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Sand dunes at a depth of 40 meters on Spitsbergenbanken, formed by strong bottom currents. The resolution is one meter grid (1 meter intermediate depth points). Terrain model: Kartverket / Mareano

Photo: Kartverket/Mareano

MAREANO Annual Report 2020

This report gives an overview of conducted mapping surveys and programme results/deliverables of the MAREANO programme in 2020. A summary in English is included, the rest of the report is in Norwegian.

MAREANO is a national, interdisciplinary programme which objective is mapping the Norwegian ocean floor.  The  mapping  data  includes  bathymetry,  seabed  substrate,  biodiversity,  natural  habitats  and sediment  contamination,  and  supplies  up-to-date  knowledge  tomanagement  agencies,  industry, academia and the general public.

To date a total of c. 287660 km2 of bathymetry data have been acquired by MAREANO. Additionally, bathymetry from external parties have been used. The bathymetry forms the basis for the planning of sampling cruises and the mapping of the geological, biological and chemical environmental conditions of  the  seafloor.  Up  until  now,  a  total  of  229613 km2 of  seafloor  have  been  sampled  in  the  field regarding its geology, biology and chemistry. High resolution bathymetry data are also important for the modelling of nature types and biotopes, as well as potential occurrences of cold-water coral reefs.

Surveys and sampling in 2020

Bathymetry surveys:

  • The Spitsbergenbanki the BarentsSea: 3708 km2
  • SUM of bathymetry surveys 3 708 km2

Geological, biological and chemical sampling:

  • Frøyabanken (1536 km2)
  • Sula trekant (218 km2)
  • Sula-Halten (353 km2)
  • Haltenbanken (2680 km2)
  • Halten-Iverryggen (125 km2)
  • Sklinnabanken (635 km2)
  • Sklinnadjupet (900 km2)
  • Sklinna vest (1312 km2)
  • Transekt NS-E-W, deler a-e (1818 km2)
  • Trænadjupet (595 km2)
  • Trænabanken (1161 km2)
  • SUM of geo-bio-chem-sampling Norskehavet 11 333 km2

New in 2020

Based on the results of the contamination study (reported in 2019) the traditional sampling tubes have been replacedwith steel tubes especially developed for microplasticsampling.

Potential  coral  mounds:  The  method  was  further  developed  in  2020  and  now  includes  a  semi-automatic step that extracts areasfor further analysis, increasing the efficiency of the method.

Dissemination of results in 2020

  • 13peer-reviewed papers
  • 20presentations/poster on meeting and conferences
  • 177 news stories
  • EMODnet (bathymetry, geology, biology, biotopes/nature types)
  • Faglig forum (Management Forum of the Norwegian Sea areas) & Overvåkingsgruppen
  • Olex and Sailorsmate (chart plotters onboard fishing vessels)

Annual report 2020

Read the MAREANO annual report 2020 (pdf)


Photo of Maud Lauvstad Hansen

Maud Lauvstad Hansen

905 28 126
Photo of Frithjof Moy

Frithjof Moy

Institute of marine research
Biological mapping
478 00 024