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

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

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.

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