Cruise inventory

RV Prince Madog PD18/02

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Prince Madog (74P2)
Cruise identifierPD18/02
Cruise period2002-07-13 — 2002-07-20
StatusCompleted
Port of departureMenai Bridge, United Kingdom
Port of returnMenai Bridge, United Kingdom
PurposeResearch
Objectives1. To make measurements of the mass-specific optical properties of the water column on both sides of a front, in order to determine the difference that stratification and mixing make to the underwater light field.
2. To make measurements of the mass-specific optical properties of the water column in waters with both low and high sediment concentration, in order to assess the influence sediment concentration has on the underwater optical signal.
3. To take water samples and optical measurements hourly over a tidal cycle at one point, northwest of Anglesey. This was done in order to determine what level of variability in the underwater light field is due to tidal action and to what extent satellite monitoring of the water column needs to account for tidal action.
4. To examine particle size distributions in the clear waters of the Celtic Sea and the turbid waters off Anglesey.
5. To calibrate the transmissometer on the CTD rosette to provide data on sediment concentration.

All the cruise objectives were successfully accomplished.
Chief scientistAlex Cunningham (University of Strathclyde, Department of Physics)
ProjectNERC Research Programme GR3/12903
Cruise reportRV Prince Madog PD18/02 cruise report pd18_02.pdf — access key 'C' (0.51 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Celtic Sea
SpecificBetween Pembroke/Devon and Ireland
Track chartsRV Prince Madog PD18/02 cruise track — pd18_02trk.pdf (00 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 35
Description: sampled using water bottles attached to CTD. The water samples were filtered for SPM, chlorophyll, yellow substance, particle spectra and particle size.
CTD stationsQuantity: number of stations = 35
Description: worked using CTD lowered to just above the seabed.
Optics (eg underwater light levels)Quantity: number of stations = 35
Description: worked for optical measurements using AC-9 absorption meter.
Current profiler (eg ADCP)Quantity: number of stations = 35
Description: monitored by ADCP, running to obtain current data for each station.
Contamination 
Suspended matterQuantity: number of stations = 35
Description: surveyed using PRR-600 multiband radiometer and SPMR-7 freefalling multiband radiometer.