Measurements of oceanic organosulfur compounds, halocarbons and ammonium made during the Challenger 57 research cruise as part of the North Sea Project (NSP) in the North Sea during July and August 1989

The cruise began on 24th July 1989 and ended on 5th August 1989 with a spatial coverage of +51N to +56N latitude and +2W to +8E longitude. The data consists of: -41 measurements of the concentration of dimethylsulphoniopropionate (DMSP) per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration and gas chromatography; -44 measurements of the concentration of dimethylsulphoniopropionate (DMSP) per unit volume of the water column (particulate GF/C phase) by filtration and gas chromatography; -3 measurements of the concentration of dimethylsulphide + dimethylsulphoniopropionate (DMS+DMSP) per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration and gas chromatography; and -44 measurements of the concentration of dimethylsulphide (DMS) per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography. -63 measurements of the concentration of dibromochloromethane per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; -64 measurements of the concentration of dibromomethane per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; -62 measurements of the concentration of dichlorobromomethane per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; -65 measurements of the concentration of iodomethane (methyl iodide) per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; -62 measurements of the concentration of tetrachloroethene per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; -64 measurements of the concentration of tetrachloromethane (carbon tetrachloride) per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; -62 measurements of the concentration of tribromomethane per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; and -65 measurements of the concentration of trichloromethane (chloroform) per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography. -330 measurements of the concentration of ammonium (NH4) per unit volume of the water column (dissolved plus reactive particulate phase) by colorimetric autoanalysis.

See below for further details.