Please note that this is a staging site.
44 datasets found Page 2 of 2
DOI: 10.15493/DEA.MIMS.38042026
West Coast Demersal Biomass Survey on the Africana Voyage 139, January 1997

The West Coast Demersal Biomass Survey was conducted on the Africana Voyage 139 from 8 January to 30 January 1997. The objectives of the cruise were to survey, by means of trawling, the abundance of adult and recruiting hake in South African waters; to conduct routine biological and length frequency sampling of demersal species; to investigate the environmental and ecological inter-relationships of hake and other demersal species; to investigate the occurrence, distribution, reproduction and abundance of squid species; to investigate the distribution and biology of demersal species in water at depths greater than 500 m by means of demersal trawling; to sample catches of hake for sex ratios and frequency of gill parasites; to conduct demersal environmental studies including intercalibration of bottom temperature measurements with commercial trawlers, and CTD and ADCP measurements at all trawl stations and other specified stations; the collection of specimens for the South African...

DOI: 10.15493/DEA.MIMS.40042026
Processed CTD discrete observations from the West Coast Demersal Biomass Survey on the Africana Voyage 139, January 1997

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the downcast collected between 9 January and 30 January 1997, during voyage 139 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.

DOI: 10.15493/DEA.MIMS.41042026
Pelagic Pre-Recruit survey on the Africana Voyage 143, March 1997

The Pelagic Pre-Recruit Survey was conducted on the Africana Voyage 143 from 6 March to 27 March 1997. The objectives of the cruise were to profile currents by means of the Acoustic Doppler Current Profiler (ADCP); to estimate the biomass and population structure of pelagic pre-recruit fish off the West Coast by means of echo integration and midwater trawling; to investigate the extent of pelagic pre-recruit distribution and biomass index between Cape Columbine and Cape Infanta; to collect biological material for condition studies on pelagic pre-recruits; to collect ichthyoplankton samples and hydrological data along the weekly SARP line; to collect rock lobster phyllosoma and pueruli larvae for bioenergetic studies; and to collect environmental data.

DOI: 10.15493/DEA.MIMS.43042026
Processed CTD discrete observations from the Pelagic Pre-Recruit Survey on the Africana Voyage 143, March 1997

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the downcast collected between 08 March and 25 March 1997, during voyage 143 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.42042026
Processed CTD continuous observations from the Pelagic Pre-Recruit Survey on the Africana Voyage 143, March 1997

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 08 March and 25 March 1997, during voyage 143 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.15822023
Pelagic Fish Spawner Biomass Survey on the Africana Voyage 126, November 1994

The Pelagic Fish Spawner Biomass Survey was conducted on the Africana Voyage 126 from 11 November to 7 December 1994. The principal scientific tasks of this cruise were acoustic surveying whilst underway and frequent ad hoc midwater trawling on pelagic fish targets. Temperature profiles and egg samples were to be collected at 5- or 10-mile stations. On selected transects, zooplankton samples were to be collected with a vertical Bongo haul on station and an oblique Bongo tow out of the station. Temperature, light and fluorescence profiles were to be obtained using the Magnum. In addition, on these transects, the water samples were to be collected at the surface and the fluorescence maximum and live copepods collected by means of a drift net for incubation experiments to determine egg production and moulting rates. CTD casts and ADCP measurements were planned for certain stations during both legs.

DOI: 10.15493/DEA.MIMS.15842023
Processed CTD discrete observations from the Pelagic Fish Spawner Biomass Survey on the Africana Voyage 126, November 1994

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 11 November and 07 December 1994, during Voyage 126 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.15832023
Processed CTD continuous observations from the Pelagic Fish Spawner Biomass Survey on the Africana Voyage 126, November 1994

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 11 November and 07 December 1994, during Voyage 126 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) on the west coast of Southern Africa and in the Agulhas Current Large Marine Ecosystem (ACLME) 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.

DOI: 10.15493/DEA.MIMS.15862023
Analysed nutrient data from the Gough Island Relief Voyage on the SA Agulhas II 068, September 2025

Dissolved inorganic macronutrients nitrate (NO3), nitrite (NO2), silicate (PO4) and phosphate (PO4) in the upper waters of the ocean. The availability of these macronutrients limits and regulates the production of organic matter during photosynthesis. Therefore, phytoplankton uptake of the macronutrients plays a necessary role concerning biogeochemical cycling of carbon around Gough Island and the Southern Ocean. Here we present macronutrients data collected along the upstream, near island and downstream of the Gough Island (39.8 °S, 9.5 °W and 40.8 °S, 10.4 °W) during the yearly logistical voyage of the Department of Forestry, Fisheries and the Environment (DFFE) from the 15 September to 15 October 2025. We sampled 10 stations which were grouped into three categories: upstream stations, near island stations and downstream stations. Seawater samples were analysed for macronutrients concentrations within three months of collection, with detection limits of 0.03 μM for nitrate +...

DOI: 10.15493/DEA.MIMS.15852023
Analysed nutrient data from the Gough Island Relief Voyage on the SA Agulhas II 064, September 2024

Dissolved inorganic macronutrients nitrate (NO3), nitrite (NO2), silicate (PO4) and phosphate (PO4) in the upper waters of the ocean. The availability of these macronutrients limits and regulates the production of organic matter during photosynthesis. Therefore, phytoplankton uptake of the macronutrients plays a necessary role concerning biogeochemical cycling of carbon around Gough Island and Southern Ocean. Here we present macronutrients data collected along the upstream, near island and downstream of the Gough Island (39.8 °S, 9.5 °W and 40.8 °S, 10.4 °W) during the yearly logistical voyage of the Department of Forestry, Fisheries and the Environment (DFFE) from the 5 September to 7 October 2024. We sampled 10 stations which were grouped into three categories: upstream stations, near island stations and downstream stations. Seawater samples were analysed for macronutrients concentrations within three months of collection, with detection limits of 0.03 μM for nitrate + nitrite,...

DOI: 10.15493/SOMISANA.11052026
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SA-Southeast Forecast V1.0

The SA-Southeast Forecast product provides a 5 day forecast of the ocean state along the southeastern coast of South Africa centered around Algoa Bay, and is updated daily. This product represents the operational version of the SA-Southeast Hindcast V1.0 product, and forms part of SOMISANA's South African Coastal Ocean Forecast System West (SACOFS). The model was developed using the Coastal and Regional Ocean COmmunity (CROCO) modelling system. The model curvilinear grid has a variable horizontal grid resolution (0.5 – 3 km) which increases toward the coast. The model has 30 terrain-following (sigma) vertical levels. Model bathymetry is interpolated from digital navigation charts provided by the South African National Hydrographic Office (SANHO). Open boundary conditions for our models are obtained from two ~9 km resolution global ocean analysis and forecast products: Mercator and the Hybrid Coordinate Ocean Model (HYCOM). Surface forcing for our models is obtained from both the...

DOI: 10.15493/SOMISANA.12052026
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SA-West Forecast V1.0

The SA-West Forecast product provides a 5 day forecast of the ocean state along the west coast of South Africa, updated daily. This product represents the operational version of the SA-West Hindcast V1.0 product, and forms part of SOMISANA's South African Coastal Ocean Forecast System West (SACOFS). The model was developed using the Coastal and Regional Ocean COmmunity (CROCO) modelling system. The model curvilinear grid has a variable horizontal grid resolution (1 – 2.5 km) which increases toward the coast. The model has 30 terrain-following (sigma) vertical levels. Model bathymetry is interpolated from digital navigation charts provided by the South African National Hydrographic Office (SANHO). Open boundary conditions for our models are obtained from two ~9 km resolution global ocean analysis and forecast products: Mercator and Hybrid Coordinate Ocean Model (HYCOM). Surface forcing for our models is obtained from both the ~25 km resolution Global Forecasting System (GFS) and a...

DOI: 10.15493/SOMISANA.26032025
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SA-West Hindcast V1.0

The SA-West Hindcast V1.0 product provides a 32 year historical representation of the ocean state for the west coast of South Africa. The model was developed using the Coastal and Regional Ocean COmmunity (CROCO) modelling system. The model curvilinear grid has a variable horizontal grid resolution (1 – 2.5 km) which increases toward the coast. The model has 30 terrain-following (sigma) vertical levels. Open boundary conditions for the model are obtained from GLORYS12V1. Surface forcing is interpolated from ERA5. Model bathymetry is interpolated from digital navigation charts provided by SANHO. This configuration does not include tides. The model configuration files can be found at the somisana-croco github repository using compile options in the `C01` directory in the provided link. NetCDF model output files are available as daily averages throughout the water column, and hourly averages for the surface layer of the model. Subsets of the files can be downloaded via Thredds...

DOI: 10.15493/SOMISANA.23042026
No Download
SA-Southeast Hindcast V1.0

The SA-Southeast Hindcast V1.0 product provides a 10 year historical representation of the ocean state along the southeastern coast of South Africa centered around Algoa Bay. The model was developed using the Coastal and Regional Ocean COmmunity (CROCO) modelling system. The model curvilinear grid has a variable horizontal grid resolution (0.5 – 3 km) which increases toward the coast. The model has 30 terrain-following (sigma) vertical levels. Open boundary conditions for the model are obtained from GLORYS12V1. Surface forcing is interpolated from the 3 km resolution Wind Atlas for South Africa (WASA) product provided by the Climate Systems Analysis Group (CSAG). Model bathymetry is interpolated from digital navigation charts provided by SANHO. This configuration does not include tides. The model configuration files can be found at the somisana-croco github repository using compile options in the `C01` directory in the provided link. NetCDF model output files are available as daily...

DOI: 10.15493/DEA.MIMS.40072024
Processed CTD continuous observations from the Physical Oceanography Gear Trials on the Africana Voyage 091, April 1991

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected, between 29 April and 30 April 1991, during voyage 091 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region 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.

DOI: 10.15493/DEA.MIMS.29072024
Processed CTD discrete observations from the Pelagic Biomass Survey on the Africana Voyage 087, November 1990

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected, between 06 November and 30 November 1990, during voyage 087 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa and 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.

DOI: 10.15493/DEA.MIMS.27072024
Pelagic Biomass Survey on the Africana Voyage 087, November 1990

The Pelagic Biomass Survey was conducted on the Africana Voyage 087 from 06 - 30 November 1990. The objectives of the cruise were to obtain an estimation of the biomass and population structure of anchovy, pilchard and round herring off South Africa by means of echo-integration and midwater trawling; estimation of anchovy biomass by means of the egg production method; description of distribution and behaviour patterns of commercially harvested epi-pelagic and meso-pelagic fish, and the influence of oceanographic variables on these; collection of biological data on reproduction, condition and diet of pelagic fish species; examination of the distribution, abundance and production of zooplankton in relation to the environment, and to pelagic fish distribution, condition, diet and spawning activity; profiling of currents by means of the acoustic doppler current profiler; investigation into the feasibility of assessing inshore squid biomass acoustically, and of mapping the...

DOI: 10.15493/DEA.MIMS.28072024
Processed CTD continuous observations from the Pelagic Biomass Survey on the Africana Voyage 087, November 1990

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected, between 06 November and 30 November 1990, during voyage 087 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa and 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.

DOI: 10.15493/DEA.MIMS.41072024
Processed CTD discrete observations from the Physical Oceanography Gear Trials on the Africana Voyage 091, April 1991

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected, between 29 April and 30 April 1991, during voyage 091 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region 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.

44 datasets found Page 2 of 2

Geographic extent

Temporal extent