Resources

RRS Discovery D264

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD264
Cruise period2002-07-25 — 2002-08-28
StatusCompleted
Port of departureFairlie, United Kingdom
Port of returnFairlie, United Kingdom
PurposeResearch
ObjectivesRRS Discovery cruise 264 was the third 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 264 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) To measure high resolution profiles of inorganic nutrient concentrations 3) Collect water samples for plant pigment and microscopic analyses, to estimate the biomass of different taxonomic/functional groups of microplankton. 4) 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. The process studies covered: estimation of primary productivity, Calanus egg production and naupliae development, the influence of food quality on calanus egg production, Oithona and Calanus naupliae feeding experiments, Oithona egg production, collection of samples for lipid hormone analysis, collection of samples fo C/N and stable isotope ratios. The broad scope of the dataset compiled by the Marine Productivity series of cruises to the Irminger Sea is intended 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.
Chief scientistAndrew Brierley (Gatty Marine Laboratory)
ProjectMarine Productivity
Coordinating bodyUK-NERC
Cruise reportRRS Discovery D264 cruise report d264.pdf (6.28 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
SpecificNorthern North Atlantic, Iceland Basin, Irminger Sea, Reykjanes Ridge
Track chartsRRS Discovery D264 cruise track — d264track.pdf (0.31 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of deployments = 26
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 = 22
Description: Ocean Sampler towed multinet system with water sampling system and OPC
Water bottle stationsQuantity: number of stations = 23
Description: CTD: Sea-Bird 911+ with dual CT sensors, dissolved oxygen sensor, transmissometer, fluorometer, OBS, Niskin bottles.
CTD stationsQuantity: number of stations = 23
Description: CTD: Sea-Bird 911+ with dual CT sensors, dissolved oxygen sensor, transmissometer, fluorometer, OBS, Niskin bottles.
CTD stationsQuantity: number of deployments = 26
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).
Subsurface temperature and salinity measurementsDescription: 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 = 26
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)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 stations = 23
Description: CTD: Sea-Bird 911+ with dual CT sensors, dissolved oxygen sensor, transmissometer, fluorometer, OBS, Niskin bottles.
Optics (eg underwater light levels)Quantity: number of stations = 23
Description: CTD: Sea-Bird 911+ with dual CT sensors, dissolved oxygen sensor, transmissometer, fluorometer, OBS, Niskin bottles.
Current profiler (eg ADCP)Quantity: number of stations = 28
Description: 300 & 600 kHz ADCP mounted on CTD frame.
Chemical oceanography 
OxygenQuantity: number of stations = 23
Description: CTD: Sea-Bird 911+ with dual CT sensors, dissolved oxygen sensor, transmissometer, fluorometer, OBS, Niskin bottles.
OxygenDescription: Nutrient and dissolved gas profiles at CTD and ARIES stations, and underway non-toxic supply
PhosphateDescription: Nutrient and dissolved gas profiles at CTD and ARIES stations, and underway non-toxic supply
NitrateDescription: Nutrient and dissolved gas profiles at CTD and ARIES stations, and underway non-toxic supply
SilicateDescription: Nutrient and dissolved gas profiles at CTD and ARIES stations, and underway non-toxic supply
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: Total and size fractionated chlorophyll concentration from CTD, ARIES, Ocean Sampler stations, and underway non-toxic supply.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of deployments = 23
Description: Fast Repetition rate Fluorometer (FRRF), short, vertical casts.
Phytoplankton pigs (eg chlorophyll, fluorescence)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.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of deployments = 26
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).
Biochemical measurements (eg lipids, amino acids)Quantity: number of hauls = 22
Description: Dual Methot net
Biochemical measurements (eg lipids, amino acids)Quantity: number of deployments = 26
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 deployments = 7
Description: Continuous Plankton Recorder
ZooplanktonQuantity: number of stations = 22
Description: Ocean Sampler towed multinet system with water sampling system and OPC
ZooplanktonQuantity: number of hauls = 22
Description: Dual Methot net
ZooplanktonQuantity: number of deployments = 26
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).
Acoustic reflection on marine organisms.Quantity: number of stations = 28
Description: 300 & 600 kHz ADCP mounted on CTD frame.
Acoustic reflection on marine organisms.Quantity: number of deployments = 54
Description: Lowered EK500 scientific echosounder
Other biological/fisheries measurementQuantity: number of hauls = 22
Description: Dual Methot net
Other biological/fisheries measurementQuantity: number of deployments = 26
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 radiationDescription: Ship's underway navigation, sea surface (thermosalinograph, transm, fluor and FRRF) and meterorogical measurements plus 75 and 150 kHz VM-ADCP and wave measurements.
Other meteorological measurementsDescription: 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 
Meteorology 
Routine standard measurements57° 27' 41" N  35° 0' 0" W — UK Met Office drifting buoy (Argos 21570) with atmospheric pressure and temperature sensors deployed.
Routine standard measurements61° 26' 18" N  40° 0' 0" W — UK Met Office drifting buoy (Argos 21512) with atmospheric pressure and temperature sensors deployed.
Data held at BODC Get data
Discrete samples 
1  1 metre diameter zooplankton ring net
70  CTD frame plus rosette samplerDissolved total and organic nitrogen concentrations in the water column
Phytoplankton taxonomic biomass in water bodies
Phytoplankton generic biomass in water bodies
Zooplankton growth rates
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
Zooplankton chemical composition
Transmittance and attenuance of the water column
Chlorophyll pigment concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Primary production in the water column
Metadata parameters
Zooplankton egg hatch proportion
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
Zooplankton reproduction rate parameters
Nitrate concentration parameters in the water column
Temperature of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Dissolved oxygen parameters in the water column
Experiment state variables
Microzooplankton taxonomic abundance in water bodies
Phosphate concentration parameters in the water column
Phytoplankton generic abundance in water bodies
71  Continuous Plankton Recorder tow segment
22  Dual Methot netZooplankton taxonomy-related abundance per unit volume of the water column
Zooplankton and zoobenthos morphological parameters
Zooplankton and zoobenthos development stage parameters
Stable isotopes in biota
Metadata parameters
Concentration of other substances in biota
21  Fast Repetition Rate Fluorometer Dark ChamberVariable fluorescence parameters
21  Fast Repetition Rate Fluorometer Light ChamberVariable fluorescence parameters
6  Lowered EK-500 acoustic profiler
26  MarLab Aberdeen ARIES net and environmental sampling systemFish abundance in water bodies
Zooplankton growth rates
Zooplankton taxonomy-related abundance per unit volume of the water column
Zooplankton and zoobenthos morphological parameters
Zooplankton and zoobenthos development stage parameters
Density of the water column
Zooplankton chemical composition
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
Stomach and gut contents
Horizontal spatial co-ordinates
Nitrate concentration parameters in the water column
Temperature of the water column
Phosphate concentration parameters in the water column
Reference numbers
Date and time
22  Marine Lab Aberdeen Ocean Sampler netFish abundance in water bodies
Zooplankton taxonomy-related abundance per unit volume of the water column
Zooplankton and zoobenthos development stage parameters
Chlorophyll pigment concentrations in water bodies
Metadata parameters
Zooplankton non taxonomy-related abundance per unit volume of the water column
428  Sample taken from ship's non-toxic supplyZooplankton chemical composition
Chlorophyll pigment concentrations in water bodies
Metadata parameters
Silicate concentration parameters in the water column
Salinity of the water column
Zooplankton reproduction rate parameters
Nitrate concentration parameters in the water column
Experiment state variables
Phosphate concentration parameters in the water column
3  Twin WP-2 net mounted on a frameZooplankton taxonomy-related abundance per unit volume of the water column
Zooplankton and zoobenthos morphological parameters
Metadata parameters
Zooplankton feeding
Zooplankton reproduction rate parameters
26  Unspecified zooplankton net or netsZooplankton non taxonomy-related biomass expressed as protein per unit volume of the water column
Zooplankton growth rates
Zooplankton taxonomy-related abundance per unit volume of the water column
Zooplankton and zoobenthos morphological parameters
Zooplankton chemical composition
Metadata parameters
Zooplankton feeding
Zooplankton reproduction rate parameters
7  WP-2 zooplankton netZooplankton non taxonomy-related biomass expressed as protein per unit volume of the water column
Zooplankton growth rates
Zooplankton chemical composition