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RV Prince Madog PD37/03
Cruise plan
Cruise Info. | |
Ship name (ship code) | RV Prince Madog (74P2) |
Cruise identifier | PD37/03 |
Cruise period | 2003-09-12 — 2003-09-20 |
Status | Completed |
Port of departure | Menai Bridge, United Kingdom |
Port of return | Menai Bridge, United Kingdom |
Purpose | Research |
Objectives | Outline of science objectives:
The cruise aims to measure water-leaving radiance using above-water optical sensors and calibrate them against water quality parameters through the measurement of phytoplankton pigments, suspended sediment load, yellow substance and water clarity. These are sea trials aimed at finalising protocols before placing instruments on board the Irish Ferries Ulysses for long term monitoring of water quality. The cruise will be run jointly with a second project CASIX which aims to make measurements of phytoplankton and suspended matter properties including particle size to try to further understand primary productivity and carbon fluxes in shelf seas. Main cruise objectives: 1) Obtain continuous measurements of above-water reflectance (RAMSES) along the Irish Ferries Ulysses route from Holyhead to Dublin during daylight hours (see attached map). 2) Measure water quality parameters (chlorophyll, suspended sediment load, yellow substance, nutrients and water clarity) in order to calibrate the radiometers for the independent determination of water quality and for validation of the POL ERSIM model. 3) Measure in situ water-leaving radiance (Floating RAMSES) to determine accuracy of above-water methods. 4) Obtain tidal cycles of phytoplankton abundance and physiology (FRRF), SPM concentration and particle sizes (LISST) on stations in the western Irish Sea gyre and off Holyhead (see attached map). 5) Deploy settling velocity tubes at tidal stations 6) Obtain in situ profiles of spectral reflectance (PRR600 and Micro-PRO) for inter-calibration of radiometers. |
Chief scientist | E Gay Mitchelson-Jacob (University of Wales, Bangor School of Ocean Sciences) |
Project | Centre for Air-Sea Interactions and Fluxes/EU Ireland-Wales INTERREG Program |
Coordinating body | Welsh European Funding Office (for INTERREG) |
Ocean/sea areas | |
General | Irish Sea and St. George's Channel |
Specific | Irish Sea |
Track charts | (0.10 MB) |
Measurements | |
Physical oceanography | |
Water bottle stations | Quantity: number of profiles = 71 Description: Sampling of water at depths using water bottles on CTD rosette |
CTD stations | Quantity: number of profiles = 71 Description: Measure temperature profiles by CTD |
CTD stations | Quantity: number of profiles = 71 Description: Measure salinity profiles by CTD |
CTD stations | Quantity: number of profiles = 71 Description: Measure fluorescence profiles by CTD |
CTD stations | Quantity: number of profiles = 71 Description: Measure transmittance profiles by CTD |
Transparency (eg transmissometer) | Quantity: number of profiles = 27 Description: Measurement of diffuse attenuation coefficients at SeaWiFS wavelengths |
Transparency (eg transmissometer) | Quantity: number of profiles = 46 Description: Measurement of diffuse attenuation coefficients at MERIS wavelengths |
Transparency (eg transmissometer) | Quantity: number of measurements = 48 Description: Secchi Depth |
Optics (eg underwater light levels) | Quantity: number of profiles = 46 Description: Measurement of in-situ profiles of spectral remote sensing reflectance at MERIS wavelengths with Satlantic MicroPro freefall radiometer |
Optics (eg underwater light levels) | Quantity: number of measurements = 57 Description: In-situ water leaving radiance with TRIOS in-water sensor |
Optics (eg underwater light levels) | Quantity: number of measurements = 57 Description: Above-water reflectance using TRIOS radiometer |
Optics (eg underwater light levels) | Quantity: number of profiles = 27 Description: Measurement of in-situ profiles of spectral remote sensing reflectance at SeaWiFS wavelengths with PRR-600 profiling radiometer |
Other physical oceanographic measurements | Quantity: number of profiles = 37 Description: Measure SPM volume-specific particle size classes with LISST-100 |
Other physical oceanographic measurements | Quantity: number of samples = 58 Description: Sampling particulate absorption by filter pad technique at surface |
Other physical oceanographic measurements | Quantity: number of samples = 11 Description: Sampling particulate absorption by filter pad technique at depth |
Other physical oceanographic measurements | Quantity: number of samples = 55 Description: Sampling for particle settling velocity |
Chemical oceanography | |
Phosphate | Quantity: number of samples = 129 Description: Sampling for phosphate at depth |
Phosphate | Quantity: number of samples = 150 Description: Sampling for phosphate at surface |
Nitrate | Quantity: number of samples = 129 Description: Sampling for nitrate at depth |
Nitrate | Quantity: number of samples = 150 Description: Sampling for nitrate at surface |
Nitrite | Quantity: number of samples = 150 Description: Sampling for nitrite at surface |
Nitrite | Quantity: number of samples = 129 Description: Sampling for nitrite at depth |
Ammonia | Quantity: number of samples = 129 Description: Sampling for ammonia at depth |
Ammonia | Quantity: number of samples = 150 Description: Sampling for ammonia at surface |
Silicate | Quantity: number of samples = 150 Description: Sampling for silicate at surface |
Silicate | Quantity: number of samples = 129 Description: Sampling for silicate at depth |
Biology and fisheries | |
Primary productivity | Quantity: number of profiles = 37 Description: Measurement of photosynthetic response with FRRF variable fluorescence fluorometer |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 24 Description: Sampling for chlorophyll at surface, analysis by HPLC |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 4 Description: Sampling for chlorophyll at depth, analysis by HPLC |
Dissolved organic matter (inc DOC) | Quantity: number of samples = 58 Description: Sampling for CDOM at surface, analysis by spectrophotometry |
Phytoplankton | Quantity: number of samples = 34 Description: Sampling for phytoplankton concentration and type at surface |
Phytoplankton | Quantity: number of samples = 11 Description: Sampling for phytoplankton concentration and type at depth |
Seston | Quantity: number of samples = 144 Description: Sampling for SPM at depth, analysis by weight and ignition |
Seston | Quantity: number of samples = 197 Description: Sampling for SPM at surface, analysis by weight and ignition |
Moorings, landers, buoys | |
Physical oceanography | |
Current profiler (eg ADCP) | 53° 34' 57" N 5° 46' 56" W — Sea-bed deployed ADCP mooring, deployed 12/09/03, recovered 16/09/03. Station identifier: Station G. |
Current profiler (eg ADCP) | 53° 23' 2" N 4° 41' 57" W — Sea-bed deployed ADCP mooring, deployed 12/09/03, recovered 20/09/03. Station identifier: Station H. |