Name: Averaged bottom temperature and dissolved oxygen in and around the Cape Canyon
License: https://creativecommons.org/licenses/by-nc-sa/4.0/

DOI: 10.15493/DEA.MIMS.05332023

Title	Averaged bottom temperature and dissolved oxygen in and around the Cape Canyon
Project	Cape Canyon Exploration
Authors	Zoleka Filander Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Scientist; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: zfilander@dffe.gov.za Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Specialist Scientist; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: tlamont@dffe.gov.za
Publisher	Department of Forestry, Fisheries and the Environment (2023)
Contributors	Project Member: Lauren Williams Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Scientist; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: lwilliams@dffe.gov.za Project Member: Gavin Tutt Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Technician; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: gtutt@dffe.gov.za Project Member: Marcel van den Berg Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Technician; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: mvdberg@dffe.gov.za Project Member: Leon Jacobs Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Technician; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: ljacobs@dffe.gov.za Project Member: Mbulelo Makhetha Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Technician; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: mmakhetha@dffe.gov.za Project Member: Gavin Louw Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Technician; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: glouw@dffe.gov.za Project Member: Baxolele Mdokwana Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Technician; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: bmdokwana@dffe.gov.za Project Member: Khaya Siswana Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Technician; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: ksiswana@dffe.gov.za Contact Person: Zoleka Filander Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Scientist; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: zfilander@dffe.gov.za
Abstract	Submarine canyons are internationally reported to enhance upwelling and heterogeneity. However, in South Africa such studies remain limited and thus a knowledge gap in regional submarine canyon dynamics still exists. To address this gap, the Department of Forestry, Fisheries and the Environment: Oceans and Coasts initiated a multi-disciplinary expedition onboard the RV Algoa (March 2016-2018) where oceanographic data, amongst other datasets, was collected within a 5x5 nautical mile distance. The benthic stations were linked to the associated mean bottom temperature and dissolved oxygen profiles.
Methods	Profiles of temperature, salinity, and dissolved oxygen were collected throughout the water column using multiple SBE911 Conductivity-Temperature-Depth (CTD) systems over a time span of three years. In 2016, the CTD grid focused on the canyon head and surrounding areas (48 stations). This grid was extended further south during the 2017 survey, yielding data from 131 stations, while in 2018 additional transects (191 stations in total) were added in the northern part of the region. All CTD casts were taken from the surface to within 5–10m of the seafloor. Dissolved oxygen concentrations (DO) of discrete seawater samples from selected depths were determined by Winkler titrations and used to calibrate the dissolved oxygen profiles. This dataset represents only the bottom temperature, salinity, and dissolved oxygen measurements which were averaged across the cruises at overlapping stations.
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.05332023 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	14 Mar 2016 – 28 Mar 2018
Geographic extent	South East Atlantic; South African West Coast; Benguela Upwelling North: -32.163 South: -33.698 West: 17.065 East: 18.283
Vertical extent	Max: -50 m Min: -1000 m
Keywords	Averaged Bottom Dissolved Oxygen, Averaged Bottom Temperature, SOUTH ATLANTIC OCEAN, Western Margin
Related resources	This digital object is referenced by https://doi.org/10.3389/fmars.2022.1025113

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