Verdugo, Josefa; Farías, Laura (2026): Dissolved methane concentrations in seawater during Lomrog III cruise, Arctic Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.993688
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Published: 2026-04-22 • DOI registered: 2026-05-21
Abstract:
The concentration of methane (CH4), along with temperature and salinity, were measured in the ice- covered Arctic Ocean within the Eurasian Basin (Verdugo et al., 2016; doi:10.1016/j.dsr.2016.08.016). The transect was conducted across the Nansen-Gakkel Ridge, from the Nansen Basin to the Amundsen Basin, covering depths from the surface (10 m) down to 4300 m. All sampling stations, except for ST 12, were covered by sea ice. Water samples were collected with a CTD-rosette sampler equipped with 24 Niskin Bottles. Gas sampling was carried out directly from 12 L Niskin bottles. Triplicate water samples for CH4 analyses were taken in 20 mL glass vials and preserved with 50 µL of saturated HgCl2. The vials were then sealed with a butyl-rubber septum and an aluminum cap to prevent bubble formation and stored in darkness at room temperature until laboratory analysis. CH4 concentrations were analyzed by creating 5 mL of ultra-pure helium headspace, followed by equilibration in the vial, and then quantified with a gas chromatograph (GC). A Varian 3380 GC, equipped with flame ionization detector (FID) maintained at 250 °C, and a capillary column GS-Q operated at 30 °C was used for analysis. A calibration curve was made with three standard concentrations for CH4 (1, 5, and 10 ppm, provided by Scotty Standards) and dry air.
Related to:
Farías, Laura; Verdugo, Josefa (2025): Nitrous oxide in seawater during Lomrog III cruise, Arctic Ocean (2012) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.977808
Marcussen, Christian (2012): Lomonosov Ridge off Greenland 2012 (LOMROG III) - Cruise Report. Geological Survey of Denmark and Greenland, Danish Ministry of Climate and Energy, 222 pp, hdl:10013/epic.45351.d001
Stratmann, Tanja; Lund-Hansen, Lars Chresten; Sorrell, Brian K; Markager, Stiig (2018): Concentrations of organic and inorganic nutrients and chlorophyll-a during cruise LOMROG III in the central Arctic Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.896134
References:
Stratmann, Tanja; Lund-Hansen, Lars Chresten; Sorrell, Brian K; Markager, Stiig (2017): Concentrations of organic and inorganic bound nutrients and chlorophyll a in the Eurasian Basin, Arctic Ocean, early autumn 2012. Regional Studies in Marine Science, 9, 69-75, https://doi.org/10.1016/j.rsma.2016.11.008
Verdugo, Josefa; Damm, Ellen; Snoeijs, P; Díez, Beatriz; Farías, Laura (2016): Climate relevant trace gases (N2O and CH4) in the Eurasian Basin (Arctic Ocean). Deep Sea Research Part I: Oceanographic Research Papers, 117, 84-94, https://doi.org/10.1016/j.dsr.2016.08.016
Funding:
Swedish Research Council for Environment Agricultural Sciences and Spatial Planning (FORMAS), grant/award no. 2012-1459
Coverage:
Median Latitude: 85.883944 * Median Longitude: 2.490472 * South-bound Latitude: 82.195833 * West-bound Longitude: -69.411500 * North-bound Latitude: 89.265000 * East-bound Longitude: 78.242667
Date/Time Start: 2012-08-02T11:35:00 * Date/Time End: 2012-09-11T09:30:00
Minimum DEPTH, water: 9.628 m * Maximum DEPTH, water: 4350.000 m
Event(s):
LR12s01 * Latitude: 82.958000 * Longitude: 14.933000 * Date/Time: 2012-08-02T11:35:00 * Location: Arctic Ocean * Campaign: LOMROG-III * Basis: Oden * Method/Device: CTD/Rosette (CTD-RO) * Comment: Ship
LR12s02 * Latitude: 86.743167 * Longitude: 1.955167 * Date/Time: 2012-08-05T17:03:00 * Location: Arctic Ocean * Campaign: LOMROG-III * Basis: Oden * Method/Device: CTD/Rosette (CTD-RO) * Comment: Ship
LR12s03 * Latitude: 87.770000 * Longitude: -37.757500 * Date/Time: 2012-08-09T13:09:00 * Location: Arctic Ocean * Campaign: LOMROG-III * Basis: Oden * Method/Device: CTD/Rosette (CTD-RO) * Comment: Ship
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Verdugo, Josefa | |||
| 2 | Latitude of event | Latitude | Verdugo, Josefa | |||
| 3 | Longitude of event | Longitude | Verdugo, Josefa | |||
| 4 | DATE/TIME | Date/Time | Verdugo, Josefa | Geocode | ||
| 5 | DEPTH, water | Depth water | m | Verdugo, Josefa | CTD/Rosette (CTD-RO) | Geocode |
| 6 | Methane | CH4 | nmol/l | Verdugo, Josefa | Gas chromatograph, Varian Inc., 3380 | |
| 7 | Salinity | Sal | Verdugo, Josefa | CTD/Rosette (CTD-RO) | ||
| 8 | Temperature, water | Temp | °C | Verdugo, Josefa | CTD/Rosette (CTD-RO) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
385 data points