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RV Prince Madog PD35/02

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD35/02
Cruise period2002-12-12 — 2002-12-13
StatusCompleted
Port of departureMenai Bridge, United Kingdom
Port of returnMenai Bridge, United Kingdom
PurposeResearch
Objectives1. 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 and pressures.
A pressure recorder, a transmissometer / conductivity / temperature logger and a SeaBird
MicroCat are 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.
C) A CEFAS Datawell directional wave recorder (single point mooring). This recovery was
necessary to change a section of the mooring and to change the sampling scheme to record
statistics only so that the logger would last 6 months.

To deploy
d) A sea bed frame for a 600 kHz ADCP to measure the mean current profile and pressures.
A pressure recorder, a transmissometer / conductivity / temperature logger and a SeaBird
MicroCat are also fitted to the frame.
E) A sea bed frame for a 600 kHz ADCP (recovery 'a') to measure the mean current profile,
pressures and directional waves.
F) A CEFAS SmartBuoy in a single point mooring with an Aanderaa temperature and
conductivity logger at 10 m below the surface.
G) A CEFAS Datawell directional wave recorder (recovery 'c'), single point mooring.
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 suspended sediment at all stations and for chlorophyll at selected stations.

All of the mooring objectives were accomplished and 31 out of 34 CTD sites visited
Chief scientistM John Howarth (Proudman Oceanographic Laboratory)
ProjectLiverpool Bay Coastal Observatory
Coordinating bodyProudman Oceanographic Laboratory
Cruise reportRV Prince Madog PD35/02 cruise report pd35_02.pdf (0.11 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 8
Description: Water samples filtered for chlorophyll and suspended sediment determination.
CTD stationsQuantity: number of stations = 32
Contamination 
Suspended matterQuantity: number of stations = 31
Description: surveyed using LISST-100 particle sizer.
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)53° 32' 2" N  3° 21' 44" W — A sea bed frame for a 600 kHz ADCP was recovered 12/12/2002 having measured the mean current profile and pressures.
Current profiler (eg ADCP)53° 31' 59" N  3° 21' 40" W — A sea bed frame for a 600 kHz ADCP to measure the mean current profile and pressures was deployed 12/12/2002.
Current profiler (eg ADCP)53° 31' 59" N  3° 21' 21" W — A sea bed frame for a 600 kHz ADCP to measure the mean current profile, pressures and directional waves was deployed 13/12/2002.
Instrumented wave measurements53° 31' 54" N  3° 21' 54" W — A CEFAS Datawell directional wave recorder was recovered 12/12/2002.
Instrumented wave measurements53° 31' 53" N  3° 22' 17" W — A CEFAS Datawell directional wave recorder in a single point mooring was deployed 14/12/2002.
Other physical oceanographic measurements53° 31' 55" N  3° 22' 4" W — A CEFAS SmartBuoy in a single point mooring was recovered 13/12/2002.
Other physical oceanographic measurements53° 31' 55" N  3° 22' 27" W — A CEFAS SmartBuoy in a single point mooring was deployed 12/12/2002.
Data held at BODC Get data
Discrete samples 
33  CTD frame plus rosette samplerTransmittance and attenuance of the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
Raw fluorometer output
Silicate concentration parameters in the water column
Concentration of suspended particulate material in the water column
Salinity of the water column
Temperature of the water column
Nitrate concentration parameters in 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