Title Long-term observations of daily currents along at SAMBA Mooring 8 (October 2018 - October 2020)
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: Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientist; contact details: email: tarron.lamont@gmail.com

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 in the upper part of the water column (52.49 - 425.48m) from an Acoustic Doppler Current Profiler (ADCP) located at a depth of 477m at M8 (34.4792°S; 17.3403°E) along the South Atlantic Meridional Overturning Circulation (MOC) Basin-scale Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean, between 11 October 2018 and 03 October 2020. 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 subsurface-mounted, upward-looking, 75 kHz RD Instruments Acoustic Doppler Current Profiler (ADCP) was configured with a bin size of 16m and a blanking distance of 7m, and deployed at a depth of 477m at location M8 (34.4792°S; 17.3403°E), along the South Atlantic Meridional Overturning Circulation Basin-scale Array (SAMBA) transect in the Cape Basin region of the South Atlantic Ocean. The instrument measured hourly magnitude and direction in the upper part of the water column (52.49 - 452.48m) between 11 October 2018 and 03 October 2020. 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 11 Oct 2018 – 03 Oct 2020
Geographic extent

Cape Basin, South Atlantic Ocean

North: -32.0
South: -36.0
West: 0.0
East: 19.0

Vertical extent Max: -452.48 m
Min: -52.49 m
Keywords Acoustic Doppler Current Profilers, ADCP, currents, moorings, SAMBA transect, SOUTH ATLANTIC OCEAN
Related resources
  • This digital object continues Long-term observations of daily currents along the SAMBA transect at SAMBA Mooring 8 (April 2017 - October 2018) (10.15493/DEA.MIMS.26052079)
  • This digital object is new version of Raw Acoustic Doppler Current Profiler (ADCP) data from long-term observations of currents at SAMBA Mooring 8 (October 2018 - October 2020) (10.15493/DEA.MIMS.01552023)
  • This digital object is part of Long-term moored observations from the eastern part of the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) (10.15493/DEA.MIMS.26052050)