Temperature, salinity and current velocity data from two oceanographic moorings in the South Sandwich Trench

This dataset consists of year-long time series of calibrated data from two moorings deployed in the South Sandwich Trench between February 2024 and February 2025. The central mooring was situated at 60°12.85' S, 25°07.36' W and included nine instruments at depths between approximately 1450 m and 5950 m. Each file contains the data from a single instrument, either an Aquadopp current meter (current velocity), RBR temperature sensor (temperature), or Microcat CTD (temperature, salinity). The files from the central mooring are: SouthSandwichCentral_CurrentMeter_1030m.nc SouthSandwichCentral_Temperature_Salinity_1030m.nc SouthSandwichCentral_Temperature_1830m.nc SouthSandwichCentral_CurrentMeter_2630m.nc SouthSandwichCentral_Temperature_3460m.nc SouthSandwichCentral_CurrentMeter_4280m.nc SouthSandwichCentral_Temperature_5100m.nc SouthSandwichCentral_CurrentMeter_5910m.nc SouthSandwichCentral_Temperature_Salinity_5910m.nc Due to issues with the lengths of the rope used for the mooring, the nominal depths are only known for those instruments with a pressure sensor (the Aquadopps and the Microcat CTDs). The nominal depth of the temperature sensors are an estimate only, calculated as the midpoint between the two surrounding instruments with a pressure sensor. Also included is a time series of temperature and current speed from a second mooring on the western side of the trench, at a location of 60°06.49' S, 25°18.54' W. While this mooring was not fully recovered, a temperature sensor and Acoustic Current Doppler Profiler (ADCP) were recovered that were at/near the seafloor for the entire deployment, at a depth of approximately 3960 m. The data current meter data includes only the absolute current speed, not the individual velocity components. The files from the western mooring are: SouthSandwichWest_CurrentMeter_3957m.nc SouthSandwichWest_Temperature_3957m.nc