Processed underway Thermosalinograph (TSG) observations from SA Agulhas II Voyage 029, December 2017 ...

• Main Authors: Leon Jacobs, Marcel van den Berg, Tarron Lamont
• Format: Dataset
• Language: English
• Published: Department of Forestry, Fisheries and the Environment 2021
• Subjects: -7.0; m; Mean sea level; completed; license; oceans; South African National Antarctic Expedition SANAE; SOUTHERN OCEAN; THERMOSALINOGRAPH; SBE45; Thermosalinograph; TSG; near-surface; temperature; conductivity; salinity; underway; SA Agulhas II; SA Agulhas II 029; AGU029; WGS 84; textTable; Antarctic; SANAE; Southern Ocean; Antarc*; South Atlantic Ocean
• Online Access: https://dx.doi.org/10.15493/dea.mims.25010004; https://api.odp.saeon.ac.za/catalog/MIMS/go/10.15493/dea.mims.25010004

A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C). Here we present the 6-second resolution processed TSG data collected, between 08 December 2017 and 13 February 2018, during Voyage 029 on the SA Agulhas II. ... : The SeaBird SBE45 Thermosalinograph (TSG) is used on the SA Agulhas II for the collection of underway near-surface temperature and conductivity measurements. The underway seawater is obtained from a depth of 7m below the surface and pumped through the TSG. Data is collected using the most recent SeaBird (SBE) SeaSave software and processed using the most recent SBE Data Processing Software. The software was set to record data at 6 second intervals for the duration of the cruise, between 08 December 2017 and 13 February 2018. Data was collected in the southern part of the Benguela Current Large Marine Ecosystem (BCLME) region, on the west and south coasts of South Africa, in the eastern part of the South Atlantic Ocean, and in the Southern Ocean. Unreliable TSG measurements can result from a variety of problems encountered during the cruises, including insufficient water flow, extreme air bubbling during severly adverse weather conditions, debris trapped in the system, or a variety of electronic failures. ...