Regional modeling of internal-tide dynamics around New Caledonia –  Part 2: Tidal incoherence and implications for sea surface height observability

Bendinger, Arne; Cravatte, Sophie; Gourdeau, Lionel; Vic, Clément; Lyard, Florent

doi:https://doi.org/10.5194/os-21-1943-2025

Articles | Volume 21, issue 5

https://doi.org/10.5194/os-21-1943-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-21-1943-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 5

Research article

|

12 Sep 2025

Research article |

| 12 Sep 2025

Regional modeling of internal-tide dynamics around New Caledonia – Part 2: Tidal incoherence and implications for sea surface height observability

Arne Bendinger, Sophie Cravatte, Lionel Gourdeau, Clément Vic, and Florent Lyard

Data sets

Regional modeling of internal-tide dynamics around New Caledonia. Part 2: Tidal incoherence and implications for sea surface height observability Bendinger https://doi.org/10.5281/zenodo.17079808

Model code and software

Regional modeling of internal-tide dynamics around New Caledonia. Part 2: Tidal incoherence and implications for sea surface height observability Bendinger https://doi.org/10.5281/zenodo.15592721

Short summary

Temporal variability of the semidiurnal internal tide around New Caledonia is investigated using regional modeling. An important contribution to temporal variability not linked to the spring–neap tide cycle is due to the presence of mesoscale eddies both at the generation sites and in the propagation direction. The incoherent tide has a widespread signature in sea surface height (SSH), challenging the SSH observability of mesoscale to submesoscale dynamics.