Measurements of oceanic methane, nitrous oxide, halocarbons and carbon dioxide; and atmospheric and oceanic ammonium made during the Discovery 212 research cruise in the Arabian Sea, November-December 1994

This metadata entry refers to measurements of oceanic methane and oceanic nitrous oxide made by Nick Owens; oceanic halocarbons made by Andrew Watson and Alison Bateman; oceanic and atmospheric ammonium made by Stuart Gibbs; and oceanic carbon dioxide made by Susan Knox during the Discovery 212 research cruise in the Arabian Sea as part of the ARABESQUE project, organized to study the upper ocean microbial biogeochemistry in the Arabian Sea, as a part of the Joint Global Ocean Flux Study (JGOFS). The cruise began on 16th November 1994 and ended on 19th December 1994 with a spatial coverage of +8N and +24 latitude and +58E and +67E longitude.

The data set consists of:
-348 measurements of the concentration of methane (CH4) per unit volume of the water column (dissolved plus reactive particulate phase) by gas chromatography;
-348 measurements of the saturation of methane (CH4) in the water column (dissolved phase), computed from concentration;
-348 measurements of the concentration of nitrous oxide (N2O) per unit volume of the water column (dissolved plus reactive particulate phase) by gas chromatography;
-348 measurements of the saturation of nitrous oxide (N2O) in the water column (dissolved phase), computed from concentration;
-432 measurements of the partial pressure of carbon dioxide (pCO2) in the water column by shower-head equilibration with air gas chromatography and Takahashi correction to in-situ temperature;
-429 measurements of the partial pressure of carbon dioxide (pCO2) in the water column by shower-head equilibration with air and gas chromatography and Turner correction to in-situ temperature; and
-434 measurements of the concentration of carbon (total inorganic) (TCO2) per unit volume of the water column (dissolved plus reactive particulate phase) by coulometry.
-measurements of oceanic halocarbons
-measurements of oceanic ammonium (NH4)
-measurements of atmospheric ammonium (NH4)

See below for further details.