Name: Preliminary processed CTD continuous observations from the Algoa Voyage 235, February 2017
License: https://creativecommons.org/licenses/by-sa/4.0/

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Title	Preliminary processed CTD continuous observations from the Algoa Voyage 235, February 2017
Project	Integrated Ecosystem Programme: Southern Benguela (IEP: SB)
Authors	Gavin Tutt 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, Gtutt@environment.gov.za
Publisher	Department of Forestry, Fisheries and the Environment (2021)
Contributors	Contact Person: Gavin Tutt 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, gtsglider@gmail.com
Abstract	SeaBird CTD Conductivity-Temperature-Depth (CTD) instruments were used to measure pressure, temperature and conductivity through the water column. During some cruises additional instruments for oxygen, fluorescence, Photosynthetically Available Radiation (PAR), Surface PAR (SPAR), turbidity, beam attenuation, beam transmission measurements were connected to the CTD unit. Here we present preliminary processed downcast CTD continuous data collected between 18 February 2017 and 25 February 2017, during Voyage 235 on the Algoa, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of South Africa. This data was collected as part of the Intergrated Ecosystem Programme: Southern Benguela (IEP:SB), which has been conducting multi-disciplinary long-term monitoring along the Kleinsee, Namaqualand, Elands/St Helena Bay and Scarborough transects off the west coast of South Africa since 2013.
Methods	Since 2000, SeaBird Conductivity-Temperature-Depth (CTD) instruments have been used to measure pressure, temperature and conductivity through the water column during research and monitoring cruises. During some cruises, additional instruments for oxygen, fluorescence, Photosynthetically Available Radiation (PAR), Surface PAR (SPAR), turbidity, beam attenuation, beam transmission measurements were connected to the CTD unit. Here we present preliminary processed downcast CTD profile data collected between 18 and 25 February 2017, during Voyage 235 on the Algoa. Temperature is presented on the ITS-90 scale, and salinity was computed from conductivity measurements on the 1978 Practical Salinity Scale, according to UNESCO (1991) algorithms. Minimal quality control procedures were applied to the data to remove obvious erroneous values resulting from problems including electronic spikes, data collection in air, inadequate flow through the conductivity cell, among others. Data has not been verified and no additional calibrations or corrections have been applied as yet.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) 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	18 Feb 2017 – 25 Feb 2017
Geographic extent	Benguela Current Large Marine Ecosystem (BLMCE), west coast of South Africa North: -29.0 South: -35.0 West: 14.0 East: 19.5
Vertical extent	Max: -1.0 m Min: -1029.0 m
Keywords	Beam Attenuation, Beam Transmission, conductivity, continuous, CTD, Density, Fluorometer, Oxygen, PAR, Photosynthetically Available Radiation, pressure, salinity, SeaBird CTD, Sound Velocity, SOUTH ATLANTIC OCEAN, SPAR, Surface PAR, temperature, Turbidity
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 Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 235, February 2017 (10.15493/dea.mims.26052250)

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