Articles | Volume 18, issue 1
https://doi.org/10.5194/os-18-233-2022
https://doi.org/10.5194/os-18-233-2022
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18 Feb 2022
Research article | Highlight paper |  | 18 Feb 2022

Autonomous methane seep site monitoring offshore western Svalbard: hourly to seasonal variability and associated oceanographic parameters

Knut Ola Dølven, Bénédicte Ferré, Anna Silyakova, Pär Jansson, Peter Linke, and Manuel Moser

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Cited articles

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Braga, R., Iglesias, R., Romio, C., Praeg, D., Miller, D., Viana, A., and Ketzer, J.: Modelling methane hydrate stability changes and gas release due to seasonal oscillations in bottom water temperatures on the Rio Grande cone, offshore southern Brazil, Mar. Petrol. Geol., 112, 104071, https://doi.org/10.1016/j.marpetgeo.2019.104071, 2020. a
Canning, A., Fietzek, P., Rehder, G., and Körtzinger, A.: Technical note: Seamless gas measurements across the land–ocean aquatic continuum – corrections and evaluation of sensor data for CO2, CH4 and O2 from field deployments in contrasting environments, Biogeosciences, 18, 1351–1373, https://doi.org/10.5194/bg-18-1351-2021, 2021. a
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Short summary
Natural sources of atmospheric methane need to be better described and quantified. We present time series from ocean observatories monitoring two seabed methane seep sites in the Arctic. Methane concentration varied considerably on short timescales and seasonal scales. Seeps persisted throughout the year, with increased potential for atmospheric release in winter due to water mixing. The results highlight and constrain uncertainties in current methane estimates from seabed methane seepage.