RRS Sir David Attenborough SD046
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Sir David Attenborough (FKAD) |
| Cruise identifier | SD046 |
| Cruise period | 2025-02-05 — 2025-03-28 |
| Status | Completed |
| Port of departure | Punta Arenas, Chile |
| Port of return | Mare Harbour, Falkland Islands (Malvinas) |
| Purpose | Research |
| Objectives | SD046 is a multidisciplinary science cruise aboard the RRS Sir David Attenborough collecting data and samples in four distinct phases: 1) South Georgia, 2) A23 transect and 3) BIOPOLE and 4) A23a iceberg. The South Georgia phase (SG) comprised of the Western Core Box transects, two benthic stations and mooring work at the sites P3, Western Core Box and Eastern Core Box. The A23 transect phase (A23) consisted of oceanographic measurements at predefined transect points and mooring work at the South Sandwich Trench sites SSC and SST. The BIOPOLE phase (BP) consisted of several stations with intensive biological net and trawl sampling and mooring work at the sites M2, M3, OP1, OP2, OP3 and OP5. The iceberg A23a phase (iceberg) sampled underway, plankton community and sea surface ice, and conducted oceanographic measurements around the grounded A23a iceberg. Furthermore, sampling from the uncontaminated seawater system and marine mammal efforts took place in all cruise phases. Several onboard experiments have been conducted using subsamples or individual organisms taken from the acquired samples.
The BIOPOLE phase aims to investigate how nutrients in polar waters drive the global carbon cycle and primary productivity in ocean. Measurements were made for determining ocean circulation and the tracing of nutrient sources to examine the coupling between physical, biogeochemical, and ecological processes during the austral autumn in the area of Powell Basin extending vertically from the surface through the upper water column, the Mixed Layer Depth, into the upper layers of the Circumpolar Deep Water. The South Georgia phase aims to undertake sampling as part of the POETS Western Core Box, to understand the long-term variability of the marine ecosystem, in particular krill biomass, at South Georgia, to assess mesoscale distribution and abundance of macro-zooplankton and micronekton, and the physical environment they are within at South Georgia, South Atlantic, from 1996 onwards. Furthermore, benthic community composition was analysed at two South Georgia stations. The A23 repeat transect phase aims to understand warming trends in the dense Antarctic Bottom Water and underlying causes, and to uncouple interannual variability from the long-term warming trend. The A23a iceberg sampling phase aims to determine the impact on physical and biogeochemical conditions as well as planktonic and benthic community composition, complementing previous iceberg sampling, e.g. A76a (2023), A68a (2021) or A23a (2023). |
| Chief scientist | Geraint Tarling (British Antarctic Survey), Sophie Fielding (British Antarctic Survey) |
| Project | BIOPOLE; POETS-WCB |
| Coordinating body | British Antarctic Survey (BAS) |
| Cruise report |  (41.36 MB) |
| Ocean/sea areas | |
| General | Southern Ocean Unknown |
| Specific | Southern Ocean, Weddell Sea, Scotia Sea |
| Track charts | (1.23 MB) |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: activity duration in days = 51 Description: Routine underway measurements of position, heading, speed from GPS/gyro/log; temperature, salinity, chlorophyll-a fluorescence, optical beam transmission from uncontaminated seawater supply and sensors under hull; air temperature, humidity, sea level pressure, wind speed and direction, solar radiation; |
| Water bottle stations | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| CTD stations | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| CTD stations | Quantity: number of deployments = 9 Description: Teledyne Rapid Cast CTD |
| Transparency (eg transmissometer) | Quantity: activity duration in days = 51 Description: Routine underway measurements of position, heading, speed from GPS/gyro/log; temperature, salinity, chlorophyll-a fluorescence, optical beam transmission from uncontaminated seawater supply and sensors under hull; air temperature, humidity, sea level pressure, wind speed and direction, solar radiation; |
| Transparency (eg transmissometer) | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Current profiler (eg ADCP) | Quantity: number of deployments = 71 Description: Lowered Acoustic Doppler Current Profiler (LADCP) recording current velocities, signal return and error in the velocity measured; 300kHz (upward) and 300kHz (downward), free-pinging with no synchronisation between instruments. |
| Current profiler (eg ADCP) | Quantity: activity duration in days = 49 Description: Vessel-Mounted Acoustic Doppler Current Profiler measurements (VMADCP) 75 kHz (12 days) and 150 kHz (18 days). |
| Other physical oceanographic measurements | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Chemical oceanography | |
| Oxygen | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Oxygen | Quantity: number of samples = 1362 Description: Underway water samples for for DOC, DIC, POC/TOC/BSI, Si isotopes; nutrients; black carbon; chlorophyll/Lugol's; d18O; salinity and POM. |
| Other dissolved gases | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Silicate | Quantity: number of samples = 1362 Description: Underway water samples for for DOC, DIC, POC/TOC/BSI, Si isotopes; nutrients; black carbon; chlorophyll/Lugol's; d18O; salinity and POM. |
| Silicate | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Alkalinity | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Isotopes | Quantity: number of samples = 1362 Description: Underway water samples for for DOC, DIC, POC/TOC/BSI, Si isotopes; nutrients; black carbon; chlorophyll/Lugol's; d18O; salinity and POM. |
| Isotopes | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Other chemical oceanographic measurements | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Other chemical oceanographic measurements | Quantity: number of samples = 1362 Description: Underway water samples for for DOC, DIC, POC/TOC/BSI, Si isotopes; nutrients; black carbon; chlorophyll/Lugol's; d18O; salinity and POM. |
| Contamination | |
| Other contaminant measurements | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: activity duration in days = 51 Description: Routine underway measurements of position, heading, speed from GPS/gyro/log; temperature, salinity, chlorophyll-a fluorescence, optical beam transmission from uncontaminated seawater supply and sensors under hull; air temperature, humidity, sea level pressure, wind speed and direction, solar radiation; |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 1362 Description: Underway water samples for for DOC, DIC, POC/TOC/BSI, Si isotopes; nutrients; black carbon; chlorophyll/Lugol's; d18O; salinity and POM. |
| Particulate organic matter (inc POC, PON) | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Particulate organic matter (inc POC, PON) | Quantity: number of samples = 1362 Description: Underway water samples for for DOC, DIC, POC/TOC/BSI, Si isotopes; nutrients; black carbon; chlorophyll/Lugol's; d18O; salinity and POM. |
| Dissolved organic matter (inc DOC) | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Dissolved organic matter (inc DOC) | Quantity: number of samples = 1362 Description: Underway water samples for for DOC, DIC, POC/TOC/BSI, Si isotopes; nutrients; black carbon; chlorophyll/Lugol's; d18O; salinity and POM. |
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of deployments = 17 Description: Mammoth net collected meso-zooplankton; using 300µm mesh. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of deployments = 50 Description: Bongo net, mesh sizes 100µm–200µm. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of deployments = 9 Description: Epibenthic sledge towed along the seabed to stir up the top layer of sediment and collect organisms living just above the seafloor. |
| Phytoplankton | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Zooplankton | Quantity: number of deployments = 4 Description: Mocness net collected zooplankton community up to the depth of 1000m using 300µm mesh |
| Zooplankton | Quantity: number of deployments = 16 Description: RMT8 pelagic trawl system consisting of two nets with a mouth opening of 8 m^2 and 4 mm mesh. Mainly used to catch krill and macrozooplankton. |
| Zooplankton | Quantity: number of deployments = 50 Description: Bongo net, mesh sizes 100µm–200µm. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Zooplankton | Quantity: number of deployments = 17 Description: Mammoth net collected meso-zooplankton; using 300µm mesh. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Eggs and larvae | Quantity: number of deployments = 16 Description: RMT8 pelagic trawl system consisting of two nets with a mouth opening of 8 m^2 and 4 mm mesh. Mainly used to catch krill and macrozooplankton. |
| Eggs and larvae | Quantity: number of deployments = 4 Description: Mocness net collected zooplankton community up to the depth of 1000m using 300µm mesh |
| Eggs and larvae | Quantity: number of deployments = 17 Description: Mammoth net collected meso-zooplankton; using 300µm mesh. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Eggs and larvae | Quantity: number of deployments = 50 Description: Bongo net, mesh sizes 100µm–200µm. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Zoobenthos | Quantity: number of deployments = 11 Description: Agassiz trawl heavy collected samples of organisms living on or just above the seafloor. |
| Zoobenthos | Quantity: number of deployments = 9 Description: Epibenthic sledge towed along the seabed to stir up the top layer of sediment and collect organisms living just above the seafloor. |
| Mammals and reptiles | Quantity: number of track lines = 76 Description: Marine Mammal Observations |
| Pelagic fish | Quantity: number of deployments = 16 Description: RMT8 pelagic trawl system consisting of two nets with a mouth opening of 8 m^2 and 4 mm mesh. Mainly used to catch krill and macrozooplankton. |
| Pelagic fish | Quantity: number of deployments = 17 Description: Mammoth net collected meso-zooplankton; using 300µm mesh. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Pelagic fish | Quantity: number of deployments = 4 Description: Mocness net collected zooplankton community up to the depth of 1000m using 300µm mesh |
| Demersal fish | Quantity: number of deployments = 11 Description: Agassiz trawl heavy collected samples of organisms living on or just above the seafloor. |
| Demersal fish | Quantity: number of deployments = 9 Description: Epibenthic sledge towed along the seabed to stir up the top layer of sediment and collect organisms living just above the seafloor. |
| Molluscs | Quantity: number of deployments = 11 Description: Agassiz trawl heavy collected samples of organisms living on or just above the seafloor. |
| Molluscs | Quantity: number of deployments = 9 Description: Epibenthic sledge towed along the seabed to stir up the top layer of sediment and collect organisms living just above the seafloor. |
| Crustaceans | Quantity: number of deployments = 4 Description: Mocness net collected zooplankton community up to the depth of 1000m using 300µm mesh |
| Crustaceans | Quantity: number of deployments = 17 Description: Mammoth net collected meso-zooplankton; using 300µm mesh. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Crustaceans | Quantity: number of deployments = 16 Description: RMT8 pelagic trawl system consisting of two nets with a mouth opening of 8 m^2 and 4 mm mesh. Mainly used to catch krill and macrozooplankton. |
| Acoustic reflection on marine organisms. | Quantity: activity duration in days = 50 Description: Simrad EK80 bioacoustic echosounder |
| Other biological/fisheries measurement | Quantity: number of deployments = 71 Description: Conductivity-temperature-depth casts recording temperature, conductivity, dissolved oxygen, pressure, chlorophyll-a fluorescence, altitude above seabed, backscatter, optical beam transmission. Water samples were collected on some casts for analysis of Seawater collected using Niskin were used to sample for salts, dissolved oxygen, dissolves nutrients, dissolved inorganic carbon and total alkalinity (DIC/TA), silicon isotopes (d30Si), oxygen isotopes (d18O), dissolved organic carbon (DOC), particulate organic carbon (POC), total organic carbon (TOC), biogenic silica (BSi), chlorophyll-a/Lugol’s, phyto- experiments, particulate organic matter (POM), black carbon, eDNA, grazing and microplastics |
| Other biological/fisheries measurement | Quantity: number of deployments = 16 Description: RMT8 pelagic trawl system consisting of two nets with a mouth opening of 8 m^2 and 4 mm mesh. Mainly used to catch krill and macrozooplankton. |
| Other biological/fisheries measurement | Quantity: number of deployments = 4 Description: Mocness net collected zooplankton community up to the depth of 1000m using 300µm mesh |
| Other biological/fisheries measurement | Quantity: number of deployments = 17 Description: Mammoth net collected meso-zooplankton; using 300µm mesh. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Other biological/fisheries measurement | Quantity: number of deployments = 50 Description: Bongo net, mesh sizes 100µm–200µm. Sampled copepods, meso-zooplankton for zooplankton community analysis and copepod incubation experiments. |
| Meteorology | |
| Routine standard measurements | Quantity: activity duration in days = 51 Description: Routine underway measurements of position, heading, speed from GPS/gyro/log; temperature, salinity, chlorophyll-a fluorescence, optical beam transmission from uncontaminated seawater supply and sensors under hull; air temperature, humidity, sea level pressure, wind speed and direction, solar radiation; |
| Atmospheric chemistry | Quantity: activity duration in days = 19 Description: i-Dirac gas chromatograph for long-term measurements of selected halocarbons in the atmosphere |
| Other meteorological measurements | Quantity: activity duration in days = 51 Description: Eddy covariance CO2 flux system consisting of Picarro gas concentration analyser, Metek uSonic3 ultrasonic anemometer and LPMS motion reference unit |
| Geology and geophysics | |
| Single-beam echosounding | Quantity: activity duration in days = 51 Description: EA640 singlebeam echosounder recording. |
| Multi-beam echosounding | Quantity: activity duration in days = 16 Description: EM124 multibeam echosounder recording. |
| Multi-beam echosounding | Quantity: activity duration in days = 13 Description: Simrad ME70 multibeam echosounder |
| Gravity measurements | Quantity: activity duration in days = 50 Description: Opportunistic gravity meter measurements. |
| Other geological/geophysical measurements | Quantity: activity duration in days = 50 Description: Rutter Sigma s6 WaMoS II wave radar directional radar measuring wave and surface current parameters |
| Moorings, landers, buoys | |
| Physical oceanography | |
| CTD stations | 60° 13' 5" S 25° 7' 13" W — Site: SSTC, recovery: 24/02/2025 (event number 83), not re-deployed, water depth: ~5850m, instrumentation: SBE37 SM CTD, Aquadopp 6000 3D Doppler current meter, RBRsoloT |
| CTD stations | 60° 38' 28" S 42° 10' 41" W — Site: OP2, recovery: 03/03/2025 (event number 112), no instruments recovered (broken wire), deployment: 17/03/2025 (event number 185), water depth: ~3200m, instrumentation: SBE 37 SM CTD, SBE 39 TR, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| CTD stations | 60° 36' 53" S 41° 58' 36" W — Site: OP5, recovery: 04/03/2025 (event number 119), deployment: 18/03/2025 (event number 192), water depth: ~3400m, instrumentation: SBE 37 SMP CTD, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| CTD stations | 60° 39' 19" S 42° 13' 29" W — Site: OP3, recovery: 03/03/2025 (event number 110), not re-deployed, water depth: ~1800m, instrumentation: SBE37 SM CTD, SBE39 TR, Aquadopp 6000 3D Doppler current meter |
| CTD stations | 60° 6' 0" S 25° 17' 57" W — Site: SSTW, recovery: 25/02/2025 (event number 86), partially recovered (SBE37 SM CTD not recovered), not re-deployed, water depth: ~4380m, instrumentation: SBE37 SM CTD, SBE39 TR, Aquadopp 6000 3D Doppler current meter |
| CTD stations | 63° 29' 50" S 41° 47' 51" W — Site: M3, recovery: 14/03/2025 (event number 168), deployment: 14/03/2025 (event number 169), water depth: ~4600m, instrumentation: SBE37 SMP CTD, SBE39 TR, Aquadopp 6000 Doppler current meter |
| CTD stations | 60° 37' 25" S 42° 5' 29" W — Site: OP1, recovery: 03/03/2025 (event number 111), not recovered (only release remained), deployment: 18/03/2025 (event number 190), water depth: ~3600m, instrumentation: SBE 37 SM CTD, SBE 39 TR, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| Current meters | 60° 38' 28" S 42° 10' 41" W — Site: OP2, recovery: 03/03/2025 (event number 112), no instruments recovered (broken wire), deployment: 17/03/2025 (event number 185), water depth: ~3200m, instrumentation: SBE 37 SM CTD, SBE 39 TR, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| Current meters | 60° 39' 19" S 42° 13' 29" W — Site: OP3, recovery: 03/03/2025 (event number 110), not re-deployed, water depth: ~1800m, instrumentation: SBE37 SM CTD, SBE39 TR, Aquadopp 6000 3D Doppler current meter |
| Current meters | 60° 36' 53" S 41° 58' 36" W — Site: OP5, recovery: 04/03/2025 (event number 119), deployment: 18/03/2025 (event number 192), water depth: ~3400m, instrumentation: SBE 37 SMP CTD, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| Current meters | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Current meters | 63° 29' 50" S 41° 47' 51" W — Site: M3, recovery: 14/03/2025 (event number 168), deployment: 14/03/2025 (event number 169), water depth: ~4600m, instrumentation: SBE37 SMP CTD, SBE39 TR, Aquadopp 6000 Doppler current meter |
| Current meters | 60° 13' 5" S 25° 7' 13" W — Site: SSTC, recovery: 24/02/2025 (event number 83), not re-deployed, water depth: ~5850m, instrumentation: SBE37 SM CTD, Aquadopp 6000 3D Doppler current meter, RBRsoloT |
| Current meters | 60° 6' 0" S 25° 17' 57" W — Site: SSTW, recovery: 25/02/2025 (event number 86), partially recovered (SBE37 SM CTD not recovered), not re-deployed, water depth: ~4380m, instrumentation: SBE37 SM CTD, SBE39 TR, Aquadopp 6000 3D Doppler current meter |
| Current meters | 60° 37' 25" S 42° 5' 29" W — Site: OP1, recovery: 03/03/2025 (event number 111), not recovered (only release remained), deployment: 18/03/2025 (event number 190), water depth: ~3600m, instrumentation: SBE 37 SM CTD, SBE 39 TR, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| Current meters | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Current profiler (eg ADCP) | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Current profiler (eg ADCP) | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Current profiler (eg ADCP) | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Current profiler (eg ADCP) | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Other physical oceanographic measurements | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Other physical oceanographic measurements | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Other physical oceanographic measurements | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Other physical oceanographic measurements | 63° 29' 50" S 41° 47' 51" W — Site: M3, recovery: 14/03/2025 (event number 168), deployment: 14/03/2025 (event number 169), water depth: ~4600m, instrumentation: SBE37 SMP CTD, SBE39 TR, Aquadopp 6000 Doppler current meter |
| Other physical oceanographic measurements | 60° 36' 53" S 41° 58' 36" W — Site: OP5, recovery: 04/03/2025 (event number 119), deployment: 18/03/2025 (event number 192), water depth: ~3400m, instrumentation: SBE 37 SMP CTD, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| Other physical oceanographic measurements | 60° 39' 19" S 42° 13' 29" W — Site: OP3, recovery: 03/03/2025 (event number 110), not re-deployed, water depth: ~1800m, instrumentation: SBE37 SM CTD, SBE39 TR, Aquadopp 6000 3D Doppler current meter |
| Other physical oceanographic measurements | 60° 38' 28" S 42° 10' 41" W — Site: OP2, recovery: 03/03/2025 (event number 112), no instruments recovered (broken wire), deployment: 17/03/2025 (event number 185), water depth: ~3200m, instrumentation: SBE 37 SM CTD, SBE 39 TR, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| Other physical oceanographic measurements | 60° 37' 25" S 42° 5' 29" W — Site: OP1, recovery: 03/03/2025 (event number 111), not recovered (only release remained), deployment: 18/03/2025 (event number 190), water depth: ~3600m, instrumentation: SBE 37 SM CTD, SBE 39 TR, Aquadopp 6000 3D Doppler current meter, RBR soloT |
| Other physical oceanographic measurements | 60° 6' 0" S 25° 17' 57" W — Site: SSTW, recovery: 25/02/2025 (event number 86), partially recovered (SBE37 SM CTD not recovered), not re-deployed, water depth: ~4380m, instrumentation: SBE37 SM CTD, SBE39 TR, Aquadopp 6000 3D Doppler current meter |
| Other physical oceanographic measurements | 60° 13' 5" S 25° 7' 13" W — Site: SSTC, recovery: 24/02/2025 (event number 83), not re-deployed, water depth: ~5850m, instrumentation: SBE37 SM CTD, Aquadopp 6000 3D Doppler current meter, RBRsoloT |
| Other physical oceanographic measurements | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Chemical oceanography | |
| Oxygen | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Oxygen | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Contamination | |
| Other contaminant measurements | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Biology and fisheries | |
| Particulate organic matter (inc POC, PON) | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Particulate organic matter (inc POC, PON) | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Particulate organic matter (inc POC, PON) | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Particulate organic matter (inc POC, PON) | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Sediment traps | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Sediment traps | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Sediment traps | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Sediment traps | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Phytoplankton | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Phytoplankton | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Phytoplankton | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Phytoplankton | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Zooplankton | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Zooplankton | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Zooplankton | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Zooplankton | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Acoustic reflection on marine organisms. | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Acoustic reflection on marine organisms. | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Other biological/fisheries measurement | 52° 51' 34" S 40° 5' 21" W — Site: P3, recovery: 09/02/2025 (event number 10), deployment: 22/03/2025 (event number 206), water depth: ~3780m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 CTD, OPIC – plastic sampler, Phytoplankton sampler, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Other biological/fisheries measurement | 54° 6' 12" S 36° 14' 24" W — Site: ECB, recovery 13/02/2025 (event number 23), deployment: 20/02/2025 (event number 64), water depth: ~270m, instrumentation: SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
| Other biological/fisheries measurement | 62° 7' 20" S 50° 29' 41" W — Site: BIOPOLE, recovery 08/03/2025 (event number 139), not re-deployed, water depth: 3383m, instrumentation: 300kHz RDI Workhorse Sentinel ADCP, SBE37 SMP CTD, McLane sediment trap, Seaguard Current Meter and O2 sensor |
| Other biological/fisheries measurement | 53° 47' 44" S 37° 56' 34" W — Site: WCB, recovery 10/02/2025 (event number 14), deployment: 18/02/2025 (event number 52), water depth: ~320m, instrumentation: SBE37 CTD, SBE37 SMP CTD, 300kHz RDI Workhorse Sentinel ADCP, Simrad WBAT echosounder, McLane sediment trap, Aquadopp Doppler current profiler, Sonovault passive acoustic hydrophone |
