Acoustic backscatter. Bottom reflectivity mapped with multibeam echosounder, 10 m grid. The strength of the acoustic signal reflected back from the seabed.

Stations where chemistry samples have been taken.

Barium (Ba) concentrations in surface sediments in Skagerrak and Norskerenna / Norwegian trench; raster map.

Mercury (Hg) levels in surface sediments in Skagerrak and Norskerenna / Norwegian trench; raster map.

Lead (Pb) concentration in surface sediments in Skagerrak and Norskerenna / Norwegian trench; raster map

Sediment thickness above bedrock on the Norwegian continental shelf.

Cadmium (Cd) levels in surface sediments.

Barium (Ba) level in surface sediments.

The map layer shows grain size composition in upper part of seabed sediments (upper ca 50 cm of the seabed). Grain size as a property describes the percentage of different grain size classes in a sediment or superficial deposit type. The maps are digitized with a view to presentation at a scale of 1:20 000 - 1:150 000 (detailed mapping).

The map layer features the landscape classification in the sea areas, defined as a larger geographical area with visually uniform character. The classification is based on bathymetry with 50 meter resolution and is part of the basis for the MAREANO habitat mapping. Read more about landscape http://www.mareano.no/tema/marine_landskap