Title Short-term observations of daily currents on the continental shelf off Port St Johns, along the east coast of South Africa (July 2013 - December 2013)
Authors

Gavin Louw
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientific Technician; contact details: email: glouw@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

Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Marine Scientist; contact details: email: tlamont@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 Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 95 m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns, on the east coast of South Africa. Here we present processed magnitude and direction of daily currents throughout the water column (2 - 86 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the inner shelf off Port St Johns, between July 2013 and December 2013.
Methods A bottom-mounted, upward-looking, 300 kHz RD Instruments Acoustic Doppler Current Profiler (ADCP) was configured with a bin size of 2 m and a blanking distance of 1.76 m, and deployed at location PJ (31.73°S; 29.51°E), on the shelf off Port St Johns. The instrument measured hourly magnitude and direction throughout the water column (4.24 - 90.24 m) between 03 December 2013 and 25 September 2014. These hourly values were corrected for magnetic declination. 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 02 Jul 2013 – 03 Dec 2013
Geographic extent

Port St Johns, South Africa

North: -30.0
South: -32.0
West: 29.0
East: 30.0

Vertical extent Max: -86 m
Min: -2 m
Keywords Acoustic Doppler Current Profilers, ADCP, currents, INDIAN OCEAN, moorings, temperature
Related resources
  • This digital object is new version of Raw ADCP Data for short-term observations of currents on the continental shelf off Port St Johns, along the east coast of South Africa (July 2013 - December 2013) (10.15493/DEA.MIMS.38112024)
  • This digital object is part of Short-term observations of currents and sub-surface temperatures on the continental shelf off Port St Johns, along the east coast of South Africa (10.15493/DEA.MIMS.29112024)