Name: Processed CTD discrete observations from the South Coast Inshore Demersal Biomass and Horse Mackerel Acoustic Survey on the Africana Voyage 116, September 1993
License: https://creativecommons.org/licenses/by-sa/4.0/

DOI: 10.15493/DEA.MIMS.14952023

Title	Processed CTD discrete observations from the South Coast Inshore Demersal Biomass and Horse Mackerel Acoustic Survey on the Africana Voyage 116, September 1993
Authors	Makhetha, Mbulelo Department of Forestry, Fisheries and the Environment; role: Marine Scientific Technician; Tutt, Gavin Department of Forestry, Fisheries and the Environment; role: Marine Scientific Technician; Lamont, Tarron Department of Forestry, Fisheries and the Environment; role: Marine Scientist;
Publisher	Department of Forestry, Fisheries and the Environment (2025)
Contributors	Contact Person: Tutt, Gavin Department of Forestry, Fisheries and the Environment; role: Marine Scientific Technician; email: Gtutt@dffe.gov.za
Abstract	Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 01 September and 30 September 1993 during Voyage 116 on the FRS Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south 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	Neil Brown MK3 and MK4 Conductivity-Temperature-Depth (CTD) instruments were used to measure pressure, temperature and conductivity through the water column during research and monitoring cruises between 1983 and 2000. 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, inadequate flow through the conductivity cell, among others, have been removed. Any additional calibrations or corrections have been specified in each data file, where applicable and available.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.14952023 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	02 Sep 1993 – 28 Sep 1993
Geographic extent	100 km Leaflet Tiles © Esri — Source: Esri, DeLorme, NAVTEQ, USGS, Intermap, iPC, NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, 2012 Agulhas Large Marine Ecosystem (ACLME) North: -33.5 South: -36.8 West: 20.0 East: 27.0
Vertical extent	Max: -497 m Min: -1 m
Keywords	conductivity, CTD, depth, INDIAN OCEAN, Neil Brown CTD, temperature
Related resources	This digital object is described by https://unesdoc.unesco.org/ark:/48223/pf0000090489 This digital object is described by https://unesdoc.unesco.org/ark:/48223/pf0000138825 This digital object is part of South Coast Inshore Demersal Biomass and Horse Mackerel Acoustic Survey on the Africana Voyage 116, September 1993 (10.15493/DEA.MIMS.14892023)

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