North East Atlantic (along 20° W, between 30° N and 53° N)

Ammonium and ammonia concentration parameters in water bodies; Variable fluorescence parameters; Electrical conductivity of the water column; Dissolved oxygen parameters in the water column; Raw fluorometer output; Salinity of the water column; Nitrite concentration parameters in the water column; Dissolved trace metalloid and inorganic selenium concentrations in water bodies; Particulate trace metalloid and inorganic selenium concentrations in water bodies; Transmittance and attenuance of the water column; Silicate concentration parameters in the water column; Temperature of the water column

Fluorometers; nutrient analysers; discrete water samplers; continuous water samplers; elemental analysers; spectrophotometers; transmissometers; CTD

This data set was collected on RRS Challenger cruise 76/90 and comprises an investigation into the distribution and chemical speciation of trace metals in the North Atlantic, supported by NERC research grants. Continuous measurements were collected of fluorescence and transmittance from the ship's non-toxic supply along the entire cruise track. Nineteen CTD casts were taken at 13 stations, mostly taking measurements through the entire water column. A Rosette sampler with Go-Flo bottles was used, in addition to the CTD, and samples of the water column were collected at each of the 13 stations. These were filtered and analyzed in the laboratory. Trace metals analyzed for were CU, Ni, Cr, Pt, Ti, Al, Fe and V. Organic complexion of Cu and Ni were determined and speciation of Cr, Al and Ti measured. Nutrients (nitrite, silicate and ammonia) were measured spectrophotometrically.

University of Liverpool, Oceanographic Laboratories, Department of Earth Sciences
PO Box 147
Liverpool
Merseyside
L69 3BX
United Kingdom