Name: Short-term observations of daily currents on the continental shelf and slope off Port Edward, along the east coast of South Africa at location P4 (July 2011 - October 2011)
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/dea.mims.26052112

Title	Short-term observations of daily currents on the continental shelf and slope off Port Edward, along the east coast of South Africa at location P4 (July 2011 - October 2011)
Project	Shelf Circulation Patterns off Port Edward
Authors	Gavin Louw Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientific Technician 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, glouw@environment.gov.za Marcel van den Berg Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientific Technician 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, mvdberg@environment.gov.za Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, tlamont@environment.gov.za
Publisher	Department of Forestry, Fisheries and the Environment (2020)
Contributors	Contact Person: Gavin Louw Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientific Technician 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, mrgavinl@gmail.com
Abstract	Between 2005 and 2015, multiple short-term studies were conducted to determine the characteristics of moorings deployed in a region heavily influenced by the strong Agulhas Current, and to examine circulation patterns across the continental shelf and slope off Port Edward, along the east coast of South Africa. Three moorings (P1, P2, and P3) were deployed, just south of Port Edward at depths of 36m, 64m, and 162m, respectively, between September 2005 and September 2006, to measure currents and bottom temperatures across the inner shelf. A further three moorings (P4, P5, and P6) were deployed off Port Edward over the period September 2010 to June 2015, at depths of 217m, 1060m, and 2000m, to measure currents and sub-surface temperatures across the outer shelf and slope. Here we present processed magnitude and direction of daily currents throughout the water column (21.0 - 201.0 m) from an ADCP at location P4 (31.1095°S; 30.3072°E) on the outer shelf and slope off Port Edward, between 22 July 2011 and 07 October 2011.
Methods	A sub-surface, upward-looking, 150 kHz RD Instruments Acoustic Doppler Current Profiler (ADCP) was configured with a bin size of 5 m and a blanking distance of 3.5 m, and deployed at location P4 (31.1095°S; 30.3072°E), on the outer shelf and slope of Port Edward, along the east coast of South Africa. The instrument measured hourly magnitude and direction throughout the water column (21.0 - 201.0 m) between 22 July 2011 and 07 October 2011. 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) Cite 10.15493/dea.mims.26052112 Style Terms of use These data are made available with the express understanding that any such use will properly acknowledge the originator(s) and publisher and cite the accession numbers and/or associated Digital Object Identifiers. Anyone wishing to use these data should properly cite and attribute the data providers listed as authors in the metadata provided with each dataset. It is expected that all the conditions of the data license will be strictly honoured. Use of any material herein should be properly cited using the dataset’s persistent identifiers such as accession numbers and DOIs. I agree to the terms of use
Temporal extent	22 Jul 2011 – 07 Oct 2011
Geographic extent	Port Edward, South Africa Lat: -31.1095 Lon: 30.3072
Vertical extent	Max: -21.0 m Min: -201.0 m
Keywords	ADCP, continental shelf, continental slope, currents, INDIAN OCEAN, moorings, Port Edward, velocity
Related resources	This digital object is part of Short-term observations of currents and sub-surface temperatures on the continental shelf and slope off Port Edward, along the east coast of South Africa (10.15493/dea.mims.26052103)

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