Uhlig, Christiane; Loose, Brice (2017): Methane oxidation in Arctic seawater, Utqiagvik, Alaska. PANGAEA, https://doi.org/10.1594/PANGAEA.874893, Supplement to: Uhlig, C; Loose, B (2017): Using stable isotopes and gas concentrations for independent constraints on microbial methane oxidation at Arctic Ocean temperatures. Limnology and Oceanography-Methods, 15(8), 737-751, https://doi.org/10.1002/lom3.10199
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Arctic seawater was collected at two sites close to Utqiagvik, North Slope, Alaska on 7, 9 and 15 April 2016 in the Beaufort Sea. Site "Elson Lagoon" (EL) was located North of Utqiagvik (2016-04-07, 71.334° N, -156.363° W), covered with 1.5 m thick sea ice and shallow with approximately 1.5 m depth. Water was collected from a depth of 1.5 m in a narrow layer of water between the sea ice and the sediment. Site "Ice Mass Balance Buoy" (IMB) was located 1 km offshore of Utqiagvik (2016-04-07, 71.373° N, -156.548° W), and (2016-04-09, 71.372° N, -156.540° W). This site was characterized by 1 m thick fast ice cover and a water depth of approximately 7 m. Water was collected at five depths from 1 to 6.5 m.
Seawater was additionally sampled in Narragansett Bay, Rhode Island, from the pier of the Graduate School of Oceanography, University of Rhode Island (41.492° N, -71.419° W) on 15 July 2016 to test our method for applicability under different environmental conditions. Sampling depth was 2-3 m at a water depth of approx. 6 m.
Seawater was amended with different methane concentrations to determine methane oxidation rates in a headspace approach. Methane concentration and isotope ratios were determined with a Picarro G2201-i cavity ring-down spectrometer (Picarro, Santa Clara, California, USA) coupled to a Small Sample Isotope Module (SSIM) (Picarro, Santa Clara, California, USA). Several treatments were amended with sodium hydroxide (NaOH) to serve as killed controls or with 2-bromoethanesulphonate (BES) an inhibitor for methane production.
Median Latitude: 65.388600 * Median Longitude: -139.482000 * South-bound Latitude: 41.492000 * West-bound Longitude: -156.548000 * North-bound Latitude: 71.373000 * East-bound Longitude: -71.419000
Date/Time Start: 2016-04-07T00:00:00 * Date/Time End: 2016-07-15T00:00:00
Minimum DEPTH, water: 1.0 m * Maximum DEPTH, water: 6.5 m
Elson_Lagoon * Latitude: 71.334000 * Longitude: -156.363000 * Date/Time: 2016-04-07T00:00:00 * Device: Multiple investigations (MULT)
Narragansett_Bay * Latitude: 41.492000 * Longitude: -71.419000 * Date/Time: 2016-07-15T00:00:00 * Elevation: -6.0 m * Device: Multiple investigations (MULT)
|#||Name||Short Name||Unit||Principal Investigator||Method||Comment|
|1||Event label||Event||Uhlig, Christiane|
|2||Date/Time of event||Date/Time||Uhlig, Christiane|
|3||Latitude of event||Latitude||Uhlig, Christiane|
|4||Longitude of event||Longitude||Uhlig, Christiane|
|5||DEPTH, water||Depth water||m||Uhlig, Christiane||Geocode|
|6||Depth, top/min||Depth top||m||Uhlig, Christiane|
|7||Depth, bottom/max||Depth bot||m||Uhlig, Christiane|
|8||Sample ID||Sample ID||Uhlig, Christiane|
|10||Sample amount||N||#||Uhlig, Christiane|
|11||Duration, number of days||Duration||days||Uhlig, Christiane|
|12||Duration, number of days, standard deviation||Duration std dev||±||Uhlig, Christiane|
|13||Methane||CH4||nmol/l||Uhlig, Christiane||Cavity ring-down spectrometer G2201-i, coupled to a small sample isotope module||mean|
|14||Methane, standard deviation||CH4 std dev||±||Uhlig, Christiane||Cavity ring-down spectrometer G2201-i, coupled to a small sample isotope module|
|15||Methane, natural logarithm||ln(CH4)||nmol||Uhlig, Christiane||Calculated||mean|
|16||Methane, natural logarithm, standard deviation||ln(CH4) std dev||±||Uhlig, Christiane||Calculated|
|17||δ13C, methane||δ13C CH4||‰ PDB||Uhlig, Christiane||Cavity ring-down spectrometer G2201-i, coupled to a small sample isotope module||mean, VPDB|
|18||δ13C, methane, standard deviation||δ13C CH4 std dev||±||Uhlig, Christiane||Cavity ring-down spectrometer G2201-i, coupled to a small sample isotope module|
|19||Y-axis high mean||Y-axis high mean||Uhlig, Christiane||Calculated, see reference(s)|
|20||Y-axis high, standard deviation||Y-axis high std dev||±||Uhlig, Christiane||Calculated, see reference(s)|
|21||Y-axis low mean||Y-axis low mean||Uhlig, Christiane||Calculated, see reference(s)|
|22||Y-axis low, standard deviation||Y-axis low std dev||±||Uhlig, Christiane||Calculated, see reference(s)|
4152 data points