The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the northwest European shelf sea ...

• Main Authors: Clark, Darren, Brown, Ian, Rees, Andrew, Somerfield, Paul J, Miller, P I
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Coast and continental shelf; Entire community; Laboratory experiment; North Atlantic; Open ocean; Other metabolic rates; Pelagos; Temperate; Event label; Identification; Treatment; Temperature, water; Salinity; Time in hours; Carbon, inorganic, dissolved; Alkalinity, total; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Calcite saturation state; Aragonite saturation state; Nitrate; Flag; Silicate; Phosphate; Ammonium; Ammonium, standard deviation; Ammonium regeneration rate; Ammonium regeneration rate, standard deviation; Ammonia, oxidation rate; Ammonia, oxidation rate, standard deviation; Nitrous oxide, dissolved; Bacteria; Nanoflagellates, heterotrophic; Dimethyl sulfide; Dimethylsulfoniopropionate; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Experiment; Coulometric titration; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; United Kingdom Ocean Acidification research programme UKOA; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.837515; https://doi.pangaea.de/10.1594/PANGAEA.837515

The assimilation and regeneration of dissolved inorganic nitrogen, and the concentration of N2O, was investigated at stations located in the NW European shelf sea during June/July 2011. These observational measurements within the photic zone demonstrated the simultaneous regeneration and assimilation of NH4+, NO2- and NO3-. NH4+ was assimilated at 1.82-49.12 nmol N/L/h and regenerated at 3.46-14.60 nmol N/L/h; NO2- was assimilated at 0-2.08 nmol N/L/h and regenerated at 0.01-1.85 nmol N/L/h; NO3-was assimilated at 0.67-18.75 nmol N/L/h and regenerated at 0.05-28.97 nmol N/L/h. Observations implied that these processes were closely coupled at the regional scale and that nitrogen recycling played an important role in sustaining phytoplankton growth during the summer. The [N2O], measured in water column profiles, was 10.13 ± 1.11 nmol/L and did not strongly diverge from atmospheric equilibrium indicating that sampled marine regions were neither a strong source nor sink of N2O to the atmosphere. Multivariate ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2014-10-28. ...