| Title | Raw underway Thermosalinograph (TSG) observations from the Marion Island Relief Voyage on the SA Agulhas II Voyage 011, April 2014 |
|---|---|
| Project | Marion Island Relief Voyage |
| Authors |
Jacobs, Leon van den Berg, Marcel Lamont, Tarron |
| Publisher | Department of Forestry, Fisheries and the Environment (2025) |
| Contributors |
Contact Person: van den Berg, Marcel |
| Abstract | Here we present the 6-second resolution raw TSG data collected between 02 April 2014 and 06 May 2014, during Voyage 011 on the SA Agulhas II. 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). |
| Methods | 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 Dataprocessing software. The software was set to record data at 6 second intervals for the duration of the cruise, between 02 April 2014 and 06 May 2014. Data was collected in the southern part of the Benguela Current Large Marine Ecosystem (BCLME) region; the Agulhas Current Large Marine Ecosystem (ACLME) and Southern Ocean. Unreliable TSG measurements can result from a variety of problems encountered during the cruises, including insufficient water flow, extreme air bubbling during severely adverse weather conditions, debris trapped in the system, or a variety of electronic failures. Detailed visual inspection of the ship trajectory and TSG measurements, as well as comparisons with other concurrent and historical near-surface measurements, and expert knowledge of local conditions, were used to identify and remove all unreliable data. |
| Data | |
| Temporal extent | 02 Apr 2014 – 06 May 2014 |
| Geographic extent |
Benguela Current Large Marine Ecosystem (BLMCE); Agulhas Current Large Marine Ecosystem (ACLME) & Southern Ocean
North: -32.0 |
| Vertical extent |
Max: -7.0 m Min: -7.0 m |
| Keywords | EOV: Physics > Sea surface salinity , EOV: Physics > Sea surface temperature , SA Agulhas II , SA Agulhas II 011 , SDG Goal 14. Conserve and sustainably use the oceans, seas and marine resources for sustainable development , SOUTH ATLANTIC OCEAN , SOUTHERN OCEAN , THERMOSALINOGRAPH , TSG |
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