European Directory of Marine Environmental Data (EDMED)

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Data set name

Hydrographic and biogeochemical dataset from 'A thermocline nutrient pump', Celtic Sea, Summer 2010

Data holding centreBritish Oceanographic Data Centre
CountryUnited Kingdom  United Kingdom
Time periodSummer 2010 (02/06/2010-26/06/2010)
Geographical area

Overall dataset comprises measurements made as far north as Clyde Estuary, and then carrying on south into Irish Sea and Celtic Sea. The main study area, which comprises the majority of the dataset, is based in the Celtic Sea.


Transmittance and attenuance of the water column; Air pressure; Air temperature; Atmospheric humidity; Electrical conductivity of the water column; Unclassified pigment concentrations in sediment; Chlorophyll pigment concentrations in water bodies; Dissolved organic carbon concentration in the water column; Turbulence in the water column; Raw fluorometer output; Platform or instrument orientation; Bathymetry and Elevation; Nitrite concentration parameters in the water column; Other meteorological measurements; Phosphate concentration parameters in the water column; Primary production in the water column; Sea level expressed as pressure; Horizontal velocity of the water column (currents); Density of the water column; Dissolved total and organic nitrogen concentrations in the water column; Dissolved total or organic phosphorus concentration 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; Phaeopigment concentrations in the water column; Salinity of the water column; Temperature of the water column; Nitrate concentration parameters in the water column; Silicate concentration parameters in the water column; Solar Radiation; Dissolved oxygen parameters in the water column; Horizontal spatial co-ordinates


Anemometers; meteorological packages; fluorometers; current meters; current profilers; radiometers; CTD undulators; thermosalinographs; plankton nets; benthos samplers; atmospheric radiometers; salinity sensor; dissolved gas sensors; ADVs and turbulence probes; sediment grabs; autoanalysers; balances and scales; bench fluorometers; Differential Global Positioning System receivers; nutrient analysers; microstructure sensors; CTD; transmissometers; discrete water samplers; water body temperature sensor


The programme ‘A thermocline nutrient pump’ dataset comprises hydrographic, biogeochemical, biological and meteorological data. Hydrographic profiles, towed and underway measurements and point sources provided information on free-fall turbulence data, current velocities and acoustic backscatter, water column structure including temperature and salinity, the underwater light field, fluorescence and dissolved oxygen. A comprehensive biogeochemical water sampling programme provided details on nutrients, primary productivity, dissolved organic matter and phytoplankton pigments. Biological samples such as zooplankton were obtained from the water column using nets, and from the sea-bed using grabs. Bathymetry and meteorological parameters were measured across the study area. Data collection was undertaken in the Clyde Estuary, the Irish Sea and St Georges Channel and the Celtic Sea, including the territorial waters of the UK and the Republic of Ireland. The data were collected during the period 02 – 26 June 2010 during RRS Discovery cruise D352. Measurements were taken using a variety of instrumentation, including conductivity-temperature-depth (CTD) profilers with attached auxiliary sensors, bathymetric echosounders, water bottle samplers, nets, acoustic Doppler current profilers (ADCPs), remote access water samplers, towed undulators, free-fall turbulence profilers, temperature loggers, grabs and ship flow-through and meteorological packages. The project focused on the effects of wind stress at the sea surface, creating inertial oscillations and shear and mixing across the thermocline. The project also aimed to investigate the mixing in the context of supplying nutrients to the sub-surface layer of phytoplankton commonly seen within the shelf seas in summer, and to assess any possible shifts in the phytoplankton ecology as a response to the supply of nutrients.  The programme ‘A thermocline nutrient pump’ was undertaken jointly by the School of Ocean Sciences, University of Wales Bangor and the Proudman Oceanographic Laboratory (POL), now the National Oceanography Centre, Liverpool (NOCL). CTD and Sea-Soar data from the programme are held at the British Oceanographic Data Centre. Other data have not yet been supplied.

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
Collating centreBritish Oceanographic Data Centre
Local identifier1048ThermNutPump
Global identifier6068
Last revised2017-01-30