15 contour of the sea ice concentration. ERA5 fields have been interpolated to the grid of the simulation using bicubic interpolation for the temperature and geopotential height, and bilinear interpolation for the horizontal wind and sea ice concentration. The sea ice edge in ERA5 corresponds to the 24 March 2019 at 1200 UTC. The dataset used to plot the geographic contours has been obtained from the GSHHG [33] under a CC BY license, with permission from Dr. Paul Wessel.