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Title Processed CTD discrete observations from the West Coast Demersal Survey on the Africana Voyage 133, January 1996
Authors

Makhetha, Mbulelo
Department of Forestry, Fisheries and the Environment

Tutt, Gavin
Department of Forestry, Fisheries and the Environment

Lamont, Tarron
Department of Forestry, Fisheries and the Environment

Publisher Department of Forestry, Fisheries and the Environment (2026)
Contributors

Contact Person: Tutt, Gavin
Department of Forestry, Fisheries and the Environment, email: Gtutt@dffe.gov.za

Abstract Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the downcast collected between 13 January and 19 February 1996, during voyage 133 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa. Neil Brown MK3 and MK4 CTD instruments were used to measure pressure, temperature and conductivity through the water column during research and monitoring cruises between 1983 and 2000.
Methods Temperature was converted from the IPTS-68 scale to the ITS-90 scale, and salinity was computed from conductivity measurements on the 1978 Practical Salinity Scale, according to UNESCO (1991) algorithms. UNESCO (1993) quality control procedures were applied to the data, and obvious erroneous values resulting from problems including electronic spikes, data collection in air, and inadequate flow through the conductivity cell were removed. Any additional calibrations or corrections have been specified in each data file, where applicable and available.
Data
Attribution-ShareAlike 4.0 International
Temporal extent 13 Jan 1996 – 19 Feb 1996
Geographic extent

Benguela Current Large Marine Ecosystem

North: -28.5
South: -36.0
West: 14.5
East: 20.0

Keywords CTD , Data status: completed , OCEAN PRESSURE , OCEAN TEMPERATURE , OCEANS , SOUTH ATLANTIC OCEAN , Subsurface temperature , textTable , West Coast Demersal Biomass Survey , WGS84
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