Title Long-term observations of daily currents on the Prince Edward Island shelf at Mooring 2 (May 2022 - April 2023)
Project South Atlantic Meridional Overturning Circulation (SAMOC-SA)
Authors

Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientist; contact details: email: tlamont@dffe.gov.za

Marcel van den Berg
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: mvdberg@dffe.gov.za

Publisher Department of Forestry, Fisheries and the Environment (2023)
Contributors

Contact Person: Marcel van den Berg
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: mvandenberg.dea@gmail.com

Abstract Here we present processed magnitude and direction of daily currents throughout the water column (45.2 - 245.2m) from an Acoustic Doppler Current Profiler (ADCP) at location M2 (46.713°S; 37.902°E) on the Prince Edward Island shelf, between 07 May 2022 and 25 April 2023. The South African component of the international South Atlantic Meridional Overturning Circulation project (SAMOC-SA) aims to characterise the time-mean and time-varying components of the SAMOC in the South Atlantic Ocean and monitor the variability of the main Southern Ocean frontal systems associated with the Antarctic Circumpolar Current (ACC), south of Africa.
Methods A bottom-mounted, upward-looking, 150 kHz RD Instruments Acoustic Doppler Current Profiler (ADCP) was configured with a bin size of 8m and a blanking distance of 3.52m, and deployed at location M2 (46.713°S; 37.902°E), on the shelf between Marion Island and Prince Edward Island. The instrument measured hourly magnitude and direction throughout the water column (45.2 - 245.2m) between 07 May 2022 and 25 April 2023. These hourly values were corrected for magnetic declination, and then averaged to daily means for each depth bin. Only hourly values which showed ≥ 75% good beam data were used, and daily values were only generated for days on which there were 75% or more hourly readings.
Data
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Temporal extent 07 May 2022 – 25 Apr 2023
Geographic extent

Prince Edward Islands, South Africa

North: -46.713
South: -46.714
West: 37.902
East: 37.903

Vertical extent Max: -245.2 m
Min: -45.2 m
Keywords Acoustic Doppler Current Profilers, ADCP, currents, INDIAN OCEAN, moorings, SOUTHERN OCEAN
Related resources
  • This digital object continues Long-term observations of daily currents on the Prince Edward Island shelf at Mooring 2 (April 2021 - May 2022) (10.15493/DEA.MIMS.11062023)
  • This digital object is new version of Raw ADCP Data for long-term observations of currents on the Prince Edward Island shelf at Mooring 2 (May 2022 - April 2023) (10.15493/DEA.MIMS.11132023)
  • This digital object is part of Long-term moored observations at the Prince Edward Island archipelago (10.15493/DEA.MIMS.26052019)