Changing Arctic Ocean Programme oceanographic dataset (2017-present)

Data set information

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Data holding centreBritish Oceanographic Data Centre
CountryUnited Kingdom  United Kingdom
Time periodOceanographic data collected from June 2017 to present
Geographical area

Barents Sea


Quality control flags; Vertical spatial coordinates; Air pressure; Atmospheric humidity; Particulate total and organic carbon concentrations in the water column; Dissolved organic carbon concentration in the water column; Raw fluorometer output; Bathymetry and Elevation; Particulate total and organic nitrogen concentrations in the water column; Optical backscatter; Raw oxygen sensor output; Light absorption in the water column; Dissolved total and organic nitrogen concentrations in the water column; Raw suspended particulate material concentration sensor output; Phaeopigment concentrations in the water column; Salinity of the water column; Temperature of the water column; Metadata parameters; Horizontal platform movement; Chlorophyll pigment concentrations in water bodies; Solar Radiation; Dissolved oxygen parameters in the water column; Horizontal spatial co-ordinates; Platform or instrument orientation; Visible waveband radiance and irradiance measurements in the atmosphere; Visible waveband radiance and irradiance measurements in the water column; Electrical conductivity of the water column; Transmittance and attenuance of the water column; Air temperature; Density of the water column; Raw light meter output; Wind strength and direction; Horizontal velocity of the water column (currents)




The Changing Arctic Ocean (CAO) oceanographic dataset comprises data collected in the Arctic Ocean, including the Barents Sea and Fram Strait, as part of the Changing Arctic Ocean programme. The data were collected over multiple research cruises starting in June 2017. The majority of these cruises were conducted during the Arctic summer on board the RRS James Clark Ross, with further winter cruises completed in collaboration with the Nansen Legacy project on board the RV Helmer Hanssen. Shipboard data collection included the deployment of conductivity-temperature-depth (CTD) packages, ocean seagliders, mulitcorers, grabs, nets, trawls, and a shelf underwater camera system. The CAO programme aims to understand the changes in Arctic marine ecosystem in a quantifiable way, enabling computer models to help predict the consequences of these changes on, for example; surface ocean productivity; species distributions; food webs; and ecosystems, and the services they provide (ecosystem services). It was initially a Natural Environment Research Council (NERC) funded programme comprising four projects: Arctic PRIZE (Arctic productivity in the seasonal ice zone), led by Finlo Cottier (Scottish Association for Marine Science - SAMS); ARISE (Can we detect changes in Arctic ecosystems?), led by Claire Mahaffey (University of Liverpool); ChAOS (The Changing Arctic Ocean Seafloor), led by Christian Maerz (University of Leeds) and DIAPOD (Mechanistic understanding of the role of diatoms in the success of the Arctic Calanus complex and implications for a warmer Arctic), led by David Pond (University of Stirling). Additional projects were added to the programme in July 2018 through funding provided by NERC and the German Federal Ministry of Education and Research (BMBF). The majority of data are held by the British Oceanographic Data Centre (BODC) but a proportion of the data, primarily biological, are stored at the British Antarctic Survey Polar Data Centre ( and any BMBF funded data are held by Pangaea (

OriginatorsScottish Association for Marine Science
University of Leeds, School of Earth and Environment
University of Liverpool, School of Environmental Sciences
University of Stirling, Institute of Aquaculture
Data web site
OrganisationBritish Oceanographic Data Centre
ContactPolly Hadžiabdić (Head of the BODC Requests Team)

British Oceanographic Data Centre
Joseph Proudman Building 6 Brownlow Street
L3 5DA
United Kingdom
Collating centreBritish Oceanographic Data Centre
Local identifier1048CAO dataset
Global identifier6777
Last revised2021-04-21