Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record

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Abstract This study proposes an approach to estimate the ocean sea surface height signature of coherent internal tides from a 25-year along-track altimetry record, with a single inversion over time, resolving both internal tide contributions and mesoscale eddy variability. The inversion is performed on a reduced-order basis of topography and practically achieved with a conjugate gradient. The particularity of this approach is to mitigate the potential aliasing effects between mesoscales and internal tide estimation from the uneven altimetry sampling (observing the sum of these components) by accounting for their statistics simultaneously, while other methods generally use a prior mesoscale. The four major tidal components are considered (M2, K1, S2, O1) over the period 1992–2017 on a global configuration. From the solution, we use altimetry data after 2017 for independent validation in order to evaluate the performance of the simultaneous inversion and compare it with an existing model.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record ; volume:18 ; number:2 ; year:2022 ; pages:469-481 ; extent:13
Ocean science ; 18, Heft 2 (2022), 469-481 (gesamt 13)

Creator: Ubelmann, Clément
Carrere, Loren
Durand, Chloé
Dibarboure, Gérald
Faugère, Yannice
Ballarotta, Maxime
Briol, Frédéric
Lyard, Florent

DOI: 10.5194/os-18-469-2022

URN: urn:nbn:de:101:1-2022041405241256145199

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 7:19 AM CEST

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Associated

Ubelmann, Clément
Carrere, Loren
Durand, Chloé
Dibarboure, Gérald
Faugère, Yannice
Ballarotta, Maxime
Briol, Frédéric
Lyard, Florent

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