Title Processed CTD data from Leg 1 of the African Coelacanth Ecosystem Programme (ACEP) II on the Algoa Voyage 177, July 2010
Project African Coelacanth Ecosystem Programme (ACEP)
Authors

Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, tarron.lamont@gmail.com

Publisher Department of Forestry, Fisheries and the Environment (2022)
Contributors

Contact Person: Tarron Lamont
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, tarron.lamont@gmail.com

Project Member: Gavin Tutt
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Scientific Technician 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, gtutt@environment.gov.za

Abstract The Algoa sailed from Durban on 16 July 2010 to conduct a hydrographic survey of the Natal Bight as part of the winter African Coelacanth Ecosystem Programme (ACEP) II. A total of 16 shore-normal transects were occupied between Scottburgh and St. Lucia. The aim of the synoptic survey was to determine the nutrient sources of the Natal Bight ecosystem, and to characterise the focus sites across the Bight. This dataset was processed using older standards which may not align with international best practices and the standards currently adhered to by the Department of Forestry, Fisheries and the Environment (DFFE). The Department is re-processing and replacing data to ensure everything has the same format and is of the same quality and datasets will be marked as obsoleted once that is done. As such the user assumes the entire risk related to the use of these data in its current state and format. DFFE disclaims all warranties of the data whether expressed or implied, including without limitation, any warranties of merchantability or fitness for a particular purpose. For any concerns regarding the data, the user may decide to liaise with the listed PIs who will share their insight on the data quality, where possible. It is also strongly recommended that the user liaises with the listed PIs regarding their proposed projects to mitigate against duplication of research efforts.
Methods The CTD raw data was converted to scientific units using SBEDataProcessing software (ver 7.26.7.114). The following modules (SBEDataProcessing) were then run on the converted data using the recommended default values: Align CTD, Filter, Loop Edit and Cell Thermal Mass. The data was then split into the up cast and the down cast. The down cast data was then bin averaged on pressure - 1db. This was then imported into MS-Excel together with the casts metadata. Some quality control was then performed using the Ocean Data View software to identify outliers in the data. These outliers were then removed from both the .CNV files created by the SeaBird software and the Excel spreadsheet.
Data
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Temporal extent 21 Jul 2010 – 28 Jul 2010
Geographic extent

Natal Bight

North: -28.52
South: -30.453
West: 30.779
East: 32.655

Keywords Algoa, Algoa 177, Conductivity, CTD, Depth, INDIAN OCEAN, Temperature
Related resources
  • This digital object is part of Leg 1 of the African Coelacanth Ecosystem Programme (ACEP) II on the Algoa Voyage 177, July 2010 (10.15493/dea.mims.26052246)