European Directory of Marine Environmental Data (EDMED)

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Data set name

Cruise datasets generated for project 'Physical-Biological Control of New Production within the Seasonal Thermocline' in the Celtic Sea, July 2003 - July 2005

Data holding centreBritish Oceanographic Data Centre
CountryUnited Kingdom  United Kingdom
ProjectPhysical-Biological Control of New Production within the Seasonal Thermocline(Season_thermocline_prod_contr)
Time periodFrom 25 July 2003 to 06 August 2005
Geographical area

The dataset has been taken in a box from 10° 15’W to 5° 25’W and 48° 26’N up to 52° 34’N. This area comprises the Celtic Sea, some stations just beyond the shelf-edge immediately west of the Celtic Sea and St Georges Channel between Ireland and Wales.


Horizontal spatial co-ordinates; Transmittance and attenuance of the water column; Date and time; Air pressure; Air temperature; Atmospheric humidity; Variable fluorescence parameters; Electrical conductivity of the water column; Chlorophyll pigment concentrations in water bodies; Dissolved organic carbon uptake and production in the water column; Dissolved oxygen parameters in the water column; Wind strength and direction; Raw fluorometer output; Platform or instrument orientation; Concentration of dissolved organic matter in the water column; Raw current meter output parameters; Vertical velocity of the water column (currents); Raw light meter output; Bathymetry and Elevation; Dissolved metal concentrations in the water column; Nitrate concentration parameters in the water column; Optical backscatter; Phosphate concentration parameters in the water column; Light absorption in the water column; Primary production in the water column; Salinity of the water column; Horizontal velocity of the water column (currents); Silicate concentration parameters in the water column; Suspended particulate material grain size parameters; Temperature of the water column; Concentration of suspended particulate material in the water column; Raw suspended particulate material concentration sensor output; Visible waveband radiance and irradiance measurements in the atmosphere; Visible waveband radiance and irradiance measurements in the water column; Ammonium and ammonia concentration parameters in water bodies; Solar Radiation; Turbulence in the water column


Anemometers; meteorological packages; fluorometers; current profilers; radiometers; optical backscatter sensors; transmissometers; CTD undulators; thermosalinographs; water temperature sensor; particle sizers; single-beam echosounders; nutrient analysers; microstructure sensors; discrete water samplers; ocean colour radiometers; continuous water samplers; particulates samplers; salinity sensor; dissolved gas sensors; shipboard incubators; sieves and filters; autoanalysers; high performance liquid chromatographs; bench fluorometers; particle sizers; Differential Global Positioning System receivers; CTD; satellite positioning systems; water body temperature sensor


This dataset comprises measurements of primary productivity, nutrient, optics and water column structure data (including turbulence information) collected from the Celtic Sea and nearby shelf-edge during 25 July to 14 August 2003 and 15 July to 06 August 2005. Compatible, high-resolution vertical profiles of physical, chemical, and biological parameters were obtained. These were collected by deployments of a conductivity-temperature-depth (CTD) sensor package, a Fast Light Yo-yo (FLY) turbulence profiler and SeaSoar profiler sections, thus allowing quantification of vertical fluxes and primary production on tidal and internal wave time scales. During the CTD profiles, water samples were taken and analysed for nutrients, chlorophyll, primary productivity, sediment concentration, coloured dissolved organic matter (CDOM), trace metal concentrations, dissolved oxygen and salinity. Optical profiles were also taken during 2005 using two radiometers; a Biospherical Instruments PRR-600 and a Satlantic MicroPro. In addition, acoustic Doppler current profiler (ADCP) moorings were deployed around the Celtic Sea to measure current and temperature profiles. The main aim was to investigate the generation and dissipation of turbulence in the thermocline, and to quantify how the resulting mixing (supplying nutrients and controlling the light experienced by the algae) affects the growth of phytoplankton within the sub-surface chlorophyll maximum. The data were collected by the Proudman Oceanographic Laboratory (now the National Oceanography Centre) and by Bangor University. Data management was provided by the British Oceanographic Data Centre.

OriginatorsProudman Oceanographic Laboratory
Data web site
OrganisationBritish Oceanographic Data Centre
ContactPolly Hadžiabdić (Head of the BODC Requests Team)

British Oceanographic Data Centre
Joseph Proudman Building 6 Brownlow Street
L3 5DA
United Kingdom

Telephone+44 (0) 782 512 0946
Facsimile+44 (0) 151 795 4912
Collating centreBritish Oceanographic Data Centre
Global identifier4277
Last revised2017-02-14