As part of the KROP - Kongsfjorden Rijpfjorden Observatory Programme UiT The Arctic University of Norway and The Scottish Association for Marine Science maintain a marine obervatory in the high-Arctic location Kongsfjorden, Svalbard, since 2002. The observatory consists of an array of CTDs, temperature loggers, ADCPs and a sediment trap, in addition to various other instruments or installations that change from year to year. This dataset cotains the temperature and salinity data of the Seabird SBE56 temperature logger that was located at 156m depth in the deployment year 2017-2018.