RV Prince Madog PD25/06

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Cruise Info.

Ship name (ship code)

RV Prince Madog (74P2)

Cruise identifier

PD25/06

Cruise period

2006-08-15 — 2006-08-16

Status

Completed

Port of departure

Menai Bridge, United Kingdom

Port of return

Menai Bridge, United Kingdom

Purpose

Research

Objectives

1) At 53 degrees 32 minutes N 3 degrees 21.8 minutes W, half a mile west of the Mersey Bar Light Vessel (site A)
To recover: (a) A sea bed frame for a 600 kHz ADCP (waves ADCP) to measure the mean current profile, pressures and directional waves (b) A CEFAS SmartBuoy (with cellulose bags) in a single point mooring with Sea-Bird MicroCAT temperature, conductivity loggers at 5m and 10m below the surface.
To deploy: (c) A sea bed frame for a 600 kHz ADCP (waves ADCP) to measure the mean current profile, pressures and directional waves (d) A CEFAS SmartBuoy (with cellulose bags) in a single point mooring with Sea-Bird MicroCAT temperature, conductivity loggers at 5m and 10m below the surface (e) A sea bed frame for a nutrient analyser measuring nitrate and phosphate four times a semi-diurnal tidal cycle.

2) At 53 degrees 27 minutes N 3degrees 38.6 minutes W (site 21, second site, B)
To recover: (f) A sea bed frame for a 600 kHz ADCP (waves ADCP) to measure the mean current profile, pressures and directional waves (g) A CEFAS SmartBuoy (with cellulose bags) in a single point mooring.
To deploy: (h) A sea bed frame for a 600 kHz ADCP (waves ADCP) to measure the mean current profile, pressures and directional waves (i) A CEFAS SmartBuoy (with cellulose bags and trace metal monitor) in a single point mooring.

3. To conduct a CTD / LISST survey of 34 sites 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.
4. To obtain calibration samples for salinity, transmittance, suspended sediment and for chlorophyll at selected stations.
5. To obtain near surface and bed water samples for nutrient and suspended sediment determination.
6. To obtain trace metal water samples.
7. Collect 10 vertical net hauls at mooring site A.
8. To deploy a directional wave buoy at 53 degrees 23.5 minute

Chief scientist

M John Howarth (Proudman Oceanographic Laboratory)

Project

POL Coastal Observatory

Coordinating body

Natural Environment Research Council (NERC)

Cruise report

(0.24 MB)

Ocean/sea areas

General

Irish Sea and St. George's Channel

Specific

Liverpool Bay and eastern Irish Sea

Track charts

(0.11 MB)

Measurements

Physical oceanography

Water bottle stations

Quantity: number of stations = 35
Description: Water samples were taken from a near bed bottle for calibration of the CTD salinity data.

CTD stations

Quantity: number of stations = 35
Description: The Sea-Bird 911 CTD recorded downwelling temperature and conductivity, 3 m above the bed.

CTD stations

Quantity: number of stations = 35
Description: Water samples were taken from a near bed bottle for calibration of the CTD salinity data.

Transparency (eg transmissometer)

Quantity: number of stations = 35
Description: The Sea-Bird 911 CTD recorded downwelling transmittance, 3 m above the bed.

Optics (eg underwater light levels)

Quantity: number of stations = 35
Description: The Sea-Bird 911 CTD recorded downwelling PAR light levels (CEFAS light sensor) 3 m above the bed.

Chemical oceanography

Oxygen

Quantity: number of stations = 35
Description: The Sea-Bird 911 CTD recorded downwelling oxygen (no calibration samples) 3 m above the bed.

Phosphate

Quantity: number of stations = 35
Description: Water samples were taken from the near surface and near bed bottles and frozen for nutrient analysis by NOC

Nitrate

Quantity: number of stations = 35
Description: Water samples were taken from the near surface and near bed bottles and frozen for nutrient analysis by NOC

Silicate

Quantity: number of stations = 36
Description: Water samples were taken from the near surface and near bed bottles and frozen for nutrient analysis by NOC

Contamination

Suspended matter

Quantity: number of stations = 35
Description: Water samples were filtered to determine suspended sediment load and calibrate the CTD transmissometer. Water samples from the second near surface bottle from stations 1 and 21 were filtered suspended sediment determination. Filtrate was preserved with mercuric chloride for nutrient determination, (in addition samples at station 1 were taken for oxygen analysis).

Biology and fisheries

Phytoplankton pigs (eg chlorophyll, fluorescence)

Quantity: number of stations = 35
Description: The Sea-Bird 911 CTD recorded downwelling fluorescence at 24 Hz. 3 m above the bed. Water samples from the second near surface bottle from stations 1 and 21 were filtered for chlorophyll

Meteorology

Routine standard measurements

Quantity: number of samples = 3069
Description: Sea-Bird 16plus S/N 4737 on base of frame with pumped conductivity sensor underneath. SeaPoint turbidity sensor taped to roll bar S/N 10489; set up for 0 - 125 FTU range. Sample interval 600 s; digiquartz integration time 40s, range 400; run pump 0.5s, 1 s delay.

Routine standard measurements

Quantity: number of samples = 6092
Description: Sea-Bird MicroCAT temperature and conductivity recorder Serial number 2991 (RS485) at 5m below the surface. Sample interval 600s. Reference pressure = 25dB. 3048 samples. Serial number 2506 at 10m below the surface. Sample interval 600s. Digiquartz pressure sensor. 3044 samples

Other meteorological measurements

Quantity: activity duration in days = 1
Description: Surface sampling system 3 m below sea level. Parameters recorded every minute by the WS Oceans system: Date, Solar Radiation, PAR, Air Temperature, Relative Humidity, Relative Wind Speed, Relative Wind Direction (zero indicates wind on the bow), Transmissance, Hull Temperature, Barometric Pressure, Fluorescence, Turbidity, Salinity, Minimum Air Temp, Maximum Air Temp, Wind Gust, GPS Time, Latitude, Longitude, Barometric Pressure Minimum, Barometric Pressure Maximum, Conductivity sensor water temperature

Moorings, landers, buoys

Physical oceanography

Current profiler (eg ADCP)

53° 31' 56" N 3° 21' 14" W — Site A: Waves ADCP 600 kHz RDI 5807; battery pack 3285 2974 samples. Water depth 24.2m. Recovery and deployment

Current profiler (eg ADCP)

53° 26' 59" N 3° 38' 39" W — Site B: Waves ADCP 600 kHz RDI 2390. Water depth 23.5m. Recovery and deployment

Surface drifters/drifting buoys

53° 26' 52" N 3° 38' 44" W — Site B: SmartBuoy Mooring fitted with a surface CTD (including turbidity and fluorescence sensors). The frame was fitted with bags for the determination of bacterial degradation. Water depth 23.6 m. Recovery and deployment

Surface drifters/drifting buoys

53° 31' 59" N 3° 21' 36" W — Site A: The CEFAS SmartBuoy is fitted with one surface CTD, light sensors at 1 and 2 m below the surface, a water sampler which obtains water samples once per day for laboratory nutrient (TOXN and silicate; no filtration therefore no phosphate), fluorometer (SeaPoint), oxygen (Aanderaa Optode) and chlorophyll determination and an in situ NAS2E nutrient analyser. Water depth: 25.2m. Recovery and deployment

Data held at BODC

Get data

Series/Profiles

2 Acoustic doppler current profiler

Date and time
Vertical spatial coordinates
Vertical velocity of the water column (currents)
Horizontal velocity of the water column (currents)
Metadata parameters
Sea level

[Show series]

Date and time
Vertical spatial coordinates
Vertical velocity of the water column (currents)
Horizontal velocity of the water column (currents)
Metadata parameters
Sea level

[Hide series]

BODC id	Date/Time	Location	Doc.
1623328	2006-08-15 18:50 — 2006-09-21 10:59:51	53° 32' 1" N 3° 21' 31" W
1623341	2006-08-16 11:00 — 2006-09-22 10:09:36	53° 26' 59" N 3° 38' 37" W

18 Bottle station

Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Quality control flags
Chlorophyll pigment concentrations in water bodies

[Show series]

[Hide series]

BODC id	Date/Time	Location
1655889	2006-08-15 18:01	53° 27' 10" N 3° 22' 31" W
1655908	2006-08-15 19:28	53° 37' 22" N 3° 22' 1" W
1655921	2006-08-15 20:06	53° 42' 2" N 3° 22' 21" W
1312340	2006-08-15 18:01	53° 27' 10" N 3° 22' 31" W
1655877	2006-08-15 10:57	53° 31' 46" N 3° 21' 29" W
1655957	2006-08-16 07:14	53° 26' 59" N 3° 39' 6" W
1655969	2006-08-16 09:28	53° 26' 58" N 3° 38' 14" W
1312339	2006-08-15 10:57	53° 31' 46" N 3° 21' 29" W
1312352	2006-08-15 18:48	53° 32' 9" N 3° 21' 32" W
1312364	2006-08-15 19:28	53° 37' 22" N 3° 22' 1" W
1655945	2006-08-15 21:31	53° 51' 36" N 3° 21' 55" W
1312388	2006-08-15 20:54	53° 47' 10" N 3° 21' 54" W
1312407	2006-08-15 21:31	53° 51' 36" N 3° 21' 55" W
1655933	2006-08-15 20:54	53° 47' 10" N 3° 21' 54" W
1312376	2006-08-15 20:06	53° 42' 2" N 3° 22' 21" W
1312419	2006-08-16 07:14	53° 26' 59" N 3° 39' 6" W
1312420	2006-08-16 09:28	53° 26' 58" N 3° 38' 14" W
1655890	2006-08-15 18:48	53° 32' 9" N 3° 21' 32" W

2 Fluorometers

Reference numbers
Date and time
Raw fluorometer output

[Show series]

Reference numbers
Date and time
Raw fluorometer output

[Hide series]

BODC id	Date/Time	Location	Doc.
747070	2006-08-16 07:30 — 2006-09-07 23:30	53° 27' 2" N 3° 38' 27" W
747125	2006-08-15 13:00 — 2006-09-08 23:30	53° 31' 59" N 3° 21' 47" W

1 In-situ dissolved gas analyser

Reference numbers
Date and time
Dissolved oxygen parameters in the water column

[Show series]

Reference numbers
Date and time
Dissolved oxygen parameters in the water column

[Hide series]

BODC id	Date/Time	Location	Doc.
747309	2006-08-15 13:00 — 2006-09-21 12:00	53° 31' 59" N 3° 21' 47" W

1 In-situ nutrient analyser

Reference numbers
Date and time
Nitrate concentration parameters in the water column

[Show series]

Reference numbers
Date and time
Nitrate concentration parameters in the water column

[Hide series]

BODC id	Date/Time	Location	Doc.
747463	2006-08-22 17:38 — 2006-09-20 05:38	53° 31' 59" N 3° 21' 47" W

2 Moored CTD

Reference numbers
Date and time
Temperature of the water column
Salinity of the water column

[Show series]

Reference numbers
Date and time
Temperature of the water column
Salinity of the water column

[Hide series]

BODC id	Date/Time	Location	Doc.
746957	2006-08-16 07:30 — 2006-09-22 08:30	53° 27' 2" N 3° 38' 27" W
747021	2006-08-15 13:00 — 2006-09-21 12:00	53° 31' 59" N 3° 21' 47" W

2 Nephelometers and optical backscatter sensors

Reference numbers
Date and time
Concentration of suspended particulate material in the water column

[Show series]

Reference numbers
Date and time
Concentration of suspended particulate material in the water column

[Hide series]

BODC id	Date/Time	Location	Doc.
747242	2006-08-15 13:00 — 2006-09-21 12:00	53° 31' 59" N 3° 21' 47" W
747186	2006-08-16 07:30 — 2006-09-07 23:30	53° 27' 2" N 3° 38' 27" W

1 Surface water sample (unspecified)

Reference numbers
Date and time
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column

[Show series]

Reference numbers
Date and time
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column

[Hide series]

BODC id	Date/Time	Location	Doc.
747543	2006-08-16 00:00 — 2006-09-21 00:00	53° 31' 59" N 3° 21' 47" W

2 radiometers

Reference numbers
Date and time
Light extinction and diffusion coefficients
Visible waveband radiance and irradiance measurements in the water column

[Show series]

Reference numbers
Date and time
Light extinction and diffusion coefficients
Visible waveband radiance and irradiance measurements in the water column

[Hide series]

BODC id	Date/Time	Location	Doc.
747358	2006-08-15 13:00 — 2006-09-08 18:30	53° 31' 59" N 3° 21' 47" W
747414	2006-08-15 13:00 — 2006-09-08 18:30	53° 31' 59" N 3° 21' 47" W

Discrete samples

35 CTD frame plus rosette sampler

Transmittance and attenuance of the water column
Nitrite concentration parameters in the water column
Temperature of the water column
Dissolved oxygen parameters in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Concentration of suspended particulate material in the water column
Silicate concentration parameters in the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Ammonium and ammonia concentration parameters in water bodies
Raw light meter output
Raw suspended particulate material concentration sensor output
Raw fluorometer output
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies

4 Instrument mooring

Resources

RV Prince Madog PD25/06

Cruise summary report

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