Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record
<p>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...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2022-04-01
|
| Series: | Ocean Science |
| Online Access: | https://os.copernicus.org/articles/18/469/2022/os-18-469-2022.pdf |
| _version_ | 1811314161613799424 |
|---|---|
| author | C. Ubelmann C. Ubelmann L. Carrere C. Durand G. Dibarboure Y. Faugère M. Ballarotta F. Briol F. Lyard |
| author_facet | C. Ubelmann C. Ubelmann L. Carrere C. Durand G. Dibarboure Y. Faugère M. Ballarotta F. Briol F. Lyard |
| author_sort | C. Ubelmann |
| collection | DOAJ |
| description | <p>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.</p> |
| first_indexed | 2024-04-13T11:06:58Z |
| format | Article |
| id | doaj.art-c84005e1097448e68c5ab76ec72c0d73 |
| institution | Directory Open Access Journal |
| issn | 1812-0784 1812-0792 |
| language | English |
| last_indexed | 2024-04-13T11:06:58Z |
| publishDate | 2022-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Ocean Science |
| spelling | doaj.art-c84005e1097448e68c5ab76ec72c0d732022-12-22T02:49:15ZengCopernicus PublicationsOcean Science1812-07841812-07922022-04-011846948110.5194/os-18-469-2022Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry recordC. Ubelmann0C. Ubelmann1L. Carrere2C. Durand3G. Dibarboure4Y. Faugère5M. Ballarotta6F. Briol7F. Lyard8Ocean-Next, 90 chemin du Moulin, 38660 La Terrasse, FranceDatlas, CS 40700 38058, Grenoble, CEDEX 9, FranceCollecte Localisation Satellite, 11 rue Hermès, Parc Technologique du Canal 31520 Ramonville Saint-Agne, FranceCollecte Localisation Satellite, 11 rue Hermès, Parc Technologique du Canal 31520 Ramonville Saint-Agne, FranceCentre National d'Etudes Spatiales, 18 avenue Edouard Belin, 31401 Toulouse, FranceCollecte Localisation Satellite, 11 rue Hermès, Parc Technologique du Canal 31520 Ramonville Saint-Agne, FranceCollecte Localisation Satellite, 11 rue Hermès, Parc Technologique du Canal 31520 Ramonville Saint-Agne, FranceCollecte Localisation Satellite, 11 rue Hermès, Parc Technologique du Canal 31520 Ramonville Saint-Agne, FranceLEGOS, 14 avenue Edouard Belin, 31400 Toulouse, France<p>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.</p>https://os.copernicus.org/articles/18/469/2022/os-18-469-2022.pdf |
| spellingShingle | C. Ubelmann C. Ubelmann L. Carrere C. Durand G. Dibarboure Y. Faugère M. Ballarotta F. Briol F. Lyard Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record Ocean Science |
| title | Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record |
| title_full | Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record |
| title_fullStr | Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record |
| title_full_unstemmed | Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record |
| title_short | Simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record |
| title_sort | simultaneous estimation of ocean mesoscale and coherent internal tide sea surface height signatures from the global altimetry record |
| url | https://os.copernicus.org/articles/18/469/2022/os-18-469-2022.pdf |
| work_keys_str_mv | AT cubelmann simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT cubelmann simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT lcarrere simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT cdurand simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT gdibarboure simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT yfaugere simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT mballarotta simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT fbriol simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord AT flyard simultaneousestimationofoceanmesoscaleandcoherentinternaltideseasurfaceheightsignaturesfromtheglobalaltimetryrecord |