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RRS Discovery D258

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD258
Cruise period2001-11-01 — 2001-12-18
StatusCompleted
Port of departureGlasgow, United Kingdom
Port of returnSouthampton, United Kingdom
ObjectivesRRS Discovery cruise 258 was the first of four supported by the NERC Marine Productivity (MarProd) thematic programme. The MarProd cruise series provides the main opportunity for data- and sample-gathering to address the overall programme goal, viz: "to develop coupled modelling and observation systems for the pelagic ecosystem, with emphasis on physical factors affecting zooplankton dynamics". The principal cruise-specific research objectives for Discovery 258 were as follows:
1) Map the physical features of the survey region (Irminger Sea and parts of the Iceland Basin) in terms of water mass distribution, velocity field and mixed layer properties
2) Obtain additional information to estimate future water mass fluxes and particle trajectories, via float deployments and tracer analyses
3) Collect water samples for plant pigment and microscopic analyses, to estimate the biomass of different taxonomic/functional groups of microplankton
4) Measure high resolution profiles of inorganic and organic nutrient concentrations
5) Determine the 3D abundance of mesozooplankton of interest (primarily the copepod Calanus finmarchicus), and their planktivorous predators (primarily euphausiid spp), obtaining material for further taxonomic, physiological and biochemical studies.

There was strong emphasis on obtaining an integrated, interdisciplinary data set, not only to bring together researchers involved in survey-related MarProd projects, but also to "set the scene" for subsequent cruises during 2002 (involving additional groups) - and to facilitate comparisons with historical datasets (eg NORWESTLANT, 1963 and Continuous Plankton Recorder surveys); EU-supported zooplankton programmes (TASC and ICOS); and other national and international studies.
There was a mid-cruise port call at Reykjavik, Iceland from 25-27 November.
Chief scientistRaymond T Pollard (Southampton Oceanography Centre), Steven J Hay (Fisheries Research Services Aberdeen Marine Laboratory)
ProjectMarine Productivity
Coordinating bodyUK-NERC
Cruise reportRRS Discovery D258 cruise report d258.pdf (7.45 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificNorthern North Atlantic Iceland Basin Irminger Sea Reykjanes Ridge
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 5
Description: Ocean Sampler towed multinet system with water sampling system and OPC
Water bottle stationsQuantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
Water bottle stationsQuantity: number of stations = 28
Description: CTD with oxygen sensor, fluorometer, transmissometer, nephelometer and bottle firing rosette (sal, oxygen and chl calibration samples plus nutrients).
CTD stationsQuantity: number of stations = 28
Description: CTD with oxygen sensor, fluorometer, transmissometer, nephelometer and bottle firing rosette (sal, oxygen and chl calibration samples plus nutrients).
Subsurface temperature and salinity measurementsQuantity: activity duration in days = 45
Description: ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Transparency (eg transmissometer)Quantity: activity duration in days = 45
Description: ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Transparency (eg transmissometer)Quantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
Transparency (eg transmissometer)Quantity: number of stations = 28
Description: CTD with oxygen sensor, fluorometer, transmissometer, nephelometer and bottle firing rosette (sal, oxygen and chl calibration samples plus nutrients).
Optics (eg underwater light levels)Quantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
Current profiler (eg ADCP)Quantity: activity duration in days = 45
Description: ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Current profiler (eg ADCP)Quantity: number of stations = 28
Description: 150 and 600 kHz ADCP mounted on CTD frame
Instrumented wave measurementsQuantity: activity duration in days = 45
Description: ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Chemical oceanography 
OxygenQuantity: number of stations = 28
Description: CTD with oxygen sensor, fluorometer, transmissometer, nephelometer and bottle firing rosette (sal, oxygen and chl calibration samples plus nutrients).
Other dissolved gasesQuantity: number of stations = 9
Description: Profiles of samples for sulphur hexafluoride (SF6) analysis from CTD rosette.
PhosphateQuantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
PhosphateDescription: Nutrient profiles at CTD and ARIES stations.
NitrateDescription: Nutrient profiles at CTD and ARIES stations.
NitrateQuantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
SilicateQuantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
SilicateDescription: Nutrient profiles at CTD and ARIES stations.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 28
Description: CTD with oxygen sensor, fluorometer, transmissometer, nephelometer and bottle firing rosette (sal, oxygen and chl calibration samples plus nutrients).
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 28
Description: Samples for HPLC pigments analysis picoplankton samples for flow cytometry analyses from CTD rosette plus phytoplankton samples (Lugol and formalin fixatives) from 2-3 depths.
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: Total chlorophyll concentration from CTD, ARIES, Ocean Sampler stations and underway sampling.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 45
Description: ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 11
Description: Dual Methot net deployments
Biochemical measurements (eg lipids, amino acids)Quantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
PhytoplanktonQuantity: number of stations = 28
Description: Samples for HPLC pigments analysis picoplankton samples for flow cytometry analyses from CTD rosette plus phytoplankton samples (Lugol and formalin fixatives) from 2-3 depths.
ZooplanktonQuantity: number of stations = 5
Description: Ocean Sampler towed multinet system with water sampling system and OPC
ZooplanktonQuantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
ZooplanktonQuantity: number of stations = 11
Description: Dual Methot net deployments
ZooplanktonDescription: Samples for ciliate and heterotrophic dinoflagellates from CTD rosette.
Pelagic bacteria/micro-organismsQuantity: number of stations = 28
Description: Samples for HPLC pigments analysis picoplankton samples for flow cytometry analyses from CTD rosette plus phytoplankton samples (Lugol and formalin fixatives) from 2-3 depths.
Acoustic reflection on marine organisms.Quantity: number of deployments = 21
Description: Towed EK500 Scientific Echosounder
Acoustic reflection on marine organisms.Quantity: number of stations = 5
Description: Lowered EK500 scientific echosounder
Other biological/fisheries measurementQuantity: number of stations = 11
Description: Dual Methot net deployments
Other biological/fisheries measurementQuantity: number of stations = 5
Description: Ocean Sampler towed multinet system with water sampling system and OPC
Other biological/fisheries measurementQuantity: number of deployments = 17
Description: ARIES towed zooplankton multinet system with CTD, fluorometer, transmissometer, OPC, water bottle sampler for sal and chl calibration samples and nutrients, and zooplankton net systems (discrete and integrated).
Meteorology 
Incident radiationQuantity: activity duration in days = 45
Description: ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Routine standard measurementsQuantity: activity duration in days = 45
Description: ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Moorings, landers, buoys 
Physical oceanography 
Other physical oceanographic measurements60° 38' 59" N  34° 17' 59" W — Apex 434 A2F9E float
Other physical oceanographic measurements61° 2' 59" N  37° 2' 59" W — Martec 34 D66C9 float
Other physical oceanographic measurements56° 34' 0" N  36° 53' 59" W — Martec 33 D64A4 float
Other physical oceanographic measurements61° 2' 59" N  37° 2' 59" W — Apex 436 A3072 float
Data held at BODC Get data
Discrete samples 
29  CTD frame plus rosette samplerPhytoplankton taxonomic biomass in water bodies
Phytoplankton generic biomass in water bodies
Dissolved total and organic nitrogen concentrations in the water column
Zooplankton taxonomy-related abundance per unit volume of the water column
Biological detritus in the water column suspended particulate material
Microzooplankton taxonomy-related biomass expressed as carbon per unit volume of the water column
Density of the water column
Transmittance and attenuance of the water column
Chlorophyll pigment concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Silicate concentration parameters in the water column
Salinity of the water column
Concentration of suspended particulate material in the water column
Zooplankton non taxonomy-related abundance per unit volume of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Nitrate concentration parameters in the water column
Temperature of the water column
Dissolved oxygen parameters in the water column
Microzooplankton taxonomic abundance in water bodies
Phosphate concentration parameters in the water column
Phaeopigment concentrations in the water column
Phytoplankton generic abundance in water bodies
11  Dual Methot netZooplankton and zoobenthos morphological parameters
Zooplankton taxonomy-related abundance per unit volume of the water column
Zooplankton and zoobenthos development stage parameters
Metadata parameters
6  Lowered EK-500 acoustic profiler
18  MarLab Aberdeen ARIES net and environmental sampling systemZooplankton and zoobenthos morphological parameters
Zooplankton taxonomy-related abundance per unit volume of the water column
Fish abundance in water bodies
Zooplankton chemical composition
Zooplankton and zoobenthos development stage parameters
Density of the water column
Transmittance and attenuance of the water column
Chlorophyll pigment concentrations in water bodies
Metadata parameters
Silicate concentration parameters in the water column
Salinity of the water column
Horizontal spatial co-ordinates
Nitrate concentration parameters in the water column
Temperature of the water column
Date and time
Phosphate concentration parameters in the water column
Reference numbers
5  Marine Lab Aberdeen Ocean Sampler netZooplankton taxonomy-related abundance per unit volume of the water column
Fish abundance in water bodies
Microzooplankton taxonomy-related biomass expressed as carbon per unit volume of the water column
Chlorophyll pigment concentrations in water bodies
Zooplankton non taxonomy-related abundance per unit volume of the water column
Microzooplankton taxonomic abundance in water bodies
282  Sample taken from ship's non-toxic supplyChlorophyll pigment concentrations in water bodies
Salinity of the water column