MIMS Catalogue

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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/DEA.MIMS.20240821

Raw data collected by Seaglider SG573 off Cape Town for CTD calibration (SeaTrials 2)

The Gliders in the Agulhas (GINA) project is a multi-institutional effort to implement sustained glider observations around South Africa’s coastline to enhance existing regional networks and complement larger international observations systems such as the Ocean Gliders Boundary Ocean Observing Network (BOON). This dataset includes all data collected by Seaglider SG573 during the first GINA deployment in 2018. The Seaglider was set-up to vertically profile the water column between depths of 0 and 1000m. Measurements collected included conductivity (salinity), temperature, depth (CTD), dissolved oxygen, chlorophyll-a fluorescence (proxy for phytoplankton concentration), Photosynthetically Active Radiation (PAR) and two wavelengths of optical back-scattering by particles, Bb(470) and Bb(700) (proxies for particle concentration). In addition, information collected from the Seaglider was used to derive surface and depth averaged currents. This is raw data collected by Seaglider SG573...

DOI: 10.15493/DEA.MIMS.15292023

Long-term observations of hourly bottom temperatures at Sodwana Bay, South Africa

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Sodwana Bay, South Africa. At selected sites around Southern Africa, UTRs have been used to obtain long-term records of bottom temperatures in the nearshore environment, at depths ranging from 2m to 34m.

DOI: 10.15493/DEA.MIMS.15242023

Long-term observations of hourly bottom temperatures at Xai-Xai, Mozambique

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Xai-Xai, Mozambique. At selected sites around Southern Africa, UTRs have been used to obtain long-term records of bottom temperatures in the nearshore environment, at depths ranging from 2m to 34m.

DOI: 10.15493/DEA.MIMS.15382023

Long-term observations of hourly bottom temperatures at Port Nolloth, South Africa

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Port Nolloth, South Africa. At selected sites around Southern Africa, UTRs have been used to obtain long-term records of bottom temperatures in the nearshore environment, at depths ranging from 2m to 34m.

DOI: 10.15493/DEA.MIMS.29112024

Short-term observations of currents and sub-surface temperatures on the continental shelf off Port St Johns, along the east coast of South Africa

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 95m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns on the east coast of South Africa.

DOI: 10.15493/DEA.MIMS.37112024

Short-term observations of hourly bottom temperatures on the continental shelf off Port St Johns, along the east coast of South Africa (December 2013 - September 2014)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability of Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 90m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns on the east coast of South Africa. Here we present processed hourly bottom temperatures (85 m) from an ADCP at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between December 2013 and September 2014.

DOI: 10.15493/DEA.MIMS.36112024

Short-term observations of daily bottom temperatures on the continental shelf off Port St Johns, along the east coast of South Africa (December 2013 - September 2014)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 90m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns on the east coast of South Africa. Here we present processed daily bottom temperatures (85 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between December 2013 and September 2014.

DOI: 10.15493/DEA.MIMS.35112024

Short-term observations of hourly bottom temperatures on the continental shelf off Port St Johns, along the east coast of South Africa (July 2013 - December 2013)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability of Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 95m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns on the east coast of South Africa. Here we present processed hourly bottom temperatures (90 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between July 2013 and December 2013.

DOI: 10.15493/DEA.MIMS.34112024

Short-term observations of daily bottom temperatures on the continental shelf off Port St Johns, along the east coast of South Africa (July 2013 - December 2013)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 95m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns on the east coast of South Africa. Here we present processed daily bottom temperatures (90 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between July 2013 and December 2013.

DOI: 10.15493/DEA.MIMS.33112024

Short-term observations of hourly currents on the continental shelf off Port St Johns, along the east coast of South Africa (December 2013 - September 2014)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 90m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns, on the east coast of South Africa. Here we present processed magnitude and direction of hourly currents throughout the water column (4.24 - 90.24 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between December 2013 and September 2014.

DOI: 10.15493/DEA.MIMS.32112024

Short-term observations of daily currents on the continental shelf off Port St Johns, along the east coast of South Africa (December 2013 - September 2014)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 90m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns, on the east coast of South Africa. Here we present processed magnitude and direction of daily currents throughout the water column (4.24 - 90.24 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the inner shelf off Port St Johns, between December 2013 and September 2014.

DOI: 10.15493/DEA.MIMS.31112024

Short-term observations of hourly currents on the continental shelf off Port St Johns, along the east coast of South Africa (July 2013 - December 2013)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 95m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns, on the east coast of South Africa. Here we present processed magnitude and direction of hourly currents throughout the water column (2 - 86 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the continental shelf off Port St Johns, between July 2013 and December 2013.

DOI: 10.15493/DEA.MIMS.30112024

Short-term observations of daily currents on the continental shelf off Port St Johns, along the east coast of South Africa (July 2013 - December 2013)

Between 2013 and 2014, a short-term mooring deployment was conducted to determine the oceanographic characteristics and variability off Port St Johns, along the east coast of South Africa. One mooring (PJ) was deployed, at a depth of 95 m, between July 2013 and September 2014. This mooring measured currents, as well as sub-surface bottom temperatures on the continental shelf off Port St Johns, on the east coast of South Africa. Here we present processed magnitude and direction of daily currents throughout the water column (2 - 86 m) from an Acoustic Doppler Current Profiler (ADCP) at location PJ (31.73°S; 29.51°E) on the inner shelf off Port St Johns, between July 2013 and December 2013.

DOI: 10.15493/DEA.MIMS.14512023

Surface Chlorophyll a concentration and Secchi depth data from the SEAHAB project, March 2023

This was the in situ data collection for the Sensor-agnostic Estimation of Harmful Algal Blooms (SEAHAB) project, March 2023. The data represents two days of surface water sampling between Table Bay and Kommetjie for the purpose of satellite chlorophyll a concentration and water clarity validation.

DOI: 10.15493/DEA.MIMS.38042025

Short-term observations of daily currents at the Walters Shoal, southwest Indian Ocean at location WSN01 (26 May 2014 - 01 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.37042025

Short-term observations of hourly currents at the Walters Shoal, southwest Indian Ocean at location WSN01 (25 May 2014 - 02 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.36042025

Short-term observations of daily currents at the Walters Shoal, southwest Indian Ocean at location WSS01 (30 May 2014 - 02 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.35042025

Short-term observations of hourly currents at the Walters Shoal, southwest Indian Ocean at location WSS01 (29 May 2014 - 02 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.34042025

Short-term observations of daily bottom temperatures at the Walters Shoal, southwest Indian Ocean at location WSN01 (26 May 2014 - 01 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.33042025

Short-term observations of hourly bottom temperatures at the Walters Shoal, southwest Indian Ocean at location WSN01 (25 May 2014 - 02 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.32042025

Short-term observations of daily bottom temperatures at the Walters Shoal, southwest Indian Ocean at location WSS01 (30 May 2014-01 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.31042025

Short-term observations of hourly bottom temperatures at the Walters Shoal, southwest Indian Ocean at location WSS01 (29 May 2014- 02 August 2015)

The Walters Shoal project, part of the broader African Coelacanth Ecosystem Programme (ACEP III), conducted an oceanographic and biological survey of the Walters Shoal, a shallow seamount in the southwest Indian Ocean, in order to understand the biodiversity and ecological processes occurring on this unique seamount. The project used a multidisciplinary approach that included the sampling of sponge fauna, fish populations, and oceanographic conditions. Oceanographic data (including moored ADCP data, CTD profiles, as well as underway S-ADCP and TSG data) was collected to understand the circulation patterns and hydrography that could influence the biological communities on the seamount. Here, we present the moored ADCP data that was collected to determine currents and sub-surface temperatures. Two ADCP moorings were deployed, one on the northern part and the other on the southern part of Walters Shoal, at depths of 500m, between May 2014 and August 2015. Here we present processed...

DOI: 10.15493/DEA.MIMS.26052050

Long-term moored observations from the eastern part of the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA)

Here we present long-term observations from the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) transect in the Cape Basin region along 34.5°S. SAMBA forms part of the South African component of the International South Atlantic Meridional Overturning Circulation project (SAMOC-SA), which aims to characterise the time-mean and time-varying components of the SAMOC in the South Atlantic Ocean and monitor the variability of the main Southern Ocean frontal systems associated with the Antarctic Circumpolar Current (ACC), south of Africa.

DOI: 10.15493/dea.mims.26052159

Processed Expendable Bathythermograph (XBT) casts collected during the 2019 Marion Relief Voyage on SA Agulhas Voyage 036

The South African component of the international South Atlantic Meridional Overturning Circulation project (SAMOC-SA) aims to characterise the time-mean and time-varying components of the SAMOC in the South Atlantic Ocean and monitor the variability of the main Southern Ocean frontal systems associated with the Antarctic Circumpolar Current (ACC), south of Africa. The Crossroads monitoring line, directly under the altimetry track N198, is sampled annually during the Marion Relief voyages, using a combination of CTD stations and XBT casts, where the XBT casts are done, at set intervals, between CTD stations to complement the CTD data. Here we present 57 processed XBT casts collected along the Crossroads Transect, between 10 May 2019 and 14 May 2019, during the 2019 Marion Relief Voyage.

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Essential Ocean Variables

Essential Biodiversity Variables

Selected Records Subset