Data was gained from a tiled Digital Elevation Model (DEM) that derives from a combination of the GEBCO_08 grid and more than 60 high-resolution data sets of bathymetric soundings (W. Puls, unpublished data). The original resolution increases from 50 m in nearshore zones to 400 m in the open North Sea. We resampled the DEM on the 1 by 1 nautical mile (nm) prediction grid before water depth was queried at each sediment sample position.

Data was gained from a tiled Digital Elevation Model (DEM) that derives from a combination of the GEBCO_08 grid and more than 60 high-resolution data sets of bathymetric soundings (W. Puls, unpublished data). The original resolution increases from 50 m in nearshore zones to 400 m in the open North Sea. We resampled the DEM on the 1 by 1 nautical mile (nm) prediction grid before water depth was queried at each sediment sample position.