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RV Prince Madog PD29/04

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD29/04
Cruise period2004-07-20 — 2004-07-21
StatusCompleted
Port of departureMenai Bridge, United Kingdom
Port of returnMenai Bridge, United Kingdom
PurposeResearch
Objectives1. To service an ADCP and a SmartBuoy at 53 32 N 3 21.8 W.
2. To obtain CTD profiles and water samples at the Coastal Observatory sites.
The cruise is the 19th in a series starting in August 2002 to maintain the moorings in objective (1) and to steam round a CTD grid in Liverpool Bay/the eastern Irish Sea, objective (2).
Chief scientistPhil J Knight (Proudman Oceanographic Laboratory)
Cruise reportRV Prince Madog PD29/04 cruise report pd29_04.pdf (0.13 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificLiverpool Bay; eastern Irish Sea
Track chartsRV Prince Madog PD29/04 cruise track — pd29_04trk.pdf (0.10 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 380
Description: Underway thermosalinograph
Water bottle stationsQuantity: number of stations = 35
Description: Lab analysis for nitrate (H24), phosphate (H22), silicate (H26), near bed & near surface
CTD stationsQuantity: number of profiles = 36
Description: SeaBird CTD
Transparency (eg transmissometer)Quantity: track kilometres = 380
Description: Underway transmissometer
Transparency (eg transmissometer)Quantity: number of profiles = 36
Description: Transmissometer and LISST on CTD
Optics (eg underwater light levels)Quantity: number of profiles = 36
Description: Irradiance sensors on CTD
Contamination 
Suspended matterQuantity: number of stations = 35
Description: Filtration of near surface and near bed water samples
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 36
Description: Fluorometer on CTD
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 380
Description: Underway fluorimeter
PhytoplanktonQuantity: number of stations = 7
Description: Lab analysis for phytoplankton from water bottle samples
ZooplanktonQuantity: number of hauls = 10
Description: Vertical net hauls for zooplankton
Meteorology 
Incident radiationQuantity: track kilometres = 380
Description: Underway surface irradiance and PAR measurement
Routine standard measurementsQuantity: track kilometres = 380
Description: Met station (wind, atmospheric pressure, air temperature, humidity)
Moorings, landers, buoys 
Physical oceanography 
CTD stations53° 32' 3" N  3° 21' 42" W — Aanderaa logger under Smartbuoy. Recovery and deployment.
CTD stations53° 31' 57" N  3° 21' 46" W — SeaBird micro cat logger on a bottom frame. Recovery and deployment.
CTD stations53° 32' 3" N  3° 21' 42" W — SeaBird micro cat logger under Smartbuoy. Recovery and deployment.
Transparency (eg transmissometer)53° 31' 57" N  3° 21' 46" W — SeaTech 25 cm transmissometer on a bottom frame. Recovery and deployment.
Optics (eg underwater light levels)53° 32' 3" N  3° 21' 42" W — Buoy mounted subsurface irradiance sensors. Recovery and deployment.
Current profiler (eg ADCP)53° 31' 57" N  3° 21' 46" W — 600 kHz ADCP in a sea bed frame, 10 min averages 35 x 1m bins from 2.65 mab. Turn round.
Sea level (inc. bot. press., inverted echosounder)53° 31' 57" N  3° 21' 46" W — Bottom pressure recorder. Recovery and deployment.
Chemical oceanography 
Nitrate53° 32' 3" N  3° 21' 46" W — Buoy mounted nutrient analyser and water sampler. Recovery and deployment.
Nitrite53° 32' 3" N  3° 21' 42" W — Buoy mounted nutrient analyser and water sampler. Recovery and deployment.
Silicate53° 32' 3" N  3° 21' 42" W — Buoy mounted nutrient analyser and water sampler. Recovery and deployment.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)53° 32' 3" N  3° 21' 42" W — Buoy mounted fluorometer. Recovery and deployment.
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
Visible waveband radiance and irradiance measurements in the water column
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
Concentration of suspended particulate material in the water column
Salinity of the water column
Temperature of the water column
Raw light meter output
Nitrate concentration parameters in 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
2  Instrument mooring