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dc.contributor.authorVeloso, M.
dc.contributor.authorGreinert, Jens
dc.contributor.authorMienert, Jurgen
dc.contributor.authorDe Batist, M.
dc.date.accessioned2022-05-02T09:56:00Z
dc.date.available2022-05-02T09:56:00Z
dc.date.issued2015-05-08
dc.description.abstractQuantifying marine methane fluxes of free gas (bubbles) from the seafloor into the water column is of importance for climate related studies, for example, in the Arctic, reliable methodologies are also of interest for studying man-made gas and oil leakage systems at hydrocarbon production sites. Hydroacoustic surveys with singlebeam and nowadays also multibeam systems have been proven to be a successful approach to detect bubble release from the seabed. A number of publications used singlebeam echosounder data to indirectly quantify free gas fluxes via empirical correlations between gas fluxes observed at the seafloor and the hydroacoustic response. Others utilize the hydroacoustic information in an inverse modeling approach to derive bubble fluxes. Here, we present an advanced methodology using data from splitbeam echosounder systems for analyzing gas release water depth (> 100m). We introduce a new MATLAB-based software for processing and interactively editing data and we present how bubble-size distribution, bubble rising speed and the model used for calculating the backscatter response of single bubbles influence the final gas flow rate calculations. As a result, we highlight the need for further investigations on how large, wobbly bubbles, bubble clouds, and multi-scattering influence target strength. The results emphasize that detailed studies of bubble-size distributions and rising speeds need to be performed in parallel to hydroacoustic surveys to achieve realistic mediated methane flow rate and flux quantifications.en_US
dc.identifier.citationVeloso M, Greinert J, Mienert J, De Batist. A new methodology for quantifying bubble flow rates in deep water using splitbeam echosounders: Examples from the Arctic offshore NW-Svalbard. Limnology and Oceanography : Methods. 2015;13(6):267-287en_US
dc.identifier.cristinIDFRIDAID 1241743
dc.identifier.doi10.1002/lom3.10024
dc.identifier.issn1541-5856
dc.identifier.urihttps://hdl.handle.net/10037/24967
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalLimnology and Oceanography : Methods
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2015 The Author(s)en_US
dc.titleA new methodology for quantifying bubble flow rates in deep water using splitbeam echosounders: Examples from the Arctic offshore NW-Svalbarden_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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