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RRS Discovery D365

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD365
Cruise period2011-05-11 — 2011-06-02
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnLiverpool, United Kingdom
PurposeResearch
ObjectivesTo make the annual occupation of the Extended Ellett Line, a full depth hydrographic section between Iceland, Rockall and Scotland.

To collect samples for CFC and SF6, DIC and TA, nutrients (NO2+3, PO4, SiO4, ammonia), aluminium, POC, bacteria and chlorophyll a, pigments and taxonomy.
Chief scientistJane F Read (National Oceanography Centre, Southampton)
ProjectOceans 2025
Coordinating bodyNatural Environment Research Council (NERC)
Cruise reportRRS Discovery D365 cruise report d365.pdf (9.84 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificData were collected from Iceland down 20°W to 60°N, then west to Rockall, Barra Head and the Sound of Mull. A few surface samples were collected underway between the Scottish Islands and Iceland.
Track chartsRRS Discovery D365 cruise track — d365trk.pdf (0.90 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 4600
Description: Thermosalinograph, temp, salinity, fluorescence, transmittance
CTD stationsQuantity: number of profiles = 55
Description: CTD, dissolved oxygen, fluorescence, transmittance, attenuation
Current profiler (eg ADCP)Quantity: track kilometres = 4600
Description: 150 kHz vessel mounted ADCP
Other physical oceanographic measurementsQuantity: number of samples = 71
Description: Salinity collected from non-toxic underway supply
Other physical oceanographic measurementsQuantity: number of samples = 236
Description: Salinity collected from Niskin bottles
Chemical oceanography 
OxygenQuantity: number of samples = 150
Description: Dissolved oxygen collected from CTD Niskin bottles
Other dissolved gasesQuantity: number of samples = 352
Description: CFC & SF6 collected from CTD Niskin bottles
PhosphateQuantity: number of samples = 512
Description: Nitrate+nitrite, phosphate, silicate, ammonia collected from Niskin bottles
PhosphateQuantity: number of samples = 24
Description: Nitrate+nitrite, phosphate, silicate, ammonia from non-toxic underway supply
NitrateQuantity: number of samples = 512
Description: Nitrate+nitrite, phosphate, silicate, ammonia collected from Niskin bottles
NitrateQuantity: number of samples = 24
Description: Nitrate+nitrite, phosphate, silicate, ammonia from non-toxic underway supply
AmmoniaQuantity: number of samples = 24
Description: Nitrate+nitrite, phosphate, silicate, ammonia from non-toxic underway supply
AmmoniaQuantity: number of samples = 512
Description: Nitrate+nitrite, phosphate, silicate, ammonia collected from Niskin bottles
SilicateQuantity: number of samples = 24
Description: Nitrate+nitrite, phosphate, silicate, ammonia from non-toxic underway supply
SilicateQuantity: number of samples = 512
Description: Nitrate+nitrite, phosphate, silicate, ammonia collected from Niskin bottles
AlkalinityQuantity: number of samples = 33
Description: DIC/TA from non-toxic underway supply
AlkalinityQuantity: number of samples = 451
Description: DIC/TA collected from CTD Niskin bottles
Other chemical oceanographic measurementsQuantity: number of samples = 33
Description: DIC/TA from non-toxic underway supply
Other chemical oceanographic measurementsQuantity: number of samples = 352
Description: CFC & SF6 collected from CTD Niskin bottles
Other chemical oceanographic measurementsQuantity: number of samples = 451
Description: DIC/TA collected from CTD Niskin bottles
Contamination 
Trace metalsQuantity: number of samples = 180
Description: Aluminium collected from Niskin bottles
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 48
Description: Chlorophyll a collected from Niskin bottles
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 410
Description: HPLC pigments collected from Niskin bottles
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 31
Description: HPLC pigments, flow cytometry, coccolithophore and phytoplankton counts from non-toxic underway supply
Particulate organic matter (inc POC, PON)Quantity: number of samples = 156
Description: POC collected from Niskin bottles
PhytoplanktonQuantity: number of samples = 5
Description: FRRF from non-toxic underway supply
PhytoplanktonQuantity: number of samples = 274
Description: FRRF collected from Niskin bottles
PhytoplanktonQuantity: number of samples = 31
Description: HPLC pigments, flow cytometry, coccolithophore and phytoplankton counts from non-toxic underway supply
PhytoplanktonQuantity: number of samples = 270
Description: Light microscopy identification collected from Niskin bottles
PhytoplanktonQuantity: number of samples = 48
Description: Bacteria collected from Niskin bottles
PhytoplanktonQuantity: number of samples = 331
Description: Flow cytometry enumeration collected from Niskin bottles
PhytoplanktonQuantity: number of samples = 223
Description: Coccolithophore enumeration collected from Niskin bottles
Meteorology 
Routine standard measurementsQuantity: track kilometres = 4600
Description: 'Surfmet', wind speed & direction, pressure, humidity, temp, PAR, TIR
Geology and geophysics 
Single-beam echosoundingQuantity: track kilometres = 4600
Description: PES 10kHz echosounder
Moorings, landers, buoys 
Physical oceanography 
Other physical oceanographic measurements60° 59' 24" N  20° 0' 40" W — Argo float S/N 5540 deployed at 0415 26/5/2011
Other physical oceanographic measurements59° 37' 41" N  19° 7' 0" W — Argo float S/N 5353 deployed at 05:30 27/5/11
Other physical oceanographic measurements59° 58' 30" N  19° 57' 47" W — Argo float S/N 5537 deployed at 20:06 26/5/11
Other physical oceanographic measurements60° 29' 20" N  19° 59' 17" W — Argo float S/N 5541 deployed at approx 12:05 26/5/11
Data held at BODC Get data
Discrete samples 
55  CTD frame plus rosette samplerTotal dissolved inorganic carbon (TCO2) concentration in the water column
Particulate total and organic nitrogen concentrations in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column
Alkalinity, acidity and pH of the water column
Particulate total and organic carbon concentrations in the water column