Internal solitary waves refraction and diffraction from interaction with eddies off the Amazon Shelf from SWOT

Goret, Chloé; Koch-Larrouy, Ariane; Kouogang, Fabius; de Macedo, Carina Regina; M'Hamdi, Amine; Magalhães, Jorge M.; da Silva, José Carlos Bastos; Tchilibou, Michel; Artana, Camila; Dadou, Isabelle; Delepoulle, Antoine; Barbot, Simon; Ballarotta, Maxime; Carrère, Loren; Costa da Silva, Alex

doi:10.5194/os-22-679-2026

Articles | Volume 22, issue 1

https://doi.org/10.5194/os-22-679-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-22-679-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 1

Research article

|

17 Feb 2026

Research article |

| 17 Feb 2026

Internal solitary waves refraction and diffraction from interaction with eddies off the Amazon Shelf from SWOT

Chloé Goret, Ariane Koch-Larrouy, Fabius Kouogang, Carina Regina de Macedo, Amine M'Hamdi, Jorge M. Magalhães, José Carlos Bastos da Silva, Michel Tchilibou, Camila Artana, Isabelle Dadou, Antoine Delepoulle, Simon Barbot, Maxime Ballarotta, Loren Carrère, and Alex Costa da Silva

Data sets

SWOT Level-3 KaRIn Low Rate SSH Expert (v2.0.1) AVISO/DUACS https://doi.org/10.24400/527896/A01-2023.018

ALTO/DUACS Mutlimission Experimental Level-4 maps, computed with SWOT Level-3 products (using both KaRIn and nadir instruments) (v1.0) AVISO/DUACS https://doi.org/10.24400/527896/A01-2024.007

NASA MODIS Adaptive Processing System, NASA Goddard Space Flight Center: MODIS 1km Calibrated Radiances Product MODIS Characterization Support Team https://doi.org/10.5067/MODIS/MYD021KM.061

NASA Goddard Space Flight Center: VIIRS/JPSS1 Moderate Resolution Bands L1B 6-Min Swath 750m VIIRS Calibration Support Team https://doi.org/10.5067/VIIRS/VJ102MOD.021

Model code and software

AntSimi/pyeddy-tracker: META3.1 Article (v3.3.1) A. Delepoulle et al. https://doi.org/10.5281/zenodo.6333989

Short summary

Using high-resolution satellite measurements, we observed how eddies off the Amazon shelf modify internal solitary waves. The results show that these waves can be deflected from their path, even split into two branches, and change their geometry when interacting with different types of eddies. This work provides new insight into the ocean’s complex dynamic interactions and could help guide future predictions of ocean behavior and its effects on coastal and marine ecosystems.