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Sea Level at the Coast from Video-Sensed Waves: Comparison to Tidal Gauges and Satellite Altimetry

dc.rights.licenseopenen_US
dc.contributor.authorONDOA, G
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorALMAR, Rafaël
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCASTELLE, Bruno
IDREF: 087596520
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorTESTUT, L.
hal.structure.identifierOcéan du Large et Variabilité Climatique [OLVAC]
dc.contributor.authorLEGER, F.
dc.contributor.authorSOHOU, Z
dc.contributor.authorBONOU, F
dc.contributor.authorBERGSMA, E
dc.contributor.authorMEYSSIGNAC, B
dc.contributor.authorLARSON, M
dc.date.accessioned2024-03-04T13:25:55Z
dc.date.available2024-03-04T13:25:55Z
dc.date.issued2019-08-01
dc.identifier.issn0739-0572en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188560
dc.description.abstractEnNearshore complex and energetic hydrodynamic conditions make observing evolving processes during extreme and short-term events difficult. In particular, total sea levels at the coast are hard to measure with current techniques. Sea level is commonly measured with tidal gauges and spaceborne altimetry, which lack essential details of spatial and wave-related sea level variability along the coast. Hence, novel techniques, adapted to nearshore areas, are required. This paper presents the first-time use of video cameras to derive the total sea level at the coast. This novel approach consists of estimating time-varying total water levels by applying a celerity-based depth inversion method, which is conventionally used to estimate bathymetry from video. The video-derived total sea levels are compared to sea levels derived from an in situ acoustic Doppler current profiler (ADCP), the nearest tide gauge, and altimetry. A tidal harmonic analysis is performed on the video-derived water levels, yielding an accurate determination of the dominant tidal harmonics. However, it remains difficult to separate bathymetric changes due to the waves on beaches when rapid morphological changes occur under energetic conditions. Nonetheless, video-derived water-level anomalies are in good agreement with state-of-the-art altimetry products. Although there is still work to be done, the results show the potential to measure total sea level at the coast using video camera systems.
dc.language.isoENen_US
dc.title.enSea Level at the Coast from Video-Sensed Waves: Comparison to Tidal Gauges and Satellite Altimetry
dc.typeArticle de revueen_US
dc.identifier.doi10.1175/JTECH-D-18-0203.1en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Océanographieen_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalJournal of Atmospheric and Oceanic Technologyen_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamMETHYSen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02385633
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
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