https://doi.org/10.21334/npolar.2022.dadccf78 https://ipt.gbif.no/resource?r=aen-q3-ice-algae Philipp Assmy Norwegian Polar Institute Reseacher

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0000-0002-8241-7541 Rolf Gradinger UiT The Arctic University of Norway Reseacher

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0000-0001-6035-3957 Bente Edvardsen University of Oslo Reseacher

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0000-0002-6806-4807 Jozef Wiktor Institute of Oceanology Polish Academy of Sciences Researcher

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0000-0002-3468-0513 Agnieszka Tatarek Institute of Oceanology Polish Academy of Sciences Reseacher

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0000-0003-1467-6362 Lucie Gorageur Norwegian Polar Institute Researcher

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0000-0001-9354-9024 Anette Wold Norwegian Polar Institute Reseacher

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anette.wold@npolar.no 0000-0002-3997-1205 Anette Wold Norwegian Polar Institute Reseacher

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anette.wold@npolar.no 0000-0002-3997-1205 pointOfContact 2022-12-19 eng The data was collected during the Nansen Legacy Seasonal Study Q3 from 5 - 27 August 2019 on research vessel RV Kronprins Haakon (cruise number 2019706), along a transect in the northern Barents Sea from 76N to 82N. The dataset contains an abundance of ice algae protists, including phytoplankton (autotrophic) and protozooplankton (heterotrophic). Protists were identified and counted with light microscopy using the Utermöhl method and the result are given as cells per liter (cells/L). protist; ice algae; protozooplankton; abundance; ice station; Northern Barents Sea GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. The Northern Barents Sea 29 35 82 76 2019-08-05 2019-08-27 unkown Philipp Assmy Norwegian Polar Institute Reseacher

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0000-0002-8241-7541 Anette Wold Norwegian Polar Institute Reseacher

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0000-0002-3997-1205 All samples have been analysed at the Institute of Oceanology of the Polish Academy of Sciences (IOPAN). The organisms were identified and counted under an inverted microscope according to the Utermöhl method. The sampling covers a transect from the central Barents Sea (76N) to the Arctic Ocean (82N) east of Svalbard, including 7 stations (P1 to P7). The samples were collected with Kovacs ice corer 9 cm diameter (Kovacs Enterprise). The samples were collected from the bottom part of the ice core at the following dept layers: 0-3 cm, 3-10 cm, 10-20 cm & 20-30 cm. The ice cores were transferred to a clean bucket and 100mL filtered sea water were added per 1 cm of sea ice and melted at 4°C. When the ice core was melted, 95 mL of the sample was transferred into 100 ml brown glass bottle. The samples were preserved using an aldehyde mixture of glutaraldehyde and hexamethylenetetramine-buffered formalin at final concentrations of 0.1% and 1% respectively. 2022-12-13T13:50:39.680+00:00 dataset https://ipt.gbif.no/resource?id=aen-q3-ice-algae/v1.2.xml