Conductivity, Temperature, Pressure (CTD) measurements from moorings taken in the Eurasian and Makarov Basins, Arctic Ocean, 2021-2023

Eight long-term moorings were deployed in the Eurasian and Makarov Basins of the Arctic Ocean during the Nansen and Amundsen Basins Observational System (NABOS) 2021 cruise. They were successfully recovered in September 2023. The primary goal of the mooring Conductivity, Temperature, Pressure (CTD) observations was to understand the role of stratification in controlling the transport of heat and other properties of Atlantic Water to the upper ocean and ice. The primary objectives included quantifying the structure and temporal variability of the main water masses, as well as obtaining detailed information about upper ocean, halocline, Atlantic Water (AW) layer dynamics, and seasonal variations. This dataset contains separate text files with outputs from each SBE-37, SBE-56, and RBR CTD instrument at eight moorings. All data files include a one-row header with titles for all data columns. Processing of the SBE-37, SBE-56, and RBR CTD records utilized standard data processing packages provided by vendors. Some instrument records required corrections of salinity to remove vertical instabilities with other instruments and spikes. Each data row in the SBE-37 and RBR CTD data files includes observations of in-situ temperature, conductivity, pressure, salinity, and date/time stamp, which contain day, month, year, hour, minutes, and seconds of measurements. The SBE-56 data files include observations of in-situ temperature, pressure, and date/time stamp. All instruments used Greenwich Mean Time (GMT) for this timestamp.