Bussmann, Ingeborg; Ragna, Bermann; Fischer, Philipp: Dissolved methane concentrations, diffusive methane flux and EOVs in the German Bight in February 2025 (Sternfahrt 13) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.992626 (dataset in review)
Abstract:
In continuation of the previous cruises (Sternfahrten) we covered a similar area with the RV Heincke. All instruments were set up in the MOSES laboratory container. Standard hydrographic parameters were determined with a pocket ferrybox running with ship's surface water supply. In addition, dissolved methane was determined continuously. We used a degassing unit which was using surface water from the ship's water supply. The gas mixture was subsequently analysed with a Greenhouse Gas Analyzer from LosGatos. Conversion to methane concentration was performed with water samples, from which the methane content was determined with gas chromatography. Atmospheric methane concentrations were obtained from the ICOS-station Helgoland. Wind speed was obtained from the ships meteorological systems. The diffusive flux was calculated as outlined in the additional meta data description.
Related to:
Nightingale, Philip D; Malin, Gill; Law, Cliff S; Watson, Andrew J; Liss, Peter S; Liddicoat, Malcolm; Boutin, Jacqueline; Upstill-Goddard, Robert C (2000): In situ evaluation of air-sea gas exchange parameterizations using novel conservative and volatile tracers. Global Biogeochemical Cycles, 14(1), 373-387, https://doi.org/10.1029/1999GB900091
Wanninkhof, Rik (2014): Relationship between wind speed and gas exchange over the ocean revisited. Limnology and Oceanography-Methods, 12(6), 351-362, https://doi.org/10.4319/lom.2014.12.351
Project(s):
Funding:
Federal Ministry of Research, Technology and Space (BMFTR), grant/award no. 03F0954B: DAM mareXtreme - ElbeXtreme, AWI
Coverage:
Median Latitude: 54.174864 * Median Longitude: 8.252310 * South-bound Latitude: 53.019774 * West-bound Longitude: 7.895191 * North-bound Latitude: 54.400916 * East-bound Longitude: 8.619209
Date/Time Start: 2025-02-10T08:32:00 * Date/Time End: 2025-02-12T16:42:00
Minimum DEPTH, water: 1 m * Maximum DEPTH, water: 1 m
Event(s):
HE653/2_0_Underway-5 * Latitude Start: 53.533140 * Longitude Start: 8.581020 * Latitude End: 53.532192 * Longitude End: 8.582298 * Date/Time Start: 2025-02-09T07:53:18 * Date/Time End: 2025-02-13T13:22:25 * Elevation Start: -3.0 m * Elevation End: -3.0 m * Campaign: HE653/2 (MOSES_2025_Elbe-NorthSea, Sternfahrt 13, Nothilfe Uthörn) * Basis: Heincke * Method/Device: Ship Weather Station (SWEAS)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
40180 data points
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