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DOI: 10.15493/DEA.MIMS.13912023

Long-term monitoring of inshore temperatures in Elands Bay to support physiological research

To better understand the physiological effects of climate change and ocean acidification on marine organisms, information on the environmental conditions experienced in their natural habitats is required. Data from long-term monitoring studies capture in situ variability of environmental parameters that are used to relate experimental findings with field conditions. Elands Bay on the west coast of South Africa is a key location for such research and monitoring. It is a popular location for West Coast rock lobster (Jasus lalandii) fishing and therefore an important sentinel site for a commercial fishery species and the benthic communities upon which it depends. Low pH conditions exist along the west coast due to effects of upwelling, while cold-bottom waters in Elands Bay often result in low oxygen events responsible for mass walkouts of rock lobster. Additional exposure to extreme stressors associated with climate change can exacerbate impacts on their physiological processes. For...

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.26052147

CTD and bottle test data during GINA 2017 for Seaglider SG574 collected in Cape Town harbour

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). Ocean gliders are robotic platforms operated and piloted from land. The Seaglider during GINA 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 test CTD and Bottle data, collected outside of Cape Town...

DOI: 10.15493/dea.mims.26052148

Seaglider test data collected during GINA 2017 by Seaglider SG574 in Cape Town harbour

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). Ocean gliders are robotic platforms operated and piloted from land. The Seaglider during GINA 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 Seaglider data, collected outside of Cape Town Harbour, used...

DOI: 10.15493/dea.mims.26052350

Long-term monitoring of seawater temperature in the microhabitats of intertidal marine invertebrates in Sea Point, South Africa

To better understand the physiological effects of marine invertebrates to changing environmental conditions, long-term monitoring which captures the natural variability of environmental parameters is required. In this way, experimental findings can be related back to field conditions, and better predictions can be made as to how marine invertebrates, particularly in the harsh intertidal, will fair with rising temperature. In May 2020, Cape Sea Urchins, Parechinus angulosus, were collected from intertidal rock pools at Sea Point, which is situated along the southwest coast of South Africa. After chronic incubation in low pH conditions at the Department of Forestry, Fisheries and the Environment (DFFE) Sea Point Research Aquarium, their response to thermal stress was investigated in recent experimental trials. To calculate the thermal window for these marine invertebrates, both habitat temperatures, as well as their threshold temperatures are required. The latter was obtained by...

DOI: 10.15493/DEA.MIMS.15222023

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

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Paternoster, 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.15192023

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

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Hout 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.15182023

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

Here we present a collection of raw and processed temperatures from Underwater Temperature Recorders (UTRs) located off Elands 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.21042025

Processed underway Thermosalinograph (TSG) observations from SA Agulhas II Voyage 061, December 2023 - February 2024

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 26 December 2023 and 20 February 2024, during voyage 061 on the SA Agulhas II. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.19042025

Processed underway Thermosalinograph (TSG) observations from SA Agulhas II Voyage 056, December 2022 - February 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 16 December 2022 and 12 February 2023, during voyage 056 on the SA Agulhas II. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.15042025

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 298, January 2024

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 22 January and 26 January 2024, during voyage 298 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.13042025

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 297, January 2024

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 12 January and 17 January 2024, during voyage 297 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.11042025

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 293, August 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 15 August and 22 August 2023, during voyage 293 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/dea.mims.20210409

Processed underway Thermosalinograph (TSG) observations from the Algoa Voyage 269, October 2020

A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C). Here we present the 6-second resolution processed TSG data collected between 03 October 2020 and 16 October 2020, during Voyage 269 on the Algoa.

DOI: 10.15493/dea.mims.25010001

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 268, February 2020

A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C). Here we present the 10-second resolution processed TSG data collected, between 25 February 2020 and 04 March 2020, during Voyage 268 on the Algoa.

DOI: 10.15493/DEA.MIMS.09042025

Processed underway Thermosalinograph (TSG) observations from RS Algoa Voyage 266, November 2019

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 04 November and 14 November 2019, during voyage 266 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.07042025

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 252, August 2018

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 20 August and 28 August 2018, during voyage 252 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.05042025

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 239, May 2017

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 22 May and 29 May 2017, during voyage 239 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.03042025

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 221, November 2015 - December 2015

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 30 November and 06 December 2015, during voyage 221 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.01042025

Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 209, August 2014

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 05 August and 12 August 2014, during voyage 209 on the RS Algoa. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C).

DOI: 10.15493/DEA.MIMS.15092023

Processed CTD discrete observations from the Anchovy and Pilchard Recruitment Survey on the Africana Voyage 121, May 1994

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 03 May and 27 May 1994, during Voyage 121 on the FRS 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.15082023

Processed CTD continuous observations from the Anchovy and Pilchard Recruitment Survey on the Africana Voyage 121, May 1994

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 03 May and 27 May 1994, during Voyage 121 on the FRS 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.14992023

Processed CTD discrete observations from the West Coast Hake Biomass on the Africana Voyage 118, January 1994

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 04 January and 26 January 1994 during Voyage 118 on the FRS Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south coast of Southern Africa and 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.14982023

Processed CTD continuous observations from the West Coast Hake Biomass on the Africana Voyage 118, January 1994

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 04 January and 26 January 1994 during Voyage 118 on the FRS Africana, in the Agulhas Current Large Marine Ecosysten (ACLME) region on the south coast of Southern Africa and 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.14972023

Processed CTD discrete observations from the Pelagic Fish Spawner Biomass Survey on the Africana Voyage 117, November 1993

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 09 November and 04 December 1993 during Voyage 117 on the FRS Africana, in the Agulhas Current Large Marine Ecosystem (ACLME) region on the south coast of Southern Africa and 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.

Project

Location

Instrument

License

Essential Ocean Variables

Essential Biodiversity Variables

Selected Records Subset