The dataset has been taken in a box from 3.93°W to 3.22°W and 53.36°N up to 53.86°N. The box lies at the northern end of the Dee Estuary, Liverpool Bay, UK.

Horizontal spatial co-ordinates; Date and time; Air pressure; Atmospheric humidity; Dissolved oxygen parameters in the water column; Raw fluorometer output; Wave direction; Raw current meter output parameters; Vertical velocity of the water column (currents); Bathymetry and Elevation; Suspended particulate material setting velocity parameters; Sediment grain size parameters; Moored instrument depth; Optical backscatter; Salinity of the water column; Sediment acoustics; Side-scan sonar; Temperature of the water column; Concentration of suspended particulate material in the water column; Raw suspended particulate material concentration sensor output; Spectral wave data parameters; Wave height and period statistics; Horizontal platform movement; Acoustic backscatter in the water column; Suspended particulate material grain size parameters; Solar Radiation; Platform or instrument orientation; Electrical conductivity of the water column; Transmittance and attenuance of the water column; Air temperature; Density of the water column; Raw light meter output; Wind strength and direction; Horizontal velocity of the water column (currents)

Anemometers; wave recorders; fluorometers; current profilers; optical backscatter sensors; thermosalinographs; sidescan sonars; single-beam echosounders; benthos samplers; discrete water samplers; continuous water samplers; sediment traps; salinity sensor; sediment grabs; sieves and filters; Differential Global Positioning System receivers; acoustic backscatter sensors; CTD; transmissometers; satellite positioning systems; water body temperature sensor; current meters; water temperature sensor; in-situ particle sizers; dissolved gas sensors; sediment settling tubes; meteorological packages

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.

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