Articles | Volume 22, issue 3
https://doi.org/10.5194/os-22-1515-2026
https://doi.org/10.5194/os-22-1515-2026
Research article
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13 May 2026
Research article | Highlight paper |  | 13 May 2026

High-latitude eddy statistics from SWOT compared with in situ observations

Charly de Marez, Arne Bendinger, and Ahmad Fehmi Dilmahamod

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Cited articles

Amores, A., Jordà, G., Arsouze, T., and Le Sommer, J.: Up to what extent can we characterize ocean eddies using present-day gridded altimetric products?, J. Geophys. Res.-Oceans, 123, 7220–7236, https://doi.org/10.1029/2018JC014140, 2018. a, b, c
Arai, M. and Yamagata, T.: Asymmetric evolution of eddies in rotating shallow water, Chaos, 4, 163–175, https://doi.org/10.1063/1.166001, 1994. a
Archer, M., Wang, J., Klein, P., Dibarboure, G., and Fu, L.-L.: Wide-swath satellite altimetry unveils global submesoscale ocean dynamics, Nature, 640, 691–696, https://doi.org/10.1038/s41586-025-08722-8, 2025. a
AVISO/DUACS: SWOT Level-3 SSH Basic (v3.0) [Data set], AVISO/DUACS [data set], https://doi.org/10.24400/527896/A01-2023.017, 2023a. a
AVISO/DUACS: SWOT Level-3 SSH Unsmoothed (v2.0.1) [Data set], AVISO/DUACS [data set], https://doi.org/10.24400/527896/A01-2024.003, 2023b.  a
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Editorial statement
The Surface Water and Ocean Topography (SWOT) wideswath altimeter is providing unprecedented observations of the ocean surface, enabling characterisation of mesoscale eddies at high latitudes with a resolution fine enough to capture the relevant spatial scales. Eddies are smaller in high latitudes due to the change in the Coriolis parameter. The eddies in these latitudes are, however, important influencing deep-water formation, carbon uptake, and sea-ice melt. The paper shows that the new SWOT satellite enables robust, quantitative eddy detection in polar and subpolar oceans, opening the door to global eddy climatologies in areas previously inaccessible.
Short summary
 

We use new observations from the Surface Water and Ocean Topography Mission (SWOT) satellite to reveal the structure of ocean eddies in the Labrador Sea at unprecedented resolution. By comparison with ship-based measurements, we show that SWOT reliably detects these features even at high latitudes, where conventional altimetry is limited. Our results provide the first detailed view of mesoscale eddies in the Labrador Sea and highlight SWOT's potential in polar regions.

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