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RV Prince Madog PD23/03A

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD23/03A
Cruise period2003-05-26 — 2003-05-27
StatusCompleted
Port of departureMenai Bridge, United Kingdom
Port of returnMenai Bridge, United Kingdom
PurposeResearch
ObjectivesA. At 53° 32'N 3° 21.8'W, half a mile west of the Mersey Bar Light Vessel:

To recover: (1) 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 are fitted to the frame; (2) A sea bed frame for a 1.2 MHz ADCP to measure fast sample current profiles and pressures; (3) A CEFAS SmartBuoy in a single point mooring with an Aanderaa temperature and conductivity logger at 10 m below the surface; (4) A CEFAS wave buoy; (5) A trial spar buoy mooring.

To deploy: (1) 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 are also fitted to the frame; (2) A CEFAS SmartBuoy in a single point mooring with an Aanderaa temperature and conductivity logger at 10 m below the surface; (3) A CEFAS wave buoy (recovered at 4)).

B. 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 suspended sediment at all stations and for chlorophyll at selected stations.

C. To obtain grab samples at stations 23-24 for the University of Lancaster.

All the mooring objectives were achieved, 32 out of 34 CTD sites were visited and 9 out of 12 grab samples were obtained.
Chief scientistM John Howarth (Proudman Oceanographic Laboratory)
Cruise reportRV Prince Madog PD23/03A cruise report pd23_03.pdf (0.16 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Specificeastern Irish Sea
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 7
Description: Water bottle samples taken to be filtered for chlorophyll and suspended sediment determination.
CTD stationsQuantity: number of stations = 32
Description: To determine the effects of the rivers, Dee, Mersey and Ribble on Liverpool Bay.
Contamination 
Suspended matterQuantity: number of stations = 32
Description: surveyed using LISST-25 particle sizer.
Geology and geophysics 
GrabQuantity: number of stations = 9
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)53° 32' 13" N  3° 22' 0" W — A sea bed frame for a 600 kHz ADCP was deployed 26/05/2003 to measure the mean current profile, pressures and directional waves.
Current profiler (eg ADCP)53° 32' 12" N  3° 22' 16" W — A sea bed frame for a 600 kHz ADCP was recovered 26/05/2003 having measured the mean current profile, pressures and directional waves.
Current profiler (eg ADCP)53° 32' 2" N  3° 21' 23" W — A sea bed frame for a 1.2 MHz ADCP was recovered 26/05/2003 having measured fast sample current profiles and pressures.
Instrumented wave measurements53° 32' 1" N  3° 22' 17" W — A CEFAS WaveBuoy was recovered 26/05/2003.
Instrumented wave measurements53° 32' 9" N  3° 21' 21" W — A CEFAS wave buoy was deployed 26/05/2003, to be recovered later on same day.
Other physical oceanographic measurements53° 32' 24" N  3° 22' 28" W — A CEFAS SmartBuoy in a single point mooring was deployed 26/05/2003.
Other physical oceanographic measurements53° 32' 16" N  3° 22' 18" W — A CEFAS SmartBuoy in a single point mooring was recovered 26/05/2003.
Other physical oceanographic measurements53° 32' 13" N  3° 21' 48" W — A trial spar buoy mooring was recovered 26/05/2003.
Data held at BODC Get data
Discrete samples 
32  CTD frame plus rosette samplerTransmittance and attenuance of the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Concentration of suspended particulate material in the water column
Silicate concentration parameters in the water column
Density of the water column
Raw fluorometer output
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Raw suspended particulate material concentration sensor output
Chlorophyll pigment concentrations in water bodies
2  Instrument mooring