This dataset is based on acoustic recordings from five moorings deployed during the UNDER-ICE experiment in the Fram Strait. The UI1 mooring carried 8 hydrophones: HM501 (467m), HM502 (476m), HM504 (494m), HM505 (503m), HM506 (512m), HM507 (521m), HM509 (530m), HM310 (539m). A total of 8188 recordings were obtained from each hydrophone every 3 hours from Sep 2014 - Jan 2016. The UI2 mooring carried 10 hydrophones: HM511 (336m), HM512 (327m), HM513 (318m), HM514 (309m), HM515 (300m), HM516 (291m), HM517 (282m), HM518 (273m), HM519 (264m), HM320 (255m). A total of 4358 recordings were obtained from each hydrophone every 3 hours from Sep 2014 - Jan 2016. The UI3 mooring carried 10 hydrophones: HM521 (317m), HM522 (308m), HM523 (299m), HM524 (290m), HM525 (281m), HM526 (272m), HM527 (263m), HM528 (254m), HM529 (245m), HM330 (236m). A total of 8188 recordings were obtained from each hydrophone every 3 hours from Sep 2014 - Jan 2016. The UI4 mooring carried 10 hydrophones: HM531 (313m), HM532 (304m), HM533 (295m), HM534 (286m), HM535 (277m), HM536 (268m), HM537 (259m), HM538 (250m), HM539 (241m), HM340 (232). A total of 8189 recordings were obtained from each hydrophone every 3 hours from Sep 2014 - Jan 2016. The UI5 mooring carried 9 hydrophones: HM542 (565m), HM543 (556m), HM544 (547m), HM545 (538m), HM546 (529m), HM547 (520m), HM548 (511m), HM549 (502m), HM550 (493m). A total of 4359 recordings were obtained from each hydrophone every 3 hours from Sep 2014 - Mar 2016. Each acoustic recording covered 130 s with sampling rate 1000Hz. 10-, 50- and 90- percentiles of sound pressure and power were calculated for each reception using 50 % overlapping Hanning window with a window length of 1024 samples. The units for sound pressure is Pa. The unit for power (ocean sound level) is dB re uPa2 Hz-1. Noise by cable strumming is included. The processing is described in Geyer et al. 2021 https://doi.org/10.1121/2.0001507.

XBT profiles of temperature and pressure, and XCTD profiles of temperature, salinity, and pressure, collected in the Fram Strait from KV Svalbard in July 2016. The data collection also include calculated sound speed profiles provided by the instrument manufacturer. There are a total of 150 profiles and 366117 observations.

XBT profiles of temperature, pressure and XCTD profiles of temperature, pressure, salinity were collected in the Fram Strait from KV Svalbard in September 2014. The data collection also include calculated sound speed profiles provided by the instrument manufacturer. There are a total of 44 profiles and 231149 observations.

XBT data collected north of Svalbard, during the 2021 dry run with Le Commandant Charcot to the North Pole.

Time averaged sound pressure obtained from the ACOBAR acoustic experiment in Fram Strait. The data were were obtained over 362 days every 3 hours from Aug 2010 - Jul 2011, and over 311 days every 3 hours from Sep 2011 - Jul 2012. 10-, 50- and 90- percentiles of the sound pressure and power for each frequency (0-500 Hz) were computed.

Ambient sound was measured in Storfjorden, Svalbard at frequencies from 30 to 24000 Hz at a depth of around 20 meters. The measurements were carried out in open sea at depths of about 100 metres or more. The measurements were carried out using a drifting small boat, where the engine was turned off. Thereafter, a second small boat was used for transmitting pings at 11 kHz towards the first small boat at different depths and ranges. The experiment was carried out in June 2020 by Master students under supervision, as part of a research school in the Barents Sea with K/V Svalbard, organized under the UAK project lead by the Nansen Environmental and Remote Sensing Centre.

Oceanographic data (temperature, conductivity, pressure, currents) measured by instruments in a mooring placed next to a seafood farm in Stokksundet, Norway. The instruments collected data from 17 March to 28 April 2022 as part of a Master study. The data is presented in Røsvik (2022). Røsvik, Bjørnar Hallaråker, 2022. Multidisciplinary Moorings in the Arctic and Coastal Areas. Master Thesis. The University of Bergen. Available at: https://hdl.handle.net/11250/3001633 (Accessed: 22 September 2022).

Data collected with LISST-VSF in Storfjorden, Svalbard, during the UAK 2020 Research School with KV Svalbard.

Ambient sound was measured in Storfjorden, Svalbard at frequencies from 30 to 24000 Hz at depths from 4 to 20 meters. The measurements were carried out near land and melting ice bergs. The measurements were carried out using a drifting small boat, where the engine was turned off. Thereafter, a second small boat was used for transmitting pings at 11 kHz towards the first small boat at different depths and ranges. The experiment was carried out in June 2020 by Master students under supervision, as part of a research school in the Barents Sea with K/V Svalbard, organized under the UAK project lead by the Nansen Environmental and Remote Sensing Centre.

Nansen Nordic Seas Database contains data from 1870-2010. This product contains oceanographic data extracted from NNSD, gridded to a 1 degree grid with monthly-mean values at [0m,5000m) depth. Variables: temperature, alkalinity, chlorophyll, nitrate, nitrite, oxygen, ph, phosphate, salinity and silicate.