Citation:

lom3.10199

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Abstract:

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.

Related to:

Uhlig, Christiane; Kirkpatrick, John B; d'Hondt, Steven L; Loose, Brice (2018): Methane-oxidizing seawater microbial communities from an Arctic shelf. Biogeosciences, 15, 3311-3329, https://doi.org/10.5194/bg-15-3311-2018

Coverage:

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

Event(s):

Elson_Lagoon * Latitude: 71.334000 * Longitude: -156.363000 * Date/Time: 2016-04-07T00:00:00 * Method/Device: Multiple investigations (MULT)

Narragansett_Bay * Latitude: 41.492000 * Longitude: -71.419000 * Date/Time: 2016-07-15T00:00:00 * Elevation: -6.0 m * Method/Device: Multiple investigations (MULT)

Utqiagvik_IMB_stored * Latitude: 71.372000 * Longitude: -156.540000 * Date/Time: 2016-04-15T00:00:00 * Elevation: -7.0 m * Method/Device: Multiple investigations (MULT)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	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
9	Treatment	Treat		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)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

4152 data points

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