| Title | Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP: SB) cruise on the Algoa Voyage 288, December 2022 |
|---|---|
| Project | Integrated Ecosystem Programme: Southern Benguela (IEP: SB) |
| Authors |
Frantz, Franklin Anders, Darrel 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 processed TSG data collected between 05 December 2022 and 09 December 2022, during Voyage 288 on the Algoa. 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 Algoa for the collection of underway near-surface temperature and conductivity measurements. The underway seawater is obtained from a depth of 5m 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 05 December 2022 and 09 December 2022. Data was collected in the southern part of the Benguela Current Large Marine Ecosystem (BCLME) region. 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 | 05 Dec 2022 – 09 Dec 2022 |
| Geographic extent |
Benguela Current Large Marine Ecosystem (BLMCE) and shelf region on the west coast of South Africa
North: -30.0 |
| Vertical extent |
Max: -5.0 m Min: -5.0 m |
| Keywords | Algoa , Algoa 288 , EOV: Physics > Sea surface salinity , EOV: Physics > Sea surface temperature , SDG Goal 14. Conserve and sustainably use the oceans, seas and marine resources for sustainable development , SOUTH ATLANTIC OCEAN , THERMOSALINOGRAPH , TSG |
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