Data aggregation and products generation in the Norwegian and Barents Seas Ann Kristin Østrem Institute of Marine Research, Norway

Definition of the region MSFD regions not defined in this area Use ICES Ecoregions instead Included the Arctic Ocean, Greenland Sea and Icelandic Waters 4/6/2019 Annual meeting, Roskilde, 6-7 February 2018

Data overview – unrestricted data 258839 profiles from 7 partners Most data in Norwegian Sea, western Barents Sea, south/west of Iceland Data outside the defined region (ferrybox?) – also included in the North Sea region? Partner (EDMO) Profiles IMR (612) 25182 RIHMI-WDC (681) 11897 IFREMER (486) 2856 ICES (730) 1413 BODC (43) 212229 PANGAEA (3234) 233 DOD (96) 17 Total 258839 4/6/2019 Annual meeting, Roskilde, 6-7 February 2018

Annual meeting, Roskilde, 6-7 February 2018 Data overview - Oxygen Only data in one year in Fram Strait? -> glider data Will this be a problem in DIVA? Oxygen data 1950-2016; almost no data in the Barents Sea Oxygen (all data): Oxygen (without glider): 4/6/2019 Annual meeting, Roskilde, 6-7 February 2018

Variables in data set (P35) Measuring area type: Curve (ferrybox, glider), Point (other data) Variable Point Curve Phosphate 34986 Silicate 31339 Nitrate 26296 Nitrite 25346 Chlorophyll-a 20768 46301 Dissolved oxygen 19603 169511 Phaeopigments 18277 Salinity 17277 215799 Temperature 17260 215812 Variable Point pH 2033 Dissolved oxygen saturation 346 Total alkalinity 312 Nitrate plus nitrite 311 Dissolved inorganic carbon 105 Particulate organic carbon 40 Ammonium 37 Total phosphorus 34 Particulate nitrogen 26 Left table: Enough data to make DIVA products Almost no data for ammonium, nitrate+nitrite, totalP, totalN - can not make the same products as the other regions 4/6/2019 Annual meeting, Roskilde, 6-7 February 2018

Data examples - Nitrate Most of the data in standard sections and along the Norwegian coast Time period: 1980-2016 Not much data in winter November-December: Norwegian fjords Nitrate and nitrite separately in most of the region Icelandic Waters, southeast Greenland: Nitrate+nitrite 4/6/2019 Annual meeting, Roskilde, 6-7 February 2018

Annual meeting, Roskilde, 6-7 February 2018 QC - Nitrate Negative values, mostly in CTD data Stations with all data close to 0 – wrong units? Default values (missing data): -9.98, 0 ? Missing comma: 305 -> 3.05 4/6/2019 Annual meeting, Roskilde, 6-7 February 2018

Data examples - Phosphate Data covering the whole region, also in south-west Data from a longer period: 1966-2016 QC issues mostly the same as for nitrate Many of the same problems as for nitrate. Longer time period: 1966-2016. 4/6/2019 Annual meeting, Roskilde, 6-7 February 2018