Underway temperature and salinity data was collected along the cruise track with two autonomous thermosalinograph (TSG) systems, each consisting of a SBE21 TSG together with a SBE38 Thermometer. Both systems worked independent from each other throughout the cruise. While temperature is taken at the water inlet in about 5 m depth, salinity is estimated within the interior TSG from conductivity and interior temperature. Temperature and salinity were calibrated against CTD data from 5 m depth. For details to all processing steps see Data Processing Report.

Temperature was calibrated independently for both TSGs against CTD data from 5 m depth. Value added to temperature data TSG1 = -0.012168. Value added to temperature data TSG2 = -0.005092.Salinity was calibrated independently for both TSGs against CTD data from 5 m depth (tim is the time in days since Expocode of this cruise (06M320190703), i.e. since 2019-07-03T00:00:00): Value added to salinity data TSG1 = 0.0003976tim+0.02588. A regime shift was observed for TSG2 during the cruise. Therefore, the calibration was split. Value added to TSG2 salinity data before 2019-07-19T17:58:00: 0.0009344tim+0.01213. Valued added to TSG2 salinity data from timestep 2019-07-19T17:58:00 and ongoing: 0.0019887*tim-0.03591.