Salinity profiles of sea ice and snow on sea ice were measured in the Arctic Ocean during the Norwegian Young Sea Ice cruise in 2015 (https://www.npolar.no/en/projects/n-ice2015/), an international sea ice drift expedition led by the Norwegian Polar Institute. Salinity is a key parameter for a range of processes related to biology, photochemistry and physics of sea ice, snow on sea ice as well as atmospheric aerosol. Sea ice cores and snow samples were collected during the sea ice drift expedition from the ice floe and transferred to the ship''s laboratory. The aqueous conductivity of melted sea ice core and snow samples was measured and converted into practical salinity units. Funding was provided by the NERC grant NE/M005852/1, Japan Society for the Promotion of Science (15K16135, 24-4175) and the Centre of Ice, Climate and Ecosystems (ICE) at the Norwegian Polar Institute through the N-ICE project

Datasets from a deep sediment trap (3200m) mooring deployed in the Southern Ocean, south-west of South Georgia in April 2007 during the marine cruise JR167 and recovered in January 2008 by the marine cruise JR177.

Datasets from a deep water mooring deployed in the Southern Ocean, north of South Georgia in March 2004 during the marine cruise JR100 and recovered in November 2004 by the marine cruise JR107.

Datasets from a deep water mooring deployed in the Southern Ocean, north of South Georgia in January 2006 during the marine cruise JR140 and recovered in April 2006 by the marine cruise JR146.

Datasets from a deep sediment trap (3700m) mooring deployed in the Southern Ocean, north-west of South Georgia in November 2006 during the marine cruise JR161 and recovered in January 2008 by the marine cruise JR177.

Datasets from a shallow water mooring deployed in the Southern Ocean, north of South Georgia in April 2003 during the marine cruise JR87 and recovered in November 2003 by the marine cruise JR92.

Datasets from a deep water mooring deployed in the Southern Ocean, north of South Georgia in April 2005 during the marine cruise JR121 and recovered in December 2005 by the marine cruise JR140.

Datasets from a shallow water mooring deployed in the Southern Ocean, north of South Georgia in January 2004 during the marine cruise JR96 and recovered in March 2004 by the marine cruise JR100.

Datasets from a deep water mooring deployed in the Southern Ocean, north of South Georgia in April 2006 during the marine cruise JR146. The mooring came up in August 2006 and was retrieved by the marine cruise JR159.

Datasets from a deep sediment trap (3200m) mooring deployed in the Southern Ocean, south-west of South Georgia in January 2012 during the marine cruise JR260b and recovered in November 2012 by the marine cruise JR280.