739 datasets found Page 22 of 30
DOI: 10.15493/DEA.MIMS.43112024
Processed CTD continuous observations from the South Coast Demersal Biomass Survey on the Africana Voyage 111, April 1993

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected, between 15 April and 12 May 1993, during the South Coast Demersal Biomass Survey on the Africana Voyage 111, in the Agulhas Current Large Marine Ecosysten (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.09902023
Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 258, February 2019

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 28 February 2019 and 07 March 2019 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the RS Algoa Voyage 258. A SeaBird SBE45 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). This is a long-term monitoring line conducted off the coast of Kleinsee, Namaqualand, Elands/St Helena Bay and Scarborough on the west coast of South Africa. The IEP:SB in 2013...

DOI: 10.15493/DEA.MIMS.13112024
Processed CTD continuous observations from the Pelagic Biomass Survey on the Africana Voyage 108, November 1992

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected, between 05 November and 02 December 1992, during voyage 108 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) 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.09982023
Processed underway Thermosalinograph (TSG) observations from the Southern Ocean Seasonal Experiment 2022 on the SA Agulhas II Voyage 053, July 2022

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 12 July and 30 July 2022 on the SA Agulhas II Voyage 053. A SeaBird SBE45 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). This cruise was included as a final component of the SCALE programme (Southern oCean seAsonaL Experiment, https://scale.org.za), a bottom-up endeavour of the SA scientific community to address the limited multidisciplinary knowledge on the seasonal cycle of the...

DOI: 10.15493/DEA.MIMS.09962023
Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the Algoa Voyage 274, August 2021

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 22 August and 30 August 2021 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the RS Algoa Voyage 274. A SeaBird SBE45 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). This is a long-term monitoring line conducted off the coast of Kleinsee, Namaqualand, Elands/St Helena Bay and Scarborough on the west coast of South Africa. The IEP:SB in 2013 consolidated a...

DOI: 10.15493/DEA.MIMS.13502023
Processed underway Thermosalinograph (TSG) observations from the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) on Algoa Voyage 295, September 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 18 September 2023 and 08 October 2023 during the South Atlantic Meridional Overturning Circulation Basin-wide Array (SAMBA) cruise on the RS Algoa Voyage 295. A SeaBird SBE45 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.13562023
Processed underway Thermosalinograph (TSG) observations from the Marion Island Relief Voyage on SA Agulhas II Voyage 057, April 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 16 April 2023 and 18 May 2023 during the Marion Island Relief Voyage on the SA Agulhas II Voyage 057. A SeaBird SBE45 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.13402023
Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on Algoa Voyage 244, November 2017

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 20 November and 29 November 2017 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the RS Algoa Voyage 244. A SeaBird SBE45 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.13362023
Processed underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on Algoa Voyage 235, February 2017

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 17 February and 24 February 2017 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) on the RS Algoa Voyage 235. A SeaBird SBE45 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).

(No DOI)
Preliminary processed CTD continuous observations from the Algoa Voyage 244, November 2017

SeaBird CTD Conductivity-Temperature-Depth (CTD) instruments were used to measure pressure, temperature and conductivity through the water column. During some cruises additional instruments for oxygen, fluorescence, Photosynthetically Available Radiation (PAR), Surface PAR (SPAR), turbidity, beam attenuation, beam transmission measurements were connected to the CTD unit. Here we present preliminary processed downcast CTD continuous data collected between 22 November 2017 and 27 November 2017, during Voyage 244 on the Algoa, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of South Africa. This data was collected as part of the Intergrated Ecosystem Programme: Southern Benguela (IEP:SB), which has been conducting multi-disciplinary long-term monitoring along the Kleinsee, Namaqualand, Elands/St Helena Bay and Scarborough transects off the west coast of South Africa since 2013.

DOI: 10.15493/DEA.MIMS.35092025
Processed CTD discrete observations from the Plankton Dynamics During an Upwelling Cycle on the Africana Voyage 128, February 1995

Here we present processed downcast Conductivity-Temperature-Depth (CTD) discrete data collected between 16 February 1995 and 26 February 1995, during the Plankton Dynamics During an Upwelling Cycle cruise on the Africana Voyage 128, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of Southern Africa. The main objective of the cruise was to study plankton processes following upwelling and to track upwelled water masses with drogues.

DOI: 10.15493/DEA.MIMS.07552023
Processed underway Thermosalinograph (TSG) observations from Algoa Voyage 281, March 2022

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected, between 26 March and 29 March 2022, during Voyage 281 on the RS Algoa. A SeaBird SBE45 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.26000004
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St Helena Bay Monitoring Line (SHBML) on the Algoa Voyage 089, January 2001

This St Helena Bay Monitoring Line (SHBML) cruise was conducted on the Algoa Voyage 089 in January 2001. This is a long-term monitoring line conducted off the coast of Elands/St Helena Bay on the west coast of South Africa. SHBML started in 2000 as a BENEFIT-driven project on "shipboard monitoring" which linked with similar lines run in Namibia and Angola. The aims were to obtain seasonal and interannual information on the hydrology and productivity of the area. It was incorporated under the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) in 2013 consolidating a long-term, multi-decadal time-series (from 1951 onward) of information for this important region and has continued monitoring in the form of the IEP:SB. The programme is a multi-disciplinary, collaborative and capacity building platform undertaking relevant science, including updating technology, with the aim to develop ecosystem indicators that can be used to effectively monitor and understand the Southern...

DOI: 10.15493/dea.mims.26052244
Transkei Shelf Oceanography Cruise on the Algoa Voyage 241, July 2017

The Transkei Shelf Oceanography Cruise was conducted on the Algoa V241, 12 July to 11 August, 2017. The area covered includes the Transkei shelf and continental slope (20m to 1000m), of the Eastern Cape, between Cape St Francis and Port Shepstone in the South-West Indian Ocean.Our knowledge of the distribution of offshore benthic biodiversity on the Transkei shelf is very limited. The region between Algoa Bay and Port Edward is not only important for understanding the functioning of existing Marine Protected Areas (MPAs) such as Pondoland, Dwesa-Cwebe, and the Amathole, but is of particular relevance to the new Operation Phakisa proposed MPA network that will potentially include additional MPAs such as the Protea Banks, Amathole Expansion, and the proposed Addo MPA. In addition, further knowledge is needed to support decision-making about the offshore extent of the Dwesa-Cwebe MPA. The oceanography in the form of water column and energy characteristics, circulation regimes and...

DOI: 10.15493/DEA.MIMS.11462023
Processed Expendable Bathythermograph (XBT) casts collected during the Marion Island Relief Voyage on the SA Agulhas II Voyage 057, May 2023

Here we present 31 processed Expendable Bathythermograph (XBT) casts collected in the South West Indian Ridge area and along the Crossroads Transect, between 14 May 2023 and 18 May 2023, during the 2023 Marion Relief Voyage on the SA Agulhas II Voyage 057. 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 Conductivity-Temperature-Depth (CTD) stations and XBT casts, where the XBT casts are done, at set intervals, between CTD stations to complement the CTD data.

DOI: 10.15493/dea.mims.26000002
No Download
St Helena Bay Monitoring Line (SHBML) on the Ellen Kuzwayo Voyage 005, January 2008

This St Helena Bay Monitoring Line (SHBML) cruise was conducted on the Ellen Kuzwayo Voyage 005 in January 2008. This is a long-term monitoring line conducted off the coast of Elands/St Helena Bay on the west coast of South Africa. SHBML started in 2000 as a BENEFIT-driven project on "shipboard monitoring" which linked with similar lines run in Namibia and Angola. The aims were to obtain seasonal and interannual information on the hydrology and productivity of the area. It was incorporated under the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) in 2013 consolidating a long-term, multi-decadal time-series (from 1951 onward) of information for this important region and has continued monitoring in the form of the IEP:SB. The programme is a multi-disciplinary, collaborative and capacity building platform undertaking relevant science, including updating technology, with the aim to develop ecosystem indicators that can be used to effectively monitor and understand the...

DOI: 10.15493/DEA.MIMS.11582023
Processed CTD continuous observations from the South-east Atlantic Expedition on the Africana Voyage 071, April 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 04 April and 02 May 1989 during Voyage 071 on the FRS Africana, South Atlantic Ocean and 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. The South-east Atlantic Expedition had as its main objectives the investigation of the distribution and abundance of phyllosoma larvae of Jasus in the Cape Basin, a comparative study of larval recruitment of Jasus tristani and Jasus lalandii, and the investigation of the circulation in, and ventilation of, the south western Cape Basin. The work was aimed at improving the understanding of the dynamics, in particular recruitment, of rock lobsters in the South-east Atlantic, and at furthering knowledge about some...

DOI: 10.15493/DEA.MIMS.11612023
Processed CTD continuous observations from the Anchovy Recruitment Survey on the Africana Voyage 073, June 1989

Here we present processed downcast Conductivity-Temperature-Depth (CTD) continuous data collected between 08 and 22 June 1989 during Voyage 073 on the FRS Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of South 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. The objectives of the Anchovy Recruitment Survey were to assess anchovy recruitment strength in South African waters in order to recommend a final quota for the 1989 RSA anchovy fishing season; to collect data for the determination of the target strength of anchovy and other pelagic and mesopelagic species; to collect data on shoaling behaviour of pelagic fish, specifically anchovy, pilchard and red-eye; to investigate relationships between the distribution of pelagic fish, zooplankton and water temperature; to determine standing stocks of...

DOI: 10.15493/DEA.MIMS.11502023
Processed CTD discrete observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 067, September 1988

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 14 and 30 September 1988 during Voyage 067 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. The Physical-Chemical Oceanography Cruise was divided into two legs with the first leg focusing on physical oceanography and the latter on chemical oceanography. The purpose of the first leg of the cruise was primarily to moor current meters and water-level recorders at various sites, mostly north of the Orange River, and to obtain a precise set of Conductivity-Temperature-Depth (CTD) data on a line running normal to the topography from a point in 4200m of water into Conception Bay. The CTD data will be used to calculate water...

DOI: 10.15493/DEA.MIMS.11592023
Processed CTD discrete observations from the South-east Atlantic Expedition on the Africana Voyage 071, April 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 04 April and 02 May 1989 during Voyage 071 on the FRS Africana, in the South Atlantic Ocean and 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. The South-east Atlantic Expedition had as its main objectives the investigation of the distribution and abundance of phyllosoma larvae of Jasus in the Cape Basin, a comparative study of larval recruitment of Jasus tristani and Jasus lalandii, and the investigation of the circulation in, and ventilation of, the south western Cape Basin. The work was aimed at improving the understanding of the dynamics, in particular recruitment, of rock lobsters in the South-east Atlantic, and at furthering...

DOI: 10.15493/DEA.MIMS.11562023
Processed CTD discrete observations from the Physical-Chemical Oceanography Cruise on the Africana Voyage 070, March 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 02 and 11 March 1989 during Voyage 070 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. The objectives of the Physical-Chemical Oceanography Cruise were to retrieve six acoustic current meters deployed in September 1988; to recover and redeploy the sequentially sampling sediment trap and the two Anderaa current meters incorporated on the array at a position 90 miles west of Walvis Bay; to repeat a line of CTD stations running at right angles to the shelf from the 4000m Cape Basin station towards Conception Bay; to take size-fractional chlorophyll samples at 3-hourly intervals to calibrate the in-line fluorometer in the...

DOI: 10.15493/DEA.MIMS.11662023
Processed CTD discrete observations from the South West African Pilchard and Anchovy Biomass Survey on the Africana Voyage 074, June 1989

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 22 June and 04 July 1989 during Voyage 074 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. The objectives of the South West African Pilchard and Anchovy Biomass Survey were to undertake an acoustic / trawling survey of the pilchard stock off SWA and arrive at a stock estimate; to survey the horse-mackerel and anchovy stocks off South West Africa (SWA) and obtain stock estimates if possible and to collect the environmental information on the habitat of the above species primarily by means of CTD and U³ dips in the upper 200m.

DOI: 10.15493/DEA.MIMS.605203
Analysed Nutrient data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 235, February 2017

Nutrient data for the Integrated Ecosystem Programme: Southern Benguela (IEP:SB): Feb 2017.IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive to changing weather patterms. The research aims to provide relevant, reliable and improved assessment of the ecosystem, in support of its effective management, preservation and conservation, so that South Africans can benefit from a healthy and well-functioning ocean environment. The overarching objective is to enhance understanding in process studies by assessing the importance, timing and magnitude of mechanisms and processes that influence the Southern Benguela ecosystem structure and functioning, including the climate variability.

DOI: 10.15493/DEA.MIMS.605205
Analysed Nutrient data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 242, August 2017

Nutrient data for the Integrated Ecosystem Programme: Southern Benguela (IEP: SB): Aug 2017 from all stations. IEP:SB focuses on the biologically productive, cold waters of the Benguela Current Large Marine Ecosystem, which are inherently variable on short time-scales and responsive to changing weather patterns. The research aims to provide relevant, reliable and improved assessment of the ecosystem, in support of its effective management, preservation and conservation, so that South Africans can benefit from a healthy and well-functioning ocean environment. The overarching objective is to enhance understanding in process studies by assessing the importance, timing and magnitude of mechanisms and processes that influence the Southern Benguela ecosystem structure and functioning, including the climate variability.

DOI: 10.15493/dea.mims.26052155
Processed Expendable Bathythermograph (XBT) casts collected during the 2016 Marion Relief Voyage on SA Agulhas Voyage 019

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 29 processed XBT casts collected along the Crossroads Transect, between 08 May 2016 and 12 May 2016, during the 2016 Marion Relief Voyage.

739 datasets found Page 22 of 30

Geographic extent

Temporal extent