Dissolved nitrous oxide and methane in water column and pore water surface sediment (box corer) for UK Shelf Sea Biogeochemistry cruise DY018.

This dataset contains 208 measurements (from 144 water bottle and 1 surface sediment pore water sample) of seawater dissolved nitrous oxide (N2O) and methane (CH4) from the Celtic Sea (50N, 8W). The samples were collected during RRS Discovery cruise DY018 in Nov-Dec 2014, as part of the UK Shelf Sea Biogeochemistry research programme (UK-SSB), in order to assess variability in the source-sink strength and exchange of both gases in the Celtic sea. Measurements were carried out using Flame Ionisation detection-gas chromatography (FID-GC) for methane and Electron capture detection-gas chromatography (ECD-GC) for nitrous oxide. The data were collected as part of the SSB research programme in the CaNDyFloSS: Carbon and Nutrient Dynamics and Fluxes over Shelf Systems (NE/K00185X/1) research programme component. SSB was co-funded by the Natural Environment Research Council (NERC) and the Department for Environment, Food and Rural Affairs (Defra). The programme took a holistic approach to the cycling of nutrients and carbon and the controls on primary and secondary production in UK and European shelf seas, to increase understanding of these processes and their role in wider biogeochemical cycles. The British Oceanographic Data Centre (BODC) created the metadata entry and is responsible for holding master copies of the data.