The Nansen Legacy cruise Q4 (Q4: 4th quarter of the year) was the second of in total four seasonal cruises to the northern Barents Sea and adjacent Arctic Basin. The cruise focused on comparing the state of the physical, chemical and biological conditions along the Nansen Legacy main transect in open waters and within the sea ice, addressing objectives of the work packages Physical drivers (Research Foci 1), Human impact (Research Foci2), The living Barents Sea (Research Foci 3), and Technology and method development (Research Activity C). These data are created from the CTD data published by NMDC for the whole cruise (https://doi.org/10.21335/NMDC-301551919). The values have not be changed.