Title | Short-term observations of daily currents on the continental shelf off Port St Johns, along the east coast of South Africa (December 2013 - September 2014) |
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Authors |
Gavin Louw Marcel van den Berg Tarron Lamont |
Publisher | Department of Forestry, Fisheries and the Environment (2024) |
Contributors |
Contact Person: Marcel van den Berg |
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 daily 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 inner 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, and daily values were only generated for days on which there were 75% or more hourly readings. |
Data | |
Temporal extent | 03 Dec 2013 – 25 Sep 2014 |
Geographic extent |
Port St Johns, South Africa
North: -30.0 |
Vertical extent |
Max: -90.24 m Min: -4.24 m |
Keywords | Acoustic Doppler Current Profilers, ADCP, currents, INDIAN OCEAN, moorings, temperature |
Related resources |
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