Resources

RRS Discovery D245

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD245
Cruise period2000-01-27 — 2000-02-20
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnSouthampton, United Kingdom
PurposeResearch
Objectives1) Occupy the Ellett Line (Sound of Mull to Rockall) and the SOC extension to Iceland. Due to atrocious weather conditions we didn't even make it to Rockall, 23 nm short.
2) Recover 5 current meter moorings deployed on Challenger 143 - Y, F, M, 2 in Muck Hole. All recovered except F which was subsequently recovered on an RVS trial trip in April 2000 on Charles Darwin.
3) Sample for nutrients for the entire cruise.
4) Take cores from the Muck Deep.
Chief scientistColin R Griffiths (Scottish Association for Marine Science), N Penny Holliday (Southampton Oceanography Centre)
Cruise reportRRS Discovery D245 cruise report d245.pdf (2.09 MB) 
Ocean/sea areas 
GeneralEnglish Channel
Inner Seas off the West Coast of Scotland
Irish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
SpecificRockall Trough, Malin Shelf, Irish Sea and English Channel
Track chartsRRS Discovery D245 cruise track — trk4405.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 2778
Description: T,S, nutrients
BathythermographQuantity: number of profiles = 95
Description: XBT drops with T5 and T7 probes
Water bottle stationsQuantity: number of stations = 44
Description: FSI rosette pylon - 24 bottles employed on CTD upcasts with calibration samples taken for temperature, salinity, pressure and chlorophyll
CTD stationsQuantity: number of stations = 44
Description: CTD casts
Current profiler (eg ADCP)Quantity: track kilometres = 2778
Description: ADCP
Current profiler (eg ADCP)Quantity: number of stations = 44
Description: CTD with LADCP aquatracka, oxygen, fluorometer, altimeter and nitrate sensors + SIS reversing thermometer and pressure sensor
Instrumented wave measurementsQuantity: track kilometres = 2778
Description: T,S, nutrients
Chemical oceanography 
OxygenQuantity: number of stations = 44
Description: CTD with LADCP aquatracka, oxygen, fluorometer, altimeter and nitrate sensors + SIS reversing thermometer and pressure sensor
OxygenQuantity: number of stations = 44
Description: Calibration samples taken for oxygen
PhosphateQuantity: track kilometres = 2778
Description: T,S, nutrients
PhosphateQuantity: number of stations = 44
Description: Nutrient samples
NitrateQuantity: track kilometres = 2778
Description: T,S, nutrients
NitrateQuantity: number of stations = 44
Description: Nutrient samples
NitrateQuantity: number of stations = 44
Description: CTD with LADCP aquatracka, oxygen, fluorometer, altimeter and nitrate sensors + SIS reversing thermometer and pressure sensor
SilicateQuantity: track kilometres = 2778
Description: T,S, nutrients
SilicateQuantity: number of stations = 44
Description: Nutrient samples
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 44
Description: CTD with LADCP aquatracka, oxygen, fluorometer, altimeter and nitrate sensors + SIS reversing thermometer and pressure sensor
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 44
Description: FSI rosette pylon - 24 bottles employed on CTD upcasts with calibration samples taken for temperature, salinity, pressure and chlorophyll
BirdsQuantity: track kilometres = 2778
Description: Seabirds and cetaceans
Mammals and reptilesQuantity: track kilometres = 2778
Description: Seabirds and cetaceans
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 25
Description: Synoptic met. reports - voluntary observing ship
Other meteorological measurementsQuantity: track kilometres = 2778
Description: T,S, nutrients
Geology and geophysics 
Core - soft bottomQuantity: number of deployments = 11
Description: SMBA multi-corer deployed in Muck Deep
Single-beam echosoundingQuantity: track kilometres = 2778
Description: Bathymetry - PES
Moorings, landers, buoys 
Physical oceanography 
Current meters56° 37' 59" N  6° 24' 59" W — Recovered Tiree Passage mooring Y with 2 RCMs
Current meters57° 16' 59" N  10° 22' 59" W — Recovered mooring M with 6 RCMs
Current meters56° 48' 59" N  6° 37' 59" W — Recovered Muck Hole mooring with 1 SCADCP
Current meters56° 48' 59" N  6° 30' 59" W — Recovered Muck Hole mooring with 3 RCMs, 8 miniloggers and 3 transmissomers
Current meters57° 31' 59" N  12° 15' 0" W — Recovered mooring F with 5 RCMs. Note: Mooring F recovered on RVS Charles Darwin cruise in April 2000.
Data held at BODC Get data
Discrete samples 
44  CTD frame plus rosette samplerDensity of the water column
Transmittance and attenuance of the water column
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Nitrate concentration parameters in the water column
Dissolved oxygen parameters in the water column
Phosphate concentration parameters in the water column