The data set comprises time series measurements from offshore pressure gauges mounted on the sea floor. The data holdings are approximately 250 observation months from 100 sites. The data have mainly been collected in the continental shelf seas around the British Isles. Data records contain date/time, total pressure and, occasionally, temperature. The sampling interval is typically 15 minutes or hourly, over deployment periods ranging from 1 to 6 months. Data were collected mainly by the Proudman Oceanographic Laboratory (POL), now the National Oceanography Centre (NOC) at Liverpool, and are managed by the British Oceanographic Data Centre (BODC).

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.

This dataset comprises of suspended sediment, sediment transport and water column structure data collected at two sites in the mouth of the Dee Estuary, Liverpool Bay during February and March of every year from 2005 to 2009. Throughout each data collection cruise the RV Prince Madog underway monitoring system recorded latitude, longitude, ship speed and heading, depth, air temperature, air pressure, humidity, wind speed and direction, photosynthetically active radiation (PAR), sea temperature and salinity, beam transmission, fluorescence and, for 2009, dissolved oxygen concentration. At each site visit profiles of the water column were made over a 25 hour tidal cycle using a conductivity-temperature-depth (CTD) sensor package. Measurements include temperature, salinity, PAR, beam attenuation, particle scattering and transmission, fluorescence, and oxygen concentration. Additionally samples of salinity, suspended particulate matter and in-situ temperature at discrete depths within the water column were obtained and grab samples were taken from the sea-bed after each CTD cast. The RV Prince Madog also performed side-scan sonar tows. During the February cruises mooring frames were deployed on the sea-bed. These frames provided current profiles, particle size information, particle scattering information, bed ripple profiles, sediment settling velocity and temperature, salinity and pressure at each site. The mooring frames were recovered during the March cruises. The main aim of this research was to assess and advance the latest marine sediment transport models. These data allow this assessment to be made by providing information on the complex inter-dependence of sediment processes in the bottom boundary layer. The data were collected by the Proudman Oceanographic Laboratory (now the National Oceanography Centre). Data management was provided by the British Oceanographic Data Centre.

This dataset comprises 341 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, in June 1990 from stations covering the southern North Sea and English Channel. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Proudman Oceanographic Laboratory as part of the North Sea Project Blooms/Chemistry Process Study.

This dataset comprises 84 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, in February 2008 from 2 sites over 25 hour tidal cycles, in Welsh and Hilbre Channels of the Dee Estuary. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Proudman Oceanographic Laboratory as part of the Proudman Oceanographic Laboratory Dee Experiment.

This dataset comprises 39 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, during December 1997 - January 1998 from stations on the continental shelf and slope off NW Portugal and Spain. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Proudman Oceanographic Laboratory as part of the Ocean Margin Exchange (OMEX) II project.

This dataset comprises 88 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, in May 1990 from stations covering the southern North Sea (south of 56N). A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Proudman Oceanographic Laboratory as part of the North Sea Project.

This dataset comprises 94 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, in February 2009 from 2 sites over 25 hour tidal cycles, in Welsh and Hilbre Channels. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Proudman Oceanographic Laboratory as part of the Proudman Oceanographic Laboratory Dee Experiment.

This dataset comprises 89 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, in March 2009 from 2 sites over 19 and 25 hour tidal cycles, in Welsh and Hilbre Channels of the Dee Estuary. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Proudman Oceanographic Laboratory as part of the Proudman Oceanographic Laboratory Dee Experiment.

This dataset comprises 20 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, during 24 July to 15 August 2006 along two lines, one running approximately southwest from the Grand Banks, and a second running approximately southeast on the continental slope in front of Nova Scotia. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Proudman Oceanographic Laboratory as part of the Rapid Climate Change programme.