739 datasets found Page 6 of 30
DOI: 10.15493/DEA.MIMS.605202
Analysed Particulate Organic Matter data from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 239, May 2017

Particulate Organic Matter data (stable isotope) for the Integrated Ecosystem Programme: Southern Benguela (IEP:SB): May 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 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.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.

(No DOI)
No Download
Raw SADCP data from the West Coast Cetacean Distribution and Abundance Survey on the Algoa Voyage 231, October 2016

Raw Shipboard Acoustic Doppler Current Profiler (SADCP) data for the 2016 West Coast Cetacean Cruise. The survey operated on the shelf and slope regions off the west coast of South Africa, between Area 1 (Dassen Island, 18.23669, -33.457 and Groenriviermond, 17.52061, -30.8277) and Area 2 (North-East Robben Island and Cape Point). This cruise was undertaken for data collection as part of a collaborative project led by the Department of Environmental Affairs (DEA) in collaboration with the Whale Unit, Mammal Research Institute of the University of Pretoria, Department of Agriculture, Forestry and Fisheries (DAFF), National Oceanic and Atmospheric Administration (USA), Aqualie Institute (Brazil) and Oregon State University (USA). The greater programme is titled "Large whale research: genetic relatedness, stock identification, abundance, feeding and migratory behavious". The large whale research programme has two components, the east coast and west coast components. This cruise...

(No DOI)
No Download
Raw TSG data from ACEP Deep Secrets: The Outer Shelf and Slope Ecosystems of the Eastern Cape on the Algoa Voyage 230, September 2016

This is raw Thermosalinograph (TSG) data collected on the ACEP Deep Secrets Cruise which set out to fill in gaps and shed light on the priority areas and research questions identified during the recent Marine Protected Area and Marine Spatial Planning Initiatives of Operation Phakisa’s Marine Protection and Governance Lab. Using underwater cameras (SkiMonkey and Drop camera), grabs, dredges and a CTD the study aimed to improve our knowledge on marine offshore habitats, as well as to build understanding of the effects of the expanding fishing and petroleum industries on marine offshore communities.

DOI: 10.15493/DEA.MIMS.05112024
Processed CTD discrete observations from the Benguela Current Sources and Transport (BEST 1) on the Africana Voyage 105, June 1992

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected, between 16 June and 05 July 1992, during voyage 105 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.08112024
Processed CTD discrete observations from the South Coast Demersal Inshore Biomass Survey on the Africana Voyage 106, September 1992

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected, between 02 September and 23 September 1992, during voyage 106 on the FRS Africana, 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.

(No DOI)
Raw SADCP data from the St Helena Bay Monitoring Line (SHBML) on the Algoa Voyage 195, March 2013

This is raw Shipboard Acoustic Doppler Current Profiler (SADCP) data from the St Helena Bay Monitoring Line, which now falls under the Integrated Ecosystem Programme: Southern Benguela, on the Algoa Voyage 196, 4 to 8 March, 2013.The St Helena Bay Monitoring Line was initiated as a BENEFIT-driven project on "shipboard monitoring" which linked with similar lines run in Namibia and Angola. The aims are to obtain seasonal and interannual information on the hydrology and productivity of the area. Data on harmful algal blooms, low oxygen water and intrusions of Agulhas Bank water along the west coast will also be collected. A long-term, multi-decadel time-series (from 1951 onward) of information already exists for this important region and has continued in the form of the IEP:SB to detect long-term changes in the hydrology and the plankton, which are important for the detection of regime shifts.

(No DOI)
Processed CTD data from Leg 1 of the African Coelacanth Ecosystem Programme (ACEP) II on the Algoa Voyage 177, July 2010

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...

DOI: 10.15493/dea.mims.01022028
Processed CTD discrete observations from the Africana Voyage 009, May 1983

Neil Brown MK3 and MK4 Conductivity-Temperature-Depth (CTD) instruments were used to measure pressure, temperature and conductivity through the water column during research and monitoring cruises between 1983 and 2000. Here we present processed CTD discrete data from the upcast collected during Voyage 009 on the Africana, in the Benguela Current Large Marine Ecosystem (BCLME) region on the west coast of South Africa, between 5 May 1983 and 29 May 1983.

(No DOI)
Raw SADCP data from the Winter Shakedown Cruise on SA Agulhas II Voyage 003, July 2012

This is raw Shipboard Acoustic Doppler Current Profiler (SADCP) data from the Winter Shakedown Cruise on SA Agulhas II, Voyage 003, 9 July to 6 August, 2012. The cruise started in Cape Town and went down to the GoodHope Line then up to the Prince Edward Islands, on to Port Elizabeth and then back to Cape Town. After the arrival of SA Agulhas II back to South Africa, an inaugural Southern Ocean cruise was undertaken, which included a multidisciplinary program to measure oceanographic and biological parameters that characterise the state of the Southern Ocean in the region of interest to South Africa, along with the ecosystem properties of the major gyres, frontal systems and shelf and plateau areas. Additionally, land-based research on marine mammals and seabirds was undertaken at South Africa’s Prince Edward Islands (PEIs). The aim of the cruise was to test the research vessels capability and its equipment and to increase our understanding with regard to the influences of...

DOI: 10.15493/dea.mims.26052194
Marion Island Relief Voyage on the SA Agulhas II Voyage 007, April 2013

The Marion Island Relief Voyage was conducted on the SA Agulhas II Voyage 007, 10 April to 16 May 2013. The 2013 Marion Relief Voyage 007 on board South Africa’s new polar research and supply vessel, the SA Agulhas II, afforded yet another opportunity to conduct multi-institutional (DEA, DAFF, UCT, SAEON, Rhodes University) and multi-disciplinary ship-based oceanographic research that focused on links and interactions between air and sea, ocean physics, biogeochemistry, plankton and benthic communities and island-based top predators. The overall aim is to establish an oceanographic observation and monitoring system directed by South African research institutions in support of South Africa’s needs – and where possible, the global requirements of the Southern Ocean Observation System (SOOS), CCAMLR, ACAP, etc., by documenting ship-board observations in the oceanic environment around the Prince Edward Islands in a holistic manner, from the sea floor, through water column and food-web...

(No DOI)
Processed XBT data from Gough Island Relief on SA Agulhas II Voyage 012, September 2014

The is processed Expendable Bathythermograph (Expendable Bathythermograph (XBT)) data from the Gough Island Relief Voyage on SA Agulhas II Voyage 012, 04 September 2014 and 9 October 2014. The Gough Island Relief Voyage is an annual cruise undertaken by the Department of Environmental Affairs (DEA) to change the overwintering team in Gough Island and to replenish the supplies at the British’s leased Gough Island Research base. The cruise also serves as a means to transport the residents and/or visitors to Tristan da Cunha using a signed agreement between South Africa and United Kingdom (UK). This voyage was to deliver the Gough 60 team to the island and return with the Gough 59 team.

(No DOI)
Raw SADCP data from the Marion Island Relief Voyage on the SA Agulhas II Voyage 007, April 2013

This is raw Shipboard Acoustic Doppler Current Profiler (SADCP) data from the Marion Island Relief Voyage on the SA Agulhas II Voyage 007, 10 April to 16 May 2013. The 2013 Marion Relief Voyage 007 on board South Africa’s new polar research and supply vessel, the SA Agulhas II, afforded yet another opportunity to conduct multi-institutional (DEA, DAFF, UCT, SAEON, Rhodes University) and multi-disciplinary ship-based oceanographic research that focused on links and interactions between air and sea, ocean physics, biogeochemistry, plankton and benthic communities and island-based top predators. The overall aim is to establish an oceanographic observation and monitoring system directed by South African research institutions in support of South Africa’s needs – and where possible, the global requirements of the Southern Ocean Observation System (SOOS), CCAMLR, ACAP, etc., by documenting ship-board observations in the oceanic environment around the Prince Edward Islands in a holistic...

DOI: 10.15493/dea.mims.20210222
West Coast Hake Biomass Cruise on the Africana Voyage 010, June 1983

The West Coast Biomass Cruise was on the Africana Voyage 010 between the 17th June and 14th July 1983. Research was conducted from Orange River to Cape Agulhas along the coast of South Africa in order to survey, by means of trawling, the abundance of recruiting and adult hake.

DOI: 10.15493/DEA.MIMS.05252023
Processed CTD discrete observations from the West Coast Hake Biomass Survey on the Africana Voyage 059, February 1988

Here we present processed Conductivity-Temperature-Depth (CTD) discrete data from the upcast collected between 02 February and 25 February 1988, during the West Coast Hake Biomass Cruise on the Africana Voyage 059, in the southern part of 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 main objective of the cruise was to survey by means of trawling the abundance of adult and recruiting hake in South African waters; to investigate the diurnal cycle of hake and other demersal species; to make some experimental trawls in deep water to collect deep-water specimens of fish and squid; to collect routine biological material on demersal species from South West African waters; to investigate the occurence, distribution and abundance of squid and squid larvae;...

DOI: 10.15493/dea.mims.26052213
Sardine, Hake, and Anchovy Recruitment Programme (SHARP) / St. Helena Bay Monitoring Line (SHBML) on the Africana Voyage 280, February 2012

At the intiation of the original SARP project the operational objective was to investigate variability in the transport of clupeoid eggs and larvae by the Benguela jet current from the south coast spawning grounds to the west coast nursery area as this would impact recruitment, thereby influencing the abundance of pelagic resources. To date 17 years worth of data have been collected on a transect perpendicular to the coast off Slangkop, the SARP line. Many valuable conclusions have been drawn using the information. Though the SARP line has contributed to its initial goal, the wealth of data and knowledge accumulated over the years suggests it is time for a revamp and extension of the SARP line. The idea is to strengthen the sampling strategy to include a more comprehensive experimental design that not only targets clupeoid eggs and larvae but also the early life stages of another highly valuable fisheries-targeted resource, the Cape hakes (Marluccius capensis and M. Paradoxus), and...

(No DOI)
Preliminary processed SADCP data from the Gough Island Relief cruise on the SA Agulhas II Voyage 021, September 2016

This is processed Shipboard Acoustic Doppler Current Profiler (SADCP) data from the Gough Island Relief cruise on the SA Agulhas II Voyage 021, between 01 September 2016 and 06 October 2016. The Gough Island Relief Voyage is an annual cruise undertaken by the Department of Environmental Affairs (DEA) to change the overwintering team in Gough Island and to replenish the supplies at the British’s leased Gough Island Research base. The cruise also serves as a means to transport the residents and/or visitors to Tristan da Cunha using a signed agreement between South Africa and United Kingdom (UK). This voyage was to deliver the Gough 62 team to the island and return with the Gough 61 team. There was no scientific team onboard this voyage, however the Chief Navigations officer activated the ship mounted ADCP along the journey. 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...

DOI: 10.15493/dea.mims.26052230
South Coast Moorings and Monitoring Lines Cruise on the Algoa Voyage 213, December 2014

The South Coast Moorings and Monitoring Lines Cruise was conducted on the Algoa Voyage 213 on 1 to 19 December, 2014. Two data pods were released and recovered from (1) ADCP mooring and (2) CPIES deployed during the September 2013 Gough Cruise. Cape Recife ADCP current mooring was recovered. Four ADCP current moorings were recovered and serviced in Algoa Bay. Port St. Johns ADCP current mooring was recovered. Port St. Johns CTD/bongo survey lines were completed. DIC and pCO2 sampling was conducted along CTD transects. SVP drifters deployed in the Agulhas Current core. ALEX real-time surface buoy and current meter mooring of Port Edward deployed.Between 1988 and 2011, environmental and plankton sampling was conducted every summer along the South Coast during the annual pelagic spawner biomass surveys. Data collected during these cruises has provided valuable insight into environmental change in this region. There has been significant decline in copepod biomass on both the western...

(No DOI)
Preliminary processed CTD continuous observations from the Algoa Voyage 242, August 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 24 August 2017 and 30 August 2017, during Voyage 242 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. This dataset was processed using older standards which may not align with...

DOI: 10.15493/dea.mims.26052151
Processed Expendable Bathythermograph (XBT) casts collected during the 2014 Marion Relief Voyage on SA Agulhas Voyage 011

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 33 processed XBT casts collected in the South West Indian Ridge area and along the Crossroads Transect, between 15 April 2014 and 05 May 2014, during the 2014 Marion Relief Voyage.

DOI: 10.15493/dea.mims.26052225
South Coast Mooring Cruise on the Algoa Voyage 208, July 2014

The South Coast Mooring Cruise was conducted on the Algoa Voyage 208, 9 to 24 July 2014. Two ADCP current moorings and a thermistor chain were deployed along the Cape Point Monitoring line. Cape Recife ADCP current mooring was recovered. Four ADCP current moorings were recovered and serviced in Algoa Bay. Port St. Johns ADCP current mooring was recovered. Port St. Johns Conductivity, Temperature, Depth (CTD)/bongo survey lines were completed. SVP drifters in the Agulhas Current core were deployed. ALEX real-time surface buoy and current meter mooring of Port Edward were deployed.The South Coast Mooring Cruise had two scientific objectives: (1) Service, maintain and extend the in situ operational oceanography network currently deployed around South Africa and (2) to investigate the dynamics of the Port St Johns eddy and biological implications. Between 1988 and 2011, environmental and plankton sampling was conducted every summer along the South Coast during the annual pelagic...

(No DOI)
Preliminary processed CTD discrete observations from the Algoa Voyage 246, February 2018

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 CTD discrete data from the upcast collected between 15 February 2018 and 22 February 2018, during Voyage 246 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.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.26052264
Gough Island Relief on the SA Agulhas II Voyage 021, September 2016

The Gough Island Relief Voyage is an annual cruise undertaken by the Department of Environmental Affairs (DEA) to change the overwintering team in Gough Island and to replenish the supplies at the British’s leased Gough Island Research base. The cruise also serves as a means to transport the residents and/or visitors to Tristan da Cunha using a signed agreement between South Africa and United Kingdom (UK). This voyage was to deliver the Gough 62 team to the island and return with the Gough 61 team. The cruise was undertaken between 01 September 2016 and 06 October 2016. There was no scientific team onboard this voyage, however the Chief Navigations officer activated the ship mounted ADCP along the journey.

DOI: 10.15493/dea.mims.26052228
No Download
West Coast Cetacean Distribution and Abundance Survey on the Algoa Voyage 211, October 2014

The West Coast Cetacean Distribution and Abundance Survey was conducted on the Algoa Voyage 211, 28 October to 10 November 2014. The cruise operated on the shelf and slope regions off the West Coast of South Africa, between Dassen Island and Groenriviermond. The major objective of this cruise was to survey the abundance and distribution of cetaceans, in particular humpback whales, within the study area on the west coast. This objective, along with the research aims and proposed methodologies, are consistent with internationally accepted protocols. This work provided hands-on experience with logistical and technical cetacean specific problems associated with dedicated cetacean cruises. This work was a collaboration with the Mammal Research Institute, University of Pretoria, and the Department of Agriculture, Fisheries and Forestry.

739 datasets found Page 6 of 30

Geographic extent

Temporal extent