Measurements of oceanic organosulfur compounds, halocarbons and ammonium made during the Challenger 55 research cruise as part of the North Sea Project (NSP) in the North Sea during June and July 1989

The cruise began on 24th June 1989 and ended on 7th July 1989 with a spatial coverage of +51N to +56N latitude and +2W to +8W longitude. The data consists of: -117 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; -116 measurements of the concentration of dimethylsulphoniopropionate (DMSP) per unit volume of the water column (particulate GF/C phase) by filtration and gas chromatography; -2 measurements of the concentration of dimethylsulphoniopropionate (DMSP) per unit volume of the water column (dissolved plus reactive particulate phase) by gas chromatography; and -120 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. -97 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; -96 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; -71 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; -100 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; -97 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; -105 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; -96 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; -105 measurements of the concentration of trichloroethane per unit volume of the water column (dissolved plus reactive particulate GF/C phase) by filtration, purging, cryogenic trapping and gas chromatography; and -107 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. -359 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.