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RRS Discovery DY157 (AMT30)

Cruise summary report

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Cruise Info. 
Ship name (ship code)RRS Discovery (74EQ)
Cruise identifierDY157 (AMT30)
Cruise period2023-02-20 — 2023-03-30
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnSouthampton, United Kingdom
PurposeResearch
ObjectivesThe overall aim of the Atlantic Meridional Transect programme is: to quantify key biogeochemical and ecosystem processes and their inherent variability over extended time and spatial scales in the Atlantic Ocean. This is achieved by executing an annually repeated meridional transect through contrasting oceanic provinces, ranging from oligotrophic deserts, to highly productive shelf seas.

The specific objectives of AMT are:
- To quantify the nature and causes of ecological and biogeochemical variability in planktonic ecosystems;
- To quantify the effects of this variability on nutrient cycling, on biogenic export and on air-sea exchange of climate active gases;
- To construct multi-decadal, multidisciplinary ocean time-series which are integrated within a wider "Pole-to-pole" observatory concept;
- To provide essential sea-truth validation for current and next generation satellite missions;
- To provide essential data for global ecosystem model development and validation;
- To provide a valuable, highly sought after and unique training arena for the next generation of UK and International oceanographers.
Chief scientistAndrew Rees (Plymouth Marine Laboratory)
ProjectAtlantic Meridional Transect (AMT)
Cruise reportRRS Discovery DY157 (AMT30) cruise report dy157.pdf (5.60 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
South Atlantic Ocean
Track chartsRRS Discovery DY157 (AMT30) cruise track — dy157trk.pdf (0.19 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 56
Description: CTD profiles (salinity, temperature, oxygen concentration, fluorescence, transmittance, down-welling PAR, backscatter).
Subsurface temperature and salinity measurementsQuantity: activity duration in days = 28
Description: The automated Gas Transfer Efficiency system was set up in the Met Lab with continuous underway flow, to estimate the efficiency of gas transfer through the underway water 24 hours per day while operational. Discrete sea-surface microlayer, subsurface water, deep chlorophyll maximum and 400 m depth samples were processed through this system on an approximate daily basis.
Optics (eg underwater light levels)Quantity: activity duration in days = 30
Description: Above-water Seabird HyperSAS system radiometric measurements of remote sensing reflectance.
Optics (eg underwater light levels)Quantity: activity duration in days = 15
Description: Continuous underway measurements of particulate and dissolved absorption coefficients, backscattering coefficients, CTD temperature and salinity.
Optics (eg underwater light levels)Quantity: number of profiles = 24
Description: CTD and particulate and dissolved absorption coefficients from the PML optics (IOP) profiler.
Optics (eg underwater light levels)Quantity: number of samples = 113
Description: Total samples of absorption spectra by seawater at two depths
Optics (eg underwater light levels)Quantity: number of samples = 136
Description: Total samples of absorption spectra by seawater in Point Source Integrating Cavity Absorption Meter (PSICAM)
Optics (eg underwater light levels)Quantity: activity duration in days = 27
Description: Continuously recording underway measurement of backscattering at wavelengths from 430nm to 700nm
Other physical oceanographic measurementsQuantity: number of profiles = 51
Description: Turbulence profiles (0 - 200m) were collected by MSS-90
Chemical oceanography 
Carbon dioxideQuantity: number of samples = 29
Description: 1.5-4.5 L samples collected (volume dependent on wind and sea conditions) with manual deployment of a Garrett Screen at all solar noon stations. All 29 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA; 23 of these samples were processed through the Gas Transfer Efficiency system.
Carbon dioxideQuantity: number of samples = 10
Description: 1.5-3.0 L samples collected from 10 solar noon stations, with manual deployment of a Garrett Screen. These samples were pooled with the primary SML sample after all aliquots for the above listed biogeochemical analyses had been collected. An aliquot from the pooled sample will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents). The remainder of each pooled sample was processed through the Gas Transfer Efficiency system (included in the total 23 primary samples).
Carbon dioxideQuantity: number of samples = 23
Description: 5 L samples (~30 cm depth) collected with on 23 solar noon stations using a peristaltic pump deployed manually over the side of the ship. All 23 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each sample was processed through the Gas Transfer Efficiency system.
Carbon dioxideQuantity: number of samples = 29
Description: 2-9 L samples collected while on solar noon station from CTD Niskin bottles at 5 m depth (3 stations), the deep chlorophyll maximum (22 stations) and 400 m depth (22 stations). All 28 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each deep chlorophyll maximum and 400 m samples were processed through the Gas Transfer Efficiency system.
Carbon dioxideQuantity: activity duration in days = 28
Description: The automated Gas Transfer Efficiency system was set up in the Met Lab with continuous underway flow, to estimate the efficiency of gas transfer through the underway water 24 hours per day while operational. Discrete sea-surface microlayer, subsurface water, deep chlorophyll maximum and 400 m depth samples were processed through this system on an approximate daily basis.
PhosphateQuantity: number of samples = 1343
Description: Micro-molar nutrient (nitrate, nitrite, phosphate, silicate) analysis carried out using a 4 channel Bran & Luebbe AAIII segmented flow, colourimetric, auto-analyser.
NitrateQuantity: number of samples = 1343
Description: Micro-molar nutrient (nitrate, nitrite, phosphate, silicate) analysis carried out using a 4 channel Bran & Luebbe AAIII segmented flow, colourimetric, auto-analyser.
AlkalinityQuantity: number of samples = 52
Description: Samples for analysis of Total alkalinityfrom pre-dawn CTD stations
pHQuantity: number of samples = 1008
Description: Samples for analysis of Total pH
IsotopesQuantity: number of samples = 827
Description: Seawater samples (includes subsamples) taken from noon CTD Niskin bottles every three days, incubated on deck for 3-6 or 2-4 days. Samples will be used for isotopic analysis and iodine concentration as it relates to iodine oxidation and reduction.
IsotopesQuantity: number of samples = 552
Description: 60ml samples from every depth were filtered in line from the CTD and frozen. These will be analysed for nitrogen isotopes of nitrate and Dissolved Organic Nitrogen (DON).
IsotopesQuantity: number of samples = 141
Description: 2-13L of water from five depths of the CTD were collected and vacuum filtered through a 0.7µm GFF and the filters collected and immediately frozen. These will be analysed for isotopic values of PON and POC.
IsotopesQuantity: number of samples = 60
Description: 5 L of samples filtered through Acropak capsule (0.45 ?m pore size) from CTD Niskin bottles at 12 selected stations with 5 depths (5, 25, 100, 200, 500m) at each, with either 25 m or 100 m one replaced by the depth of deep chlorophyll maximum. For determination of Thorium isotopes.
Other chemical oceanographic measurementsQuantity: number of samples = 174
Description: 250 mL of seawater samples were collected from 27 pre-dawn and 2 noon stations. Water samples were collected from the CTD Niskin bottles and 2 depths (surface and DCM). 16 mL of samples were acidified in 20 mL glass vials for total DMSP and related metabolites. 6-7 mL of samples were filtered for size fractionated DMSP and related metabolites through 3.0 µm and 0.2 µm and filters were kept in 20 mL glass vials with acidified 8 mL MilliQ.
Other chemical oceanographic measurementsQuantity: number of samples = 1343
Description: Micro-molar nutrient (nitrate, nitrite, phosphate, silicate) analysis carried out using a 4 channel Bran & Luebbe AAIII segmented flow, colourimetric, auto-analyser.
Other chemical oceanographic measurementsQuantity: number of samples = 60
Description: Samples for analysis of Total Dissolved Inorganic Carbon (DIC) from noon CTD stations
Other chemical oceanographic measurementsQuantity: number of samples = 827
Description: Seawater samples (includes subsamples) taken from noon CTD Niskin bottles every three days, incubated on deck for 3-6 or 2-4 days. Samples will be used for isotopic analysis and iodine concentration as it relates to iodine oxidation and reduction.
Other chemical oceanographic measurementsQuantity: number of samples = 189
Description: 125ml samples from six depths were collected from the CTD and syringe filtered into acidified 22ml vials and refrigerated for future DON and DOC concentration measurements.
Other chemical oceanographic measurementsQuantity: number of samples = 146
Description: 60ml from four to six depths was also syringe filtered from the 125ml bottles and frozen for future DOP concentration measurements.
Contamination 
Suspended matterQuantity: number of samples = 82
Description: Duplicate samples for particulate inorganic carbon (PIC)
Suspended matterQuantity: number of samples = 96
Description: Duplicate samples for total suspended matter (TSM) concentration.
Biology and fisheries 
Primary productivityQuantity: number of samples = 21
Description: Incubations for carbon fixation rates using 14C for 3 depths: surface, DCM and 0.1% each noon CTD,
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 52
Description: 100 L water samples collected from marine snow catcher (MSC) (usually) at mixed layer depth + 10m and mixed layer depth + 100m; 4 x 3.5 L for different types of particles (suspended, slow-sinking, fast-sinking and marine snow) were filtered for POC, BSi, PIC and Chl-a analysis.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 180
Description: Samples for High-Performance Liquid Chromatography (HPLC) post-cruise analysis. Surface and DCM each pre-dawn and noon CTD; underway 3xday to PML/NASA
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 113
Description: Samples for High-Performance Liquid Chromatography (HPLC) post-cruise analysis. Surface and DCM each pre-dawn and noon CTD to ULisbon
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 65
Description: Samples for phytoplankton absorption coefficients post-cruise analysis. Surface, DCM and 0.1% each noon CTD
Particulate organic matter (inc POC, PON)Quantity: number of samples = 52
Description: 100 L water samples collected from marine snow catcher (MSC) (usually) at mixed layer depth + 10m and mixed layer depth + 100m; 4 x 3.5 L for different types of particles (suspended, slow-sinking, fast-sinking and marine snow) were filtered for POC, BSi, PIC and Chl-a analysis.
Particulate organic matter (inc POC, PON)Quantity: number of samples = 116
Description: Duplicate samples for spectral absorption by particles (ap) collected onto GF-75 filters
Particulate organic matter (inc POC, PON)Quantity: number of samples = 60
Description: Single 250mL water samples for spectral absorption by chromophoric dissolved organic matter (CDOM; ag)
Particulate organic matter (inc POC, PON)Quantity: number of samples = 240
Description: Duplicate samples, including duplicate filtrate blanks, for particulate organic carbon (POC) concentration
Dissolved organic matter (inc DOC)Quantity: number of samples = 29
Description: 1.5-4.5 L samples collected (volume dependent on wind and sea conditions) with manual deployment of a Garrett Screen at all solar noon stations. All 29 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA; 23 of these samples were processed through the Gas Transfer Efficiency system.
Dissolved organic matter (inc DOC)Quantity: number of samples = 10
Description: 1.5-3.0 L samples collected from 10 solar noon stations, with manual deployment of a Garrett Screen. These samples were pooled with the primary SML sample after all aliquots for the above listed biogeochemical analyses had been collected. An aliquot from the pooled sample will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents). The remainder of each pooled sample was processed through the Gas Transfer Efficiency system (included in the total 23 primary samples).
Dissolved organic matter (inc DOC)Quantity: number of samples = 23
Description: 5 L samples (~30 cm depth) collected with on 23 solar noon stations using a peristaltic pump deployed manually over the side of the ship. All 23 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each sample was processed through the Gas Transfer Efficiency system.
Dissolved organic matter (inc DOC)Quantity: number of samples = 29
Description: 5 L samples collected while on 28 solar noon stations (six from the Deck Lab; 22 from the Met Lab). All 28 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each sample was processed through the Gas Transfer Efficiency system.
Dissolved organic matter (inc DOC)Quantity: number of samples = 29
Description: 2-9 L samples collected while on solar noon station from CTD Niskin bottles at 5 m depth (3 stations), the deep chlorophyll maximum (22 stations) and 400 m depth (22 stations). All 28 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each deep chlorophyll maximum and 400 m samples were processed through the Gas Transfer Efficiency system.
Dissolved organic matter (inc DOC)Quantity: number of samples = 120
Description: Duplicate samples for concentration of dissolved organic carbon (DOC)
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 29
Description: 1.5-4.5 L samples collected (volume dependent on wind and sea conditions) with manual deployment of a Garrett Screen at all solar noon stations. All 29 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA; 23 of these samples were processed through the Gas Transfer Efficiency system.
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 23
Description: 5 L samples (~30 cm depth) collected with on 23 solar noon stations using a peristaltic pump deployed manually over the side of the ship. All 23 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each sample was processed through the Gas Transfer Efficiency system.
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 29
Description: 5 L samples collected while on 28 solar noon stations (six from the Deck Lab; 22 from the Met Lab). All 28 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each sample was processed through the Gas Transfer Efficiency system.
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 29
Description: 2-9 L samples collected while on solar noon station from CTD Niskin bottles at 5 m depth (3 stations), the deep chlorophyll maximum (22 stations) and 400 m depth (22 stations). All 28 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each deep chlorophyll maximum and 400 m samples were processed through the Gas Transfer Efficiency system.
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 52
Description: 100 L water samples collected from marine snow catcher (MSC) (usually) at mixed layer depth + 10m and mixed layer depth + 100m; 4 x 3.5 L for different types of particles (suspended, slow-sinking, fast-sinking and marine snow) were filtered for POC, BSi, PIC and Chl-a analysis.
PhytoplanktonQuantity: number of samples = 10
Description: 1.5-3.0 L samples collected from 10 solar noon stations, with manual deployment of a Garrett Screen. These samples were pooled with the primary SML sample after all aliquots for the above listed biogeochemical analyses had been collected. An aliquot from the pooled sample will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents). The remainder of each pooled sample was processed through the Gas Transfer Efficiency system (included in the total 23 primary samples).
PhytoplanktonQuantity: number of samples = 23
Description: 5 L samples (~30 cm depth) collected with on 23 solar noon stations using a peristaltic pump deployed manually over the side of the ship. All 23 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each sample was processed through the Gas Transfer Efficiency system.
PhytoplanktonQuantity: number of samples = 29
Description: 5 L samples collected while on 28 solar noon stations (six from the Deck Lab; 22 from the Met Lab). All 28 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each sample was processed through the Gas Transfer Efficiency system.
PhytoplanktonQuantity: number of samples = 29
Description: 2-9 L samples collected while on solar noon station from CTD Niskin bottles at 5 m depth (3 stations), the deep chlorophyll maximum (22 stations) and 400 m depth (22 stations). All 28 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA. The remainder of each deep chlorophyll maximum and 400 m samples were processed through the Gas Transfer Efficiency system.
PhytoplanktonQuantity: number of profiles = 27
Description: Images of particles (0 – 600m) were collected by multiple imaging devices (LISST-HOLO2, CPICS, UVP5) for particle size distribution analysis. Backscatter/ fluorescence data was collected by ECO TRIPLET3 and CTD data was collected by RBR concerto.
PhytoplanktonQuantity: number of profiles = 190
Description: Abundance and of phytoplankton species Lugol’s samples collected from surface and DCM each pre-dawn and noon CTD.
PhytoplanktonQuantity: number of samples = 81
Description: 20 L of seawater samples were collected from 27 pre-dawn stations, CTD Niskin bottles and 3 depths (Surface, DCM and 500 m) and filtered through 3.0 µm filter pore size, flash frozen in liquid nitrogen and stored at – 80 °C. Samples will be sequenced for meta- genomics and – transcriptomics and analysed for particulate bacteria and single cell phytoplankton.
PhytoplanktonQuantity: number of profiles = 56
Description: Quantification of pico- and nanophytoplankton abundance from all depths between the surface and 200m from CTD casts by flow cytometry.
PhytoplanktonQuantity: number of hauls = 23
Description: Daily predawn WP2 bongo (200 µm) vertical haul from 200 m to surface for AMT mesoplankton community composition time series archive.
PhytoplanktonQuantity: number of samples = 54
Description: 11 L Samples collected from solar noon CTD Niskin bottles at the deep chlorophyll maximum and 20 m depth and concentrated to 100-150 mL for analysis of microplankton community composition and abundance using FlowCAM in collaboration with Elaine Fileman at PML.
ZooplanktonQuantity: number of profiles = 27
Description: Images of particles (0 – 600m) were collected by multiple imaging devices (LISST-HOLO2, CPICS, UVP5) for particle size distribution analysis. Backscatter/ fluorescence data was collected by ECO TRIPLET3 and CTD data was collected by RBR concerto.
ZooplanktonQuantity: number of samples = 243
Description: Formaldehyde preserved zooplankton samples collected at 9 discrete depths at pre-dawn stations using the HydroBios Mammoth net.
ZooplanktonQuantity: number of stations = 23
Description: Frozen zooplankton community samples collected from 200m to surface at pre-dawn stations with a 200micron Bongo net for Electron Transfer System (ETS) enzyme analysis to give an estimate of community respiration.
ZooplanktonQuantity: number of stations = 19
Description: Frozen Oithona spp. samples collected from 200m to surface at pre-dawn stations with a 120micron Bongo net for Electron Transfer System (ETS) enzyme analysis to give an estimate of respiration.
ZooplanktonQuantity: number of hauls = 23
Description: Daily predawn WP2 bongo (200 µm) vertical haul from 200 m to surface for AMT mesoplankton community composition time series archive.
ZooplanktonQuantity: number of samples = 54
Description: 11 L Samples collected from solar noon CTD Niskin bottles at the deep chlorophyll maximum and 20 m depth and concentrated to 100-150 mL for analysis of microplankton community composition and abundance using FlowCAM in collaboration with Elaine Fileman at PML.
NeustonQuantity: number of samples = 29
Description: 1.5-4.5 L samples collected (volume dependent on wind and sea conditions) with manual deployment of a Garrett Screen at all solar noon stations. All 29 samples will be analysed for Total Surfactant Activity (SA: mg L-1 Triton-X-100 equivalents), dissolved organic matter composition (LC-OCD-UVD-OND), ?13C, solid phase dissolved organic matter and RNA; 23 of these samples were processed through the Gas Transfer Efficiency system.
Pelagic bacteria/micro-organismsQuantity: number of profiles = 56
Description: Quantification of heterotrophic bacteria abundance from all depths between the surface and 200m from CTD casts by flow cytometry.
Pelagic bacteria/micro-organismsQuantity: number of samples = 81
Description: 20 L of seawater samples were collected from 27 pre-dawn stations, CTD Niskin bottles, 3 depths (Surface, DCM and 500 m) and filtered through 3.0 µm filter pore size and stored at – 80 °C. Samples will be sequenced for metagenomics and analysed for viruses.
Pelagic bacteria/micro-organismsQuantity: number of samples = 48
Description: seawater samples from pre-dawn CTD casts were filtered using Anotop 0.02µm pore size filters for analysis of viruses at the University of California.
Pelagic bacteria/micro-organismsQuantity: number of samples = 114
Description: 5.8L of seawater samples from pre-dawn CTD casts were filtered using Sterivex 0.22µm pore size filters for the PML DNA archives.
Pelagic bacteria/micro-organismsQuantity: number of samples = 81
Description: 20 L of seawater samples were collected from 27 pre-dawn stations, CTD Niskin bottles and 3 depths (Surface, DCM and 500 m) and filtered through 3.0 µm filter pore size, flash frozen in liquid nitrogen and stored at – 80 °C. Samples will be sequenced for meta- genomics and – transcriptomics and analysed for particulate bacteria and single cell phytoplankton.
Pelagic bacteria/micro-organismsQuantity: number of samples = 81
Description: 20 L of seawater samples were collected from 27 pre-dawn stations, CTD Niskin bottles and 3 depths (Surface, DCM and 500 m) and filtered through 3.0 µm filter pore size, flash frozen in liquid nitrogen and stored at – 80 °C. Samples will be sequenced for meta- genomics and – transcriptomics and analysed for free-living bacteria.
Pelagic bacteria/micro-organismsQuantity: number of samples = 54
Description: 5.8L of seawater samples from pre-dawn CTD casts were filtered using Sterivex 0.22µm pore size filters for analysis of DNA materials at the University of California.
Other biological/fisheries measurementQuantity: number of samples = 36
Description: 4 L of seawater samples were collected from 18 pre-dawn station and were subsamples from the CTD Niskin bottles, 2 depths (DCM and 500 m), filtered through sterivex 0.45 µm filter pore size and stored at – 80 °C. Samples will be sequenced and analysed for eDNA.
Meteorology 
Incident radiationQuantity: activity duration in days = 32
Description: Continuously recording sky and water radiance (Li, Lt) and total irradiance at the oceans surface (Es) with solar-tracking SAS system using Satlantic/SeaBird Scientific OCRs and TRIOS RAMSES radiometers.
Atmospheric chemistryQuantity: number of samples = 11
Description: 11 rain samples collected for major ion determination. PI = Alex Baker, UEA.
Atmospheric chemistryQuantity: number of samples = 39
Description: 23 x coarse (>1µm) / fine (<1µm), 12 x bulk, 4 x size-resolved (6 stage Anderson style cascade impactor) aerosol samples collected using high volume aerosol samplers (Tisch Environmental). Total and soluble trace metals will be determined. PI = Alex Baker, UEA.
Atmospheric chemistryQuantity: number of samples = 23
Description: 23 x coarse (>1µm) / fine (<1µm) aerosol samples collected using a high volume aerosol sampler (Tisch Environmental). Soluble major ions will be determined. PI = Alex Baker, UEA.
Atmospheric chemistryQuantity: number of samples = 18
Description: 11 x unfiltered, 7 filtered rain samples collected for trace metal determination. PI = Alex Baker, UEA.
Other meteorological measurementsQuantity: activity duration in days = 28
Description: The automated Eddy Covariance system was positioned on the Met Platform to estimate air-sea gas flux, 24 hours per day while operational.
Moorings, landers, buoys 
Physical oceanography 
Surface drifters/drifting buoys48° 44' 58" S  52° 51' 49" W — Argo – APEX FLOAT
Surface drifters/drifting buoys40° 32' 16" N  16° 55' 9" W — Argo – BGC FLOAT
Surface drifters/drifting buoys32° 58' 14" S  32° 52' 53" W — Argo – APEX FLOAT
Surface drifters/drifting buoys0° 0' 6" S  25° 7' 30" W — Argo – BGC FLOAT
Surface drifters/drifting buoys27° 18' 42" S  24° 31' 32" W — Argo – BGC FLOAT
Surface drifters/drifting buoys45° 30' 12" S  47° 49' 44" W — Argo – APEX FLOAT
Surface drifters/drifting buoys34° 54' 57" S  36° 26' 0" W — Argo – APEX FLOAT
Surface drifters/drifting buoys28° 22' 55" S  25° 4' 52" W — Argo – APEX FLOAT
Surface drifters/drifting buoys24° 4' 1" S  24° 30' 0" W — Argo – APEX FLOAT
Surface drifters/drifting buoys46° 21' 28" N  11° 25' 50" W — Argo – APEX FLOAT
Surface drifters/drifting buoys46° 58' 11" N  10° 27' 24" W — Argo – APEX FLOAT
Surface drifters/drifting buoys46° 5' 46" S  48° 44' 21" W — Argo – BGC FLOAT
Surface drifters/drifting buoys11° 53' 39" S  25° 3' 5" W — Argo – BGC FLOAT
Surface drifters/drifting buoys10° 25' 30" N  25° 17' 23" W — Argo – BGC FLOAT
Biology and fisheries 
Sediment traps18° 32' 33" S  25° 4' 22" W — Sediment trap, current meter and MicroCAT mooring recovery (SOG mooring).
Data held at BODC 
Series/Profiles 
57  CTD/STD cast
Reference numbers
Transmittance and attenuance of the water column
Dissolved oxygen parameters in the water column
Optical backscatter
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column
Raw oxygen sensor output
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
[Show series]
Reference numbers
Transmittance and attenuance of the water column
Dissolved oxygen parameters in the water column
Optical backscatter
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column
Raw oxygen sensor output
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
[Hide series]

BODC idDate/TimeLocationDoc.
21538632023-03-01 14:00:44 33° 16' 24" S  33° 20' 14" W  View metadata report for BODC series reference number 2153863
21538752023-03-02 05:45:53 31° 52' 18" S  31° 17' 33" W  View metadata report for BODC series reference number 2153875
21538992023-03-03 05:38:39 30° 9' 16" S  28° 10' 19" W  View metadata report for BODC series reference number 2153899
21539182023-03-04 05:34:16 28° 23' 4" S  25° 4' 56" W  View metadata report for BODC series reference number 2153918
21539312023-03-04 14:00 27° 18' 49" S  24° 31' 25" W  View metadata report for BODC series reference number 2153931
21540062023-03-08 14:01:39 14° 53' 47" S  25° 3' 16" W  View metadata report for BODC series reference number 2154006
21541592023-03-15 13:57:10 7° 16' 7" N  25° 20' 43" W  View metadata report for BODC series reference number 2154159
21542642023-03-23 12:54:29 32° 6' 19" N  22° 13' 24" W  View metadata report for BODC series reference number 2154264
21537582023-02-24 15:04:46 43° 21' 57" S  44° 40' 12" W  View metadata report for BODC series reference number 2153758
21538142023-02-27 15:00:24 36° 47' 48" S  39° 41' 21" W  View metadata report for BODC series reference number 2153814
21538262023-02-28 06:48:44 35° 31' 55" S  37° 35' 11" W  View metadata report for BODC series reference number 2153826
21539432023-03-05 05:31:08 25° 9' 27" S  24° 29' 29" W  View metadata report for BODC series reference number 2153943
21540802023-03-12 05:31:35 3° 38' 23" S  25° 9' 52" W  View metadata report for BODC series reference number 2154080
21541352023-03-14 13:59:04 4° 9' 22" N  25° 24' 20" W  View metadata report for BODC series reference number 2154135
21541962023-03-20 04:37:38 22° 36' 53" N  25° 0' 14" W  View metadata report for BODC series reference number 2154196
21542032023-03-20 12:59:37 23° 43' 45" N  24° 59' 59" W  View metadata report for BODC series reference number 2154203
21543072023-03-25 03:39:19 36° 47' 39" N  19° 27' 38" W  View metadata report for BODC series reference number 2154307
21537222023-02-23 08:24:04 46° 5' 51" S  48° 44' 19" W  View metadata report for BODC series reference number 2153722
21539802023-03-07 13:59:51 18° 1' 23" S  25° 3' 48" W  View metadata report for BODC series reference number 2153980
21540312023-03-09 14:03:03 11° 53' 40" S  25° 3' 6" W  View metadata report for BODC series reference number 2154031
21540672023-03-11 05:35:19 6° 40' 57" S  25° 11' 28" W  View metadata report for BODC series reference number 2154067
21541722023-03-16 13:57:46 10° 25' 20" N  25° 17' 27" W  View metadata report for BODC series reference number 2154172
21541842023-03-19 12:58:07 20° 41' 55" N  24° 59' 51" W  View metadata report for BODC series reference number 2154184
21542152023-03-21 04:39:23 25° 42' 1" N  25° 0' 3" W  View metadata report for BODC series reference number 2154215
21543202023-03-26 03:40:37 39° 39' 39" N  17° 31' 33" W  View metadata report for BODC series reference number 2154320
21537102023-02-21 13:58:25 50° 4' 14" S  55° 0' 43" W  View metadata report for BODC series reference number 2153710
21537462023-02-24 08:10:24 44° 1' 56" S  45° 39' 36" W  View metadata report for BODC series reference number 2153746
21538872023-03-02 14:01:17 31° 16' 28" S  30° 11' 43" W  View metadata report for BODC series reference number 2153887
21539792023-03-06 14:02:47 20° 50' 49" S  24° 29' 46" W  View metadata report for BODC series reference number 2153979
21540552023-03-10 14:01:33 8° 44' 38" S  25° 9' 24" W  View metadata report for BODC series reference number 2154055
21543192023-03-25 11:59:33 37° 47' 48" N  18° 46' 50" W  View metadata report for BODC series reference number 2154319
21543322023-03-26 11:51:11 40° 32' 13" N  16° 55' 5" W  View metadata report for BODC series reference number 2154332
21538512023-03-01 05:44:28 33° 56' 5" S  34° 27' 12" W  View metadata report for BODC series reference number 2153851
21540432023-03-10 05:39:34 9° 51' 50" S  25° 2' 33" W  View metadata report for BODC series reference number 2154043
21541232023-03-14 05:33:25 3° 1' 6" N  25° 25' 3" W  View metadata report for BODC series reference number 2154123
21537712023-02-25 08:06:20 41° 14' 48" S  43° 53' 24" W  View metadata report for BODC series reference number 2153771
21537832023-02-25 14:59:15 40° 20' 48" S  43° 50' 36" W  View metadata report for BODC series reference number 2153783
21538382023-02-28 15:00:16 34° 54' 58" S  36° 25' 58" W  View metadata report for BODC series reference number 2153838
21539062023-03-03 14:00:23 29° 33' 46" S  27° 7' 55" W  View metadata report for BODC series reference number 2153906
21539552023-03-05 14:01:01 24° 4' 23" S  24° 30' 1" W  View metadata report for BODC series reference number 2153955
21540182023-03-09 05:38:29 12° 48' 16" S  25° 3' 11" W  View metadata report for BODC series reference number 2154018
21540792023-03-11 13:56:14 5° 39' 0" S  25° 10' 0" W  View metadata report for BODC series reference number 2154079
21541472023-03-15 05:31:25 6° 10' 41" N  25° 22' 7" W  View metadata report for BODC series reference number 2154147
21542272023-03-21 12:52:28 26° 39' 5" N  24° 59' 46" W  View metadata report for BODC series reference number 2154227
21542392023-03-22 04:46:19 28° 20' 53" N  24° 8' 51" W  View metadata report for BODC series reference number 2154239
21542402023-03-22 12:57:55 29° 16' 19" N  23° 40' 38" W  View metadata report for BODC series reference number 2154240
21542522023-03-23 04:30:47 31° 3' 2" N  22° 46' 15" W  View metadata report for BODC series reference number 2154252
21538022023-02-27 07:10:31 37° 25' 31" S  40° 44' 51" W  View metadata report for BODC series reference number 2153802
21539672023-03-06 05:34:08 21° 57' 40" S  24° 29' 41" W  View metadata report for BODC series reference number 2153967
21539922023-03-08 05:35:55 16° 0' 53" S  25° 3' 40" W  View metadata report for BODC series reference number 2153992
21537342023-02-23 14:59:40 45° 30' 12" S  47° 49' 44" W  View metadata report for BODC series reference number 2153734
21537952023-02-26 15:04:07 38° 27' 6" S  42° 45' 30" W  View metadata report for BODC series reference number 2153795
21540922023-03-13 06:22:51 0° 0' 3" S  25° 8' 13" W  View metadata report for BODC series reference number 2154092
21541112023-03-13 13:57:17 0° 55' 47" N  25° 22' 38" W  View metadata report for BODC series reference number 2154111
21541602023-03-16 05:37:48 9° 15' 51" N  25° 18' 43" W  View metadata report for BODC series reference number 2154160
21542762023-03-24 04:35 34° 3' 54" N  21° 11' 18" W  View metadata report for BODC series reference number 2154276
21542882023-03-24 12:58:34 35° 5' 52" N  20° 37' 48" W  View metadata report for BODC series reference number 2154288
Discrete samples 
57  CTD frame plus rosette sampler
39  Cascade impactor atmospheric sampler
56  Marine snow catcher
50  Optical instruments
11  Rain water collector
113  Sample taken from ship's non-toxic supply
24  Twin WP-2 net mounted on a frame
27  Underwater camera system
29  Unspecified zooplankton net or nets

 

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