Title Short-term observations of hourly currents on the continental shelf off Port St Johns, along the east coast of South Africa (December 2013 - September 2014)
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 90m, 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 hourly currents throughout the water column (4.24 - 90.24 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between December 2013 and September 2014.
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 (2 - 86 m) between 02 July 2013 and 03 December 2013. These hourly values were corrected for magnetic declination. Only hourly values which showed ≥ 75% good beam data were used.
Data
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Temporal extent 03 Dec 2013 – 25 Sep 2014
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 continues Short-term observations of hourly currents on the continental shelf off Port St Johns, along the east coast of South Africa (July 2013 - December 2013) (10.15493/DEA.MIMS.31112024)
  • 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 (December 2013 - September 2014) (10.15493/DEA.MIMS.39112024)
  • 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)