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dc.contributor.authorMarcon, Yann
dc.contributor.authorRömer, Miriam
dc.contributor.authorScherwath, Martin
dc.contributor.authorRiedel, Michael
dc.contributor.authorDølven, Knut Ola
dc.contributor.authorHeesemann, Martin
dc.date.accessioned2022-03-23T12:00:59Z
dc.date.available2022-03-23T12:00:59Z
dc.date.issued2022-03-17
dc.description.abstractSeabed methane gas emissions occur worldwide at cold seeps located along most continental margins. Fluxes of methane gas released from the seabed in the form of bubbles can be extremely variable even over short time intervals. Some factors controlling the variability are still poorly understood. Here, we report on the results of continuous long-term sonar monitoring of bubble emissions at a depth of 1,260 m on the Clayoquot Slope, northern Cascadia margin. With a total monitoring duration of 4 years and a sampling period of 1 h, this is by far the longest high temporal resolution monitoring of seabed methane gas release ever conducted. Our results provide evidence that the diurnal and semi-diurnal tides influence the timing of the onset and cessation of bubble emissions. However, gas emissions within the monitoring area are active more than 84% of the time, indicating that tides alone are not sufficient to make venting pause. We hypothesize that the gas fluxes are transient but generally sufficiently high to maintain ebullition independently of the tidally-induced bottom pressure variations. Results also show that the tides do not seem to modulate the vigor of active gas emissionsen_US
dc.identifier.citationMarcon Y, Römer M, Scherwath M, Riedel M, Dølven KO, Heesemann M. Variability of Marine Methane Bubble Emissions on the Clayoquot Slope, Offshore Vancouver Island, Between 2017 and 2021. Frontiers in Earth Science. 2022;10en_US
dc.identifier.cristinIDFRIDAID 2011590
dc.identifier.doi10.3389/feart.2022.864809
dc.identifier.issn2296-6463
dc.identifier.urihttps://hdl.handle.net/10037/24511
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Earth Science
dc.relation.projectIDNorges forskningsråd: 223259en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleVariability of Marine Methane Bubble Emissions on the Clayoquot Slope, Offshore Vancouver Island, Between 2017 and 2021en_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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