Title Long-term observations of daily currents on the Prince Edward Island shelf at M1 (May 2023 - April 2024)
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 (2024)
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 The South African component of the international South Atlantic Meridional Overturning Circulation project (SAMOC-SA) aims to characterize 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. Here we present processed magnitude and direction of daily currents throughout the water column (20.71m - 148.71m) from an Acoustic Doppler Current Profiler (ADCP) at location M1 (46.772°S; 37.899°E) on the Prince Edward Island shelf, between 01 May 2023 and 24 April 2024.
Methods A bottom-mounted, upward-looking, 150kHz 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 M1 (46.772°S; 37.899°E), on the shelf between Marion Island and Prince Edward Island. The instrument measured hourly magnitude and direction throughout the water column (20.71 - 148.71m) between 01 May 2023 and 24 April 2024. 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 01 May 2023 – 24 Apr 2024
Geographic extent

Prince Edward Islands, South Africa

North: -44.6
South: -48.6
West: 35.0
East: 41.0

Vertical extent Max: -148.71 m
Min: -20.71 m
Keywords Acoustic Doppler Current Profilers, ADCP, currents, INDIAN OCEAN, moorings, SOUTHERN OCEAN, temperature
Related resources
  • This digital object continues Long-term observations of daily currents on the Prince Edward Island shelf at Mooring 1 (May 2022 - April 2023) (10.15493/DEA.MIMS.11142023)
  • This digital object is new version of Raw ADCP Data for long-term observations of currents on the Prince Edward Island shelf at M1 (May 2023 - April 2024) (10.15493/DEA.MIMS.15302024)
  • This digital object is part of Long-term moored observations at the Prince Edward Island archipelago (10.15493/DEA.MIMS.26052019)