Methane and nitrous oxide dissolved gas concentrations in seawater from the North American Arctic Ocean (2015–2018) ...

• Main Authors: Manning, Cara C M, Zheng, Zhiyin, Fenwick, Lindsay, McCulloch, Ross D, Damm, Ellen, Izett, Robert W, Williams, William J, Zimmermann, Sarah, Vagle, Svein, Tortell, Philippe Daniel
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Arctic; Methane; nitrous oxide; ocean; rivers; Event label; Station label; DATE/TIME; LATITUDE; LONGITUDE; DEPTH, water; Pressure, water; Salinity; Temperature, water; Nitrous oxide, dissolved; Nitrous oxide, standard deviation; Nitrous oxide, dissolved, equilibrium; Methane, dissolved; Methane, standard deviation; Methane, dissolved, equilibrium; Oxygen; Cast number; Bottle number; Sample ID; Mixed layer depth; δ13C, methane, dissolved; δ13C, methane, standard deviation; CTD/Rosette; CTD, Sea-Bird; Gas chromatography - Mass spectrometry GC-MS; Calculated; Thermo Trace GC coupled to ThermoFinnigan DELTAplus XP GC-C-IRMS; AMD15_2; AMD16_3a; AMD16_3b; AMD17_2; AMD18_3; LSL1509; LSL1609; LSL1709; LSL1809; SWL1507; SWL1607; SWL1707; SWL1807; CCGS Amundsen; Louis S. St-Laurent; Canadian Coast Guard Sir W. Laurier; Global marine biogeochemical cycles of trace elements and their isotopes GEOTRACES; International Polar Year 2007-2008 IPY; Arctic Ocean; arctic methane; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.941194; https://doi.pangaea.de/10.1594/PANGAEA.941194

This dataset contains methane and nitrous oxide dissolved gas concentration, dissolved methane carbon isotope, and ancillary hydrographic data from research cruises in the North American Arctic Ocean between 2015-2018. Ocean samples for methane and nitrous oxide analysis were collected from Niskin bottles mounted on a CTD rosette. Water was collected into glass serum bottles and allowed to overflow three times before preserving with mercuric chloride and sealing with with butyl rubber stoppers and aluminum crimp seals. Gas concentrations were determined using a purge and trap system coupled to a gas chromatograph/mass spectrometer, following the method of Capelle et al. (2015). Equilibrium dry atmospheric concentrations were 328.25, 329.14, 330.11, and 330.96 ppb for N2O and 1919.64, 1933.67, 1934.92, and 1933.50 ppb for CH4 in 2015, 2016, 2017, and 2018, respectively. Equilibrium dissolved concentrations were calculated from the measured temperature and salinity following Wiesenburg and Guinasso (1979) for ...