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RV Prince Madog PD11/04A
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RV Prince Madog (74P2) |
Cruise identifier | PD11/04A |
Cruise period | 2004-03-29 — 2004-03-31 |
Status | Completed |
Port of departure | Menai Bridge, United Kingdom |
Port of return | Birkenhead, United Kingdom |
Purpose | Research |
Objectives | The objectives are to recover moored instrumentation, i.e. STABLE, PMP, Wave Buoy and ADCP frame previously deployed at the mouth of the River Dee. Also to carry out at least a CTD tidal cycle in the Welsh Channel and the Hilbre Swash, to study turbulence and SPM processes.
In the following narrative all times are UMT The Prince Madog was loaded on the 28/03/2004, mainly light boxes and tools, as it is a recovery cruise. We sailed from Menai Bridge at 08:30 on the 29/03/2004, arriving to the Welsh Channel by 12:30. A 13 hour CTD yoyo was carried out sampling every 1/2 hour. The CTD station was finished at 01:00 30/03/2004 to allow the crew to rest for the recovery later in the morning. At 05:20 the anchor was lifted and we proceeded to retrieve the Toroid Marker buoy. Then we tried to retrieve the ADCP frame but it failed to surface so we had to drag for it. It came on board at 06:20. At 06:50 we left for the Hilbre Swash and retrieved the Wave Buoy at 08:20. We anchored to start a 25 hour CTD yoyo at 09:00. 10;00 finished CTD yoyo, recovered PMP, recovered STABLE. |
Chief scientist | Alejandro J Souza (Proudman Oceanographic Laboratory) |
Project | Dee experiment |
Coordinating body | POL |
Ocean/sea areas | |
General | Irish Sea and St. George's Channel |
Specific | Irish Sea; Liverpool Bay; Mouth of the Dee Estuary |
Measurements | |
Physical oceanography | |
Surface measurements underway (T,S) | Description: Underway temp, sal., chlorophyll, transmittance |
CTD stations | Quantity: number of profiles = 76 Description: CTD profiles, supplementary chlorophyll, transmissometer and LISST data |
Current profiler (eg ADCP) | Description: On board ADCP |
Moorings, landers, buoys | |
Physical oceanography | |
Transparency (eg transmissometer) | 53° 22' 7" N 3° 19' 25" W — LISST-100 C recording at 20 min burst every hour at 1.0 m from the bed |
Current meters | 53° 22' 46" N 3° 14' 17" W — S4 current meter |
Current meters | 53° 22' 7" N 3° 19' 25" W — ADV at 60 and 90 cm from the bottom, recording at 12 Hz in 20 minute bursts every hour |
Current profiler (eg ADCP) | 53° 22' 46" N 3° 14' 17" W — Bottom mounted 1.2 MHz RDI ADCP, mode 12 every second; 50 cm bin size 20 min burst |
Current profiler (eg ADCP) | 53° 22' 7" N 3° 19' 25" W — Bottom mounted 1.2 MHz RDI ADCP, mode 12 every second; 50 cm bin size 20 min burst |
Current profiler (eg ADCP) | 53° 27' 0" N 3° 30' 19" W — Bottom mounted 600 kHz, mode 12, every second and 1 m bin, 20 min burst |
Instrumented wave measurements | 53° 32' 9" N 3° 21' 34" W — Triaxis wave rider |
Other physical oceanographic measurements | 53° 23' 24" N 3° 14' 13" W — STABLE |
Data held at BODC | |
Discrete samples | |
77 CTD frame plus rosette sampler | Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Visible waveband radiance and irradiance measurements in the water column Density of the water column Raw light meter output Raw suspended particulate material concentration sensor output Raw fluorometer output |