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RV Prince Madog PD44/03

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD44/03
Cruise period2003-10-28 — 2003-10-29
StatusCompleted
Port of departureMenai Bridge, United Kingdom
Port of returnMenai Bridge, United Kingdom
PurposeResearch
ObjectivesObjectives
1. At 53° 32´ N 3° 21.8´ W, half a mile west of the Mersey Bar Light Vessel
To recover: (a) A sea bed frame for a 600 kHz ADCP to measure the mean current profile, pressures and directional waves. A pressure recorder, a transmissometer/ conductivity/temperature logger and two SeaBird MicroCATs were fitted to the frame (b) A CEFAS SmartBuoy in a single point mooring with an Aanderaa temperature and conductivity logger at 10 m below the surface.
To deploy: (c) A sea bed frame for a 600 kHz ADCP to measure the mean current profile, pressures and directional waves. A pressure recorder, a transmissometer/ conductivity/temperature logger and a SeaBird MicroCAT were also fitted to the frame (d) A CEFAS SmartBuoy in a single point mooring with an Aanderaa temperature and conductivity logger at 10 m below the surface.
2. To conduct a CTD/LISST survey of 34 stations every 5 miles covering the eastern Irish Sea between the North Wales coast and Blackpool and the Lancashire coast and the Great Orme, to determine the effects of the rivers Dee, Mersey and Ribble on Liverpool Bay. To obtain calibration samples for salinity, transmittance, and for chlorophyll at selected stations. To obtain water samples for nutrient determination.

All of the mooring objectives were successfully completed and all the CTD sites were visited.
Chief scientistM John Howarth (Proudman Oceanographic Laboratory)
Cruise reportRV Prince Madog PD44/03 cruise report pd44_03.pdf (0.18 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Specificeastern Irish Sea
Track chartsRV Prince Madog PD44/03 cruise track — pd44_03trk.pdf (0.10 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 34
Description: Water bottle samples frozen for nutrient analysis by SOC
Water bottle stationsQuantity: number of stations = 7
Description: Water Bottle Samples filtered for chlorophyll and suspended sediment determination.
CTD stationsQuantity: number of stations = 34
Description: CTD survey to determine the effects of the rivers Dee, Mersey and Ribble on Liverpool Bay.
Contamination 
Suspended matterQuantity: number of stations = 34
Description: surveyed using LISST-25 particle sizer.
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)53° 32' 6" N  3° 21' 37" W — A sea bed frame for a 600 kHz ADCP was recovered 28/10/2003 having measured the mean current profile, pressures and directional waves , having been deployed 16/10/2003.
Other physical oceanographic measurements53° 32' 0" N  3° 21' 43" W — A sea bed frame for a 600 kHz ADCP measuring the mean current profile, pressures and directional waves was deployed 28/10/2003.
Other physical oceanographic measurements53° 32' 1" N  3° 21' 43" W — A CEFAS SmartBuoy in a single point mooring was deployed 28/10/2003.
Other physical oceanographic measurements53° 32' 4" N  3° 21' 42" W — A CEFAS SmartBuoy in a single point mooring which had been deployed on cruise PD38/03 was recovered 28/10/2003.
Data held at BODC Get data
Discrete samples 
35  CTD frame plus rosette samplerAmmonium and ammonia concentration parameters in water bodies
Raw suspended particulate material concentration sensor output
Density of the water column
Transmittance and attenuance of the water column
Chlorophyll pigment concentrations in water bodies
Raw fluorometer output
Silicate concentration parameters in the water column
Salinity of the water column
Concentration of suspended particulate material in the water column
Nitrate concentration parameters in the water column
Temperature of the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Phaeopigment concentrations in the water column
2  Instrument mooring