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RV Prince Madog PD06/04

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD06/04
Cruise period2004-02-24 — 2004-02-25
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 CEFAS wave buoy (replace batteries) (b) 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 (c) A CEFAS SmartBuoy in a single point mooring with an Aanderaa temperature and conductivity logger at 10 m below the surface (d) A surface torroid (Telemetry buoy) with an acoustic modem and an Orbcomm satellite communication system (e) A sea bed frame for a 600 kHz ADCP (Telemetry ADCP) to measure mean current profile and pressures. An acoustic modem was also fitted and linked to the ADCP.
To deploy: (f) Deploy a Rapid Lander (on test - recovery planned 2 March) (g) 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 (h) 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 (i) A CEFAS wave buoy (j) A sea bed frame for a 600 kHz ADCP (Telemetry ADCP) to measure mean current profile and pressures. An acoustic modem was also fitted and linked to the ADCP (k) 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, suspended sediment and for chlorophyll at selected stations. To obtain water samples for nutrient determination.

Most of the mooring objectives were completed and most of the CTD sites were visited.
Chief scientistPhil J Knight (Proudman Oceanographic Laboratory)
Cruise reportRV Prince Madog PD06/04 cruise report pd06_04.pdf (0.18 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificHalf a mile west of the Mersey Bar Light Vessel
Track chartsRV Prince Madog PD06/04 cruise track — pd06_04trk.pdf (0.10 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of samples = 7
Description: from near surface bottle were filtered for chlorophyll and suspended sediment determination.
Water bottle stationsQuantity: number of stations = 14
Description: sampled from near surface and near bed bottles for suspended sediment nutrient analysis.
CTD stationsQuantity: number of stations = 29
Description: surveyed to determine the effects of the rivers Dee, Mersey and Ribble on Liverpool Bay.
Contamination 
Suspended matterQuantity: number of stations = 29
Description: surveyed using a LISST-25 particle size analyser.
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)53° 31' 54" N  3° 21' 41" W — A sea bed frame for a 600 kHz ADCP was deployed 24/02/2004 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 recovered 24/02/2004 having measured mean current profile and pressures.
Current profiler (eg ADCP)53° 32' 0" N  3° 21' 39" W — A sea bed frame for a 600 kHz ADCP was recovered 24/02/2004 having measured the mean current profile, pressures and directional waves.
Other physical oceanographic measurements53° 32' 5" N  3° 21' 35" W — A CEFAS SmartBuoy in a single point mooring was deployed 24/02/2004.
Other physical oceanographic measurements53° 31' 47" N  3° 20' 49" W — A Rapid Lander was deployed on test 24/02/2004, with recovery planned for 02/03/2004.
Other physical oceanographic measurements53° 32' 1" N  3° 21' 51" W — A CEFAS SmartBuoy in a single point mooring was recovered 24/02/2004.
Other physical oceanographic measurements53° 31' 57" N  3° 21' 43" W — A surface torroid (Telemetry buoy) was recovered 24/02/2004.
Data held at BODC Get data
Discrete samples 
30  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
Visible waveband radiance and irradiance measurements in the water column
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Raw fluorometer output
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
Dissolved oxygen 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
4  Instrument mooring