Please note that this is a staging site.
887 datasets found Page 16 of 36
DOI: 10.15493/DEA.MIMS.06122024
Processed Expendable Bathythermograph (XBT) casts from the Marion Island Relief Voyage on the SA Agulhas II Voyage 062, May 2024

Here we present 59 processed Expendable Bathythermograph (XBT) casts collected along the Crossroads Transect, between 13 May 2024 and 15 May 2024, during the during the 2024 Marion Relief Voyage on the SA Agulhas II Voyage 062. 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.

DOI: 10.15493/DEA.MIMS.14832023
South African National Antarctic Expedition (SANAE) on the SA Agulhas II Voyage 061, December 2023

The South African National Antarctic Expedition (SANAE) is an annual voyage undertaken by the Department of Forestry, Fisheries and the Environment (DFFE) to change the overwintering teams in Antarctica and to replenish the supplies at the SANAE IV Research base. This voyage was to deliver the SANAE 63 over wintering team to the research base and return with the SANAE 62 team. The cruise was undertaken between 26 December 2023 and 20 February 2024 with full scientific complement. For this voyage, the cruise track was adjusted to accommodate stop-overs at the Prince Edward Islands (PEI) on both the south bound transect and north bound transect to and from Antarctica. The main ship-based research objectives was to undertake underway sampling along the transects, which include XBT sampling between PEI and Antarctica; Underway PCO2; nutrient and chlorophyll sampling and the deployment of ARGO floats.

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.13622023
Processed underway Thermosalinograph (TSG) observations from SA Agulhas II Voyage 060, November 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 10 November and 29 November 2023 on the SA Agulhas II Voyage 060. 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.13602023
Processed underway Thermosalinograph (TSG) observations from SA Agulhas II Voyage 059, September 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 16 September 2023 and 17 October 2023 on the SA Agulhas II Voyage 059. 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.18042024
SEAmester and Agulhas System Climate Array (ASCA) Scientific Cruise on the SA Agulhas II Voyage 058, June 2023

The SEAmester and Agulhas System Climate Array (ASCA) Scientific Cruise was conducted on the SA Agulhas II Voyage 058 from 19 June 2023 to 29 June 2023. The cruise operated from Cape Town to the ASCA transect (~ 34° S) off Hamburg in the Eastern Cape, South West Indian Ocean. The objective of the SEAmester cruise was to undertake the ASCA transect across the Agulhas Current and sample the 20 CTD stations done previously. In addition, SEAmester shallow (200 m) CTD training stations took place each day at 10am and 4pm for student training.

DOI: 10.15493/DEA.MIMS.13582023
Processed underway Thermosalinograph (TSG) observations from the SEAmester and Agulhas System Climate Array (ASCA) Cruise on SA Agulhas II Voyage 058, June 2023

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 20 June and 29 June 2023 during the SEAmester and Agulhas System Climate Array (ASCA) Cruise on the SA Agulhas II Voyage 058. 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.11232023
Marion Island Relief Voyage on the SA Agulhas II Voyage 057, May 2023

The 2023 Marion Relief Voyage 057 offered the 11th opportunity to conduct multi-disciplinary, ship-based oceanographic research on board the SA Agulhas II en route to, from, and around, the sub-Antarctic Prince Edward Islands (PEIs). The ship-based research was conducted as a joint multi-institutional, multidisciplinary effort with scientists, research technicians, interns and students from the Department of Forestry, Fisheries and the Environment: Oceans & Coasts Research (DFFE-OCR), Department of Forestry, Fisheries and the Environment: Specialist Monitoring Services (DFFE-SMS), Bayworld Centre for Research and Education (BCRE), the University of Cape Town (UCT) and the University of Pretoria (UP), all collaborating to achieve a variety of research and monitoring project objectives. For the 2023 Relief voyage 19 scientists; students; technicians and interns participated on the voyage from the various institutes and universities.

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.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.14872023
South African National Antarctic Expedition (SANAE) on the SA Agulhas II Voyage 056, December 2022 - February 2023

The South African National Antarctic Expedition (SANAE) is an annual voyage undertaken by the Department of Forestry, Fisheries and the Environment (DFFE) to facilitate the overwintering team change at SANAE IV Research Base in Antarctica and replenish supplies. This voyage, SA Agulhas II Voyage 056, took place between 07 December 2022 and 13 February 2023, delivering the SANAE 62 overwintering team and returning with the SANAE 61 team. The primary ship based research objectives included underway sampling along the Good Hope transect from Cape Town to Antarctica and back, as well as hydrographic sampling and mooring recovery in the Maud Rise area as part of the South Atlantic Meridional Overturning Circulation (SAMOC) program.

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.09852023
Southern Ocean Seasonal Experiment 2022 (SCALE-WIN22) on the SA Agulhas II Voyage 053, July 2022

This cruise, conducted on the SA Agulhas II Voyage 053 in July 2022, 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 Southern Ocean. The seasonal cycle is an important mode of variability that couples the physical mechanisms of climate forcing to ecosystem response in phytoplankton diversity, primary production, and carbon export. Model simulations of the Southern Hemisphere tend to misestimate the magnitude and miss the timing of the Southern Ocean seasonal cycle both in terms of the seasonality of surface ocean warming and cooling, sea ice advancement/retreat, carbon dioxide exchanges and simulated primary production. Our capability to predict the ongoing shifts and future responses is therefore limited. This drives the need for more physical and biogeochemical data sets that...

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.01402023
Processed near-surface underway temperature and salinity (TSG) observations from the SEAmester and ASCA Scientific Cruise on the SA Agulhas II Voyage 052, June 2022

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected on the SEAmester and Agulhas System Climate Array (ASCA) Scientific Cruise on the SA Agulhas II Voyage 052 between 27 June and 07 July 2022. The cruise operated from Cape Town to the ASCA transect (~ 34°S) off Hamburg in the Eastern Cape, South West Indian Ocean. 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). The objective of the SEAmester cruise was...

DOI: 10.15493/DEA.MIMS.01122023
Marion Island Relief Voyage on the SA Agulhas II Voyage 051, March 2022

The Marion Island Relief Voyage was conducted on the SA Agulhas II Voyage 051 from 31 March to 23 May 2022. The 2022 Marion Relief Voyage 051 offered the 10th opportunity to conduct multi-disciplinary, ship-based oceanographic research on board the SA Agulhas II en route to, from, and around, the sub-Antarctic Prince Edward Islands (PEI’s). For the first time since the start of the global pandemic, 17 berths were allocated for ship-based scientists, but due to the helicopter logistics still being ship-based no additional research time was allocated and ship-based research was capped to 13 days before the voyage. This meant 10 days of research was allocated to the area around the PEI’s and 3 days allocated to the return leg to Cape Town, to enable the sampling of the Crossroads Transect. Thus, not all the approved NRF-funded SANAP projects could be accommodated. Similarly, annual ship-based research and long-term monitoring conducted by the Oceans & Coasts Research Branch of the...

DOI: 10.15493/DEA.MIMS.01432023
Processed Expendable Bathythermograph (XBT) casts collected during the 2022 Marion Relief Voyage on the SA Agulhas II Voyage 051, May 2022

Here we present 49 processed Expendable Bathythermograph (XBT) casts collected in the South West Indian Ridge area and along the Crossroads Transect, between 18 May 2022 and 21 May 2022, during the 2022 Marion Relief Voyage on the SA Agulhas II Voyage 051. 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.The 2022 Marion Relief Voyage 051 offered the 10th opportunity...

DOI: 10.15493/DEA.MIMS.01312023
Processed near-surface underway temperature and salinity (TSG) observations from the Marion Island Relief Voyage on the SA Agulhas II Voyage 051, March 2022

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 16 April 2022 and 22 May 2022 on the Marion Island Relief Voyage was conducted on the SA Agulhas II Voyage 051. 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). The 2022 Marion Relief Voyage 051 offered the 10th opportunity to conduct multi-disciplinary, ship-based oceanographic research on board the SA Agulhas II en route to, from, and around,...

DOI: 10.15493/DEA.MIMS.05312023
South African National Antarctic Expedition (SANAE) on the SA Agulhas II Voyage 049, November 2021

The South African National Antarctic Expedition (SANAE) is an annual voyage undertaken by the Department of Forestry, Fisheries and the Environment (DFFE) to change the overwintering teams in Antarctica and to replenish the supplies at the SANAE IV Research base. This voyage was to deliver the SANAE 61 over wintering team to the research base and return with the SANAE 60 team. The cruise was undertaken between 30 November 2021 and 28 January 2022 with full scientific complement. The main ship-based research objectives was to undertake underway sampling along the Good Hope transect from Cape Town to Antarctica and on the return leg from Antarctica to Cape Town and to complete hydrographic sampling and mooring deployments in the Muaid Rise area for the South Atlantic Meridional Overturning Circulation (SAMOC) and Southern Ocean Carbon and Heat Impact on Climate (SO-CHIC) research programs.

DOI: 10.15493/DEA.MIMS.01352023
Processed near-surface underway temperature and salinity (TSG) observations from SA Agulhas II Voyage 049, December 2021

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 03 December 2021 and 28 January 2022 during the South African National Antarctic Expedition (SANAE) cruise on the SA Agulhas II Voyage 049. 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). The South African National Antarctic Expedition (SANAE) is an annual voyage undertaken by the Department of Forestry, Fisheries and the Environment (DFFE) to...

DOI: 10.15493/DEA.MIMS.01102023
Marion Island Relief Voyage on the SA Agulhas II Voyage 045, May 2021

The Marion Island Relief Voyage was conducted on the SA Agulhas II Voyage 045 between 9 April and 12 May 2021. The 2021 Marion Relief Voyage 045 offered the 9th opportunity to conduct multi-disciplinary, ship-based oceanographic research on board the SA Agulhas II en-route to, from, and around, the sub-Antarctic Prince Edward Islands. Due to the world wide Covid-19 pandemic and the subsequent measures implemented by the South African government to contain the spread of the Covid-19 virus in South Africa, the main ship-based research objectives normally associated with the Marion relief voyage (as submitted through SANAP3 applications) were, like in 2020, once again curtailed. Thus, not all the approved NRF-funded SANAP projects could be accommodated. Similarly, annual ship-based research and monitoring conducted by the Oceans & Coasts Research Branch of DFFE was similarly substantially reduced. This was mainly due to the number of participants allowed to participate on the voyage...

DOI: 10.15493/DEA.MIMS.01372023
Processed near-surface underway Thermosalinograph (TSG) observations from the Marion Island Relief Voyage on the SA Agulhas II Voyage 045, May 2021

Here we present the 6-second resolution processed Thermosalinograph (TSG) data collected between 09 April 2021 and 12 May 2021 during the 2021 Marion Relief Voyage on the SA Agulhas II Voyage 045. 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). The 2021 Marion Relief Voyage 045 offered the 9th opportunity to conduct multi-disciplinary, ship-based oceanographic research on board the SA Agulhas II en-route to, from, and around, the...

DOI: 10.15493/DEA.MIMS.01162023
Processed Expendable Bathythermograph (XBT) casts collected during the Marion Island Relief Voyage on the SA Agulhas II Voyage 045, May 2021

Here we present 57 processed Expendable Bathythermograph (XBT) casts collected in the South West Indian Ridge area and along the Crossroads Transect, between 08 May 2021 and 11 May 2021, during the 2021 Marion Relief Voyage on the SA Agulhas II Voyage 045. 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. The 2021 Marion Relief Voyage 045 offered the 9th opportunity to conduct multi-disciplinary,...

DOI: 10.15493/dea.mims.26052160
Marion Island Relief Voyage on the SA Agulhas II Voyage 042, April 2020

The 2020 Marion Relief Voyage 042 on SA Agulhas II offered the 8th opportunity to conduct multi-disciplinary, ship-based oceanographic research on board the SA Agulhas II en route to, and around, the sub Antarctic Prince Edward Islands. Due to the world wide Covid-19 pandemic and the subsequent measures implemented by the South African government to contain the spread of the Covid-19 virus in South Africa, the main research objectives (land-based and ship-based) normally associated with the Marion Relief voyage (as submitted through SANAP3 applications) were cancelled. This cruise was comprised mainly of underway sampling.

DOI: 10.15493/dea.mims.26052162
Processed Expendable Bathythermograph (XBT) casts collected during the 2020 Marion Relief Voyage on SA Agulhas Voyage 042

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 47 processed XBT casts collected along the Crossroads Transect, between 13 May 2020 and 15 May 2020, during the 2020 Marion Relief Voyage.

887 datasets found Page 16 of 36

Geographic extent

Temporal extent