Planned maintenance — 18th January 2018 12:00 to 22nd January 2018 09:00 [more]

Cruise inventory

RV Prince Madog PD21/10

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD21/10
Cruise period2010-07-07 — 2010-07-08
StatusCompleted
Port of departureBirkenhead, United Kingdom
Port of returnBirkenhead, United Kingdom
PurposeResearch
ObjectivesObjectives

1.1 At site A, 53° 32′ N, 3° 21.8′ W (CTD station 1)
To recover:
a) A seabed frame containing a 600 kHz RDI ADCP (waves ADCP), SeaBird SBE 16plus, digiquartz pressure sensor, SeaPoint turbidity sensor with wiper; a SeaBird SBE 16plus with an Aanderra oxygen Optode and FSI conductivity, temperature logger.
b) CEFAS SmartBuoy in a single point mooring. Attached to the mooring wire are SeaBird MicroCat temperature, conductivity loggers at 5 m and 10 m below the surface and temperature miniloggers at 7.5 m and 15 m below the surface. Also attached was a Contros pCO2 instrument.
To deploy:
a) A seabed frame containing a 600 kHz RDI ADCP (measuring mean current profile, pressures and directional waves), SeaBird SBE 16plus (with pumped conductivity sensor), digiquartz pressure sensor, a SeaPoint turbidity sensor with wiper and SeaBird SBE 16plus (with an Aanderra oxygen Optode).
b) CEFAS SmartBuoy in a single point mooring. Attached to the mooring wire are SeaBird MicroCat temperature, conductivity loggers at 5 m and 10 m below the surface and temperature miniloggers at 7.5 m and 15 m below the surface. Plus a new WetLabs ACS unit and frame at 5m. To collect ten vertical zooplankton hauls for CEFAS.

1.2 At 'new' site B, 53° 32.3′ N, 3° 38.4′ W (CTD station 20)
To recover:
a) A seabed frame containing a 600 kHz RDI ADCP, a SeaBird SBE 16plus, digiquartz pressure sensor and a SeaPoint turbidity sensor fitted with a wiper.
b) A CEFAS SmartBuoy in a single point mooring. Attached to the mooring wire are SeaBird MicroCat temperature, conductivity loggers at 5 m and 10 m below the surface and temperature miniloggers at 7.5 m and 15 m below the surface.
To deploy:
a) A seabed frame for a 600 kHz RDI ADCP measuring mean current profile, pressures and directional waves; a SeaBird SBE 16plus (with pumped conductivity sensor), digiquartz pressure sensor and a SeaPoint turbidity sensor (fitted with a wiper).
b) A CEFAS SmartBuoy in a single point mooring. Attached to the mooring wire are SeaBird MicroCat temperature, conductivity loggers at 5 m and 10 m below the surface and temperature miniloggers at 7.5 m, 15 m and 20 m below the surface.

1.3 CTD and LISST survey
To conduct a CTD survey including LISST measurements at 34 sites every five nautical miles covering the eastern Irish Sea to determine the effects of the rivers Dee, Mersey and Ribble on Liverpool Bay. The survey covers the area from the coast of North Wales to a line extending westwards from Blackpool, and from the Lancashire coast to a line extending northwards from Great Ormes Head.
To obtain calibration samples for salinity, transmittance and suspended sediment at selected stations. To obtain near surface and bed water samples for nutrient (nitrate, phosphate, silicate) and suspended sediment determination. To obtain surface samples for a Defra pH/Alkalinity study by David Hydes (NOC, at Southampton). NOC Liverpool has supplied filtering equipment and filters for determining concentrations of suspended sediment and chlorophyll-a. CDOM samples will be obtained at some sites.

1.4 Other activities
Collect sediment samples at each CTD site with a Day grab for Andy Plater (University of Liverpool) and Ken Pye (Royal Holloway College). Ken Pye's samples were taken at sites that were missed on the previous cruise.

A pCO2 instrument was installed prior to the survey.

Collect samples for trace metal analysis, for in situ analysis and lab analysis.
Chief scientistPhil J Knight (National Oceanography Centre, Liverpool)
ProjectNOC Coastal Observatory
Coordinating bodyNational Oceanography Centre
Cruise reportRV Prince Madog PD21/10 cruise report pd21_10.pdf — access key 'C' (0.12 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificLiverpool Bay, Irish Sea
Data held at BODC 
Discrete samples 
37  CTD frame plus rosette samplerAmmonium and ammonia concentration parameters in water bodies
Raw suspended particulate material concentration sensor output
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
Electrical conductivity of the water column
Silicate concentration parameters in the water column
Raw fluorometer output
Raw in-situ nutrient analyser output
Salinity of the water column
Concentration of suspended particulate material in the water column
Raw oxygen sensor output
Nitrate concentration parameters in the water column
Temperature of the water column
Raw light meter output
Phaeopigment concentrations in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Dissolved oxygen parameters in the water column