Resources

RV Prince Madog PD48/03

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD48/03
Cruise period2003-12-17 — 2003-12-18
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 a SeaBird MicroCAT 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 (Mean 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 a SeaBird MicroCAT temperature, conductivity logger at 5m below the surface and an Aanderaa temperature and conductivity logger at 10 m below the surface (e) A sea bed frame for a 600 kHz ADCP (Telemtry ADCP) to measure mean current profile and pressures. An acoustic modem was also fitted and linked to the ADCP (f) A surface torroid (Telemetry buoy) with an acoustic modem and an Orbcomm satellite communication system.
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 and grab samples of sediment.
3. At 53° 22'N 3° 55.4'W, Station 34 - to deploy a new WaveBuoy at Station 34 on the outbound leg and to recover it on the inbound leg.

All the mooring objectives were successfully accomplished and 34 out of 35 CTD stations were visited.
Chief scientistPhil J Knight (Proudman Oceanographic Laboratory)
Cruise reportRV Prince Madog PD48/03 cruise report pd48_03.pdf (0.19 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Specificeastern Irish Sea
Track chartsRV Prince Madog PD48/03 cruise track — pd48_03trk.pdf (0.11 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 34
Description: sampled using near surface and near bed bottles for nutrient analysis.
Water bottle stationsQuantity: number of samples = 7
Description: from near surface bottle were filtered for chlorophyll and suspended sediment determination.
CTD stationsQuantity: number of stations = 34
Description: surveyed to determine the effects of the rivers Dee, Mersey and Ribble on Liverpool Bay.
Contamination 
Suspended matterQuantity: number of stations = 34
Description: were surveyed using a LISST-25 particle size analyser.
Geology and geophysics 
GrabQuantity: number of stations = 20
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)53° 32' 0" N  3° 21' 39" W — A sea bed frame for a 600 kHz ADCP was deployed 17/12/2003. to measure the mean current profile, pressures and directional waves.
Current profiler (eg ADCP)53° 31' 59" N  3° 21' 43" W — A sea bed frame for a 600 kHz telemetry ADCP was deployed 17/12/2003 to measure mean current profile and pressures.
Current profiler (eg ADCP)53° 32' 6" N  3° 21' 37" W — A sea bed frame for a 600 kHz ADCP was recovered 17/12/2003 having measured the mean current profile, pressures and directional waves.
Instrumented wave measurements53° 22' 16" N  3° 55' 30" W — A new WaveBuoy was deployed at Station 34 on the outbound leg (17/12/2003) to be recovered on the inbound leg (18/12/2003).
Other physical oceanographic measurements53° 32' 1" N  3° 21' 51" W — A CEFAS SmartBuoy in a single point mooring was deployed 17/12/2003.
Other physical oceanographic measurements53° 31' 57" N  3° 21' 43" W — A surface torroid (Telemetry buoy) was deployed 17/12/2003.
Other physical oceanographic measurements53° 32' 0" N  3° 21' 46" W — A CEFAS SmartBuoy in a single point mooring was recovered 17/12/2003.
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
Visible waveband radiance and irradiance measurements in 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
Raw light meter output
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
4  Instrument mooring
20  Shipek grab