Title Raw underway Thermosalinograph (TSG) observations from the SA Agulhas II Voyage 042, April 2020
Project Marion Island Relief Voyage
Authors

Leon Jacobs
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientific Technician 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, LJacobs@environment.gov.za

Marcel van den Berg
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientific Technician 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, mvdberg@environment.gov.za

Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, tlamont@environment.gov.za

Publisher Department of Forestry, Fisheries and the Environment (2021)
Contributors

Contact Person: Leon Jacobs
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientific Technician 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, leon5134@gmail.com

Abstract 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 10-second resolution raw TSG data collected, between 21 April 2020 and 15 May 2020, during Voyage 042 on the SA Agulhas II.
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. The software was set to record data at 10 second intervals for the duration of the cruise, between 21 April 2020 and 15 May 2020. 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, and in the Southern Ocean.
Data
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Temporal extent 21 Apr 2020 – 15 May 2020
Geographic extent

Benguela Current Large Marine Ecosystem (BCLME) region, west and south coasts of South Africa, Southern Ocean

North: -33.0
South: -50.0
West: 17.0
East: 39.0

Vertical extent Max: -7.0 m
Min: -7.0 m
Keywords AGU042, conductivity, INDIAN OCEAN, near-surface, SA Agulhas II, SA Agulhas II 042, salinity, SBE45, temperature, THERMOSALINOGRAPH, TSG, underway
Related resources
  • This digital object is part of Marion Island Relief Voyage on the SA Agulhas II Voyage 042, April 2020 (10.15493/dea.mims.26052160)