Articles | Volume 22, issue 5
https://doi.org/10.5194/os-22-3479-2026
https://doi.org/10.5194/os-22-3479-2026
Research article
 | 
28 Oct 2026
Research article |  | 28 Oct 2026

A dynamical downscaling approach for the improved representation of sub-annual coastal sea level variability: the importance of shelf and slope ocean dynamics

Jacob Steinberg, John Krasting, and Andrew Ross

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Cited articles

Adcroft, A., Anderson, W., Balaji, V., Blanton, C., Bushuk, M., Dufour, C., Dunne, J., Griffies, S., Hallberg, R., Harrison, M., Held, I., Jansen, M., John, J., Krasting, J., Langenhorst, A., Legg, S., Liang, Z., McHugh, C., Radhakrishnan, A., Reichl, B., Rosati, A., Samuels, B., Shao, A., Stouffer, R., Winton, M., Wittenberg, A., Xiang, B., Zadeh, N., and Zhang, R.: The GFDL Global Ocean and Sea Ice Model OM4.0: Model Description and Simulation Features, J. Adv. Model. Earth Sy., 11, https://doi.org/10.1029/2019MS001726, 2019. a
Alexander, M., Scott, J., Jacox, M., Amaya, D., and Wilczynski, L.: Processes That Influence Bottom Temperatures in the California Current System, J. Geophys. Res.-Oceans, 130, https://doi.org/10.1029/2024JC021886, 2025. a
Apecechea, M., Melet, A., Reffray, G., and Thieblemont, R.: Impact of dynamical downscaling on sea level projections in the north-east Atlantic ocean and regional seas, J. Geophys. Res.-Oceans, 130, https://doi.org/10.1029/2025JC022737, 2025. a
Calafat, F., Wahl, T., Lindsten, F., Williams, J., and Frajka-Williams, E.: Coherent modulation of the sea-level annual cycle in the United States by Atlantic Rossby waves, Nat. Commun., 9, https://doi.org/10.1038/s41467-018-04898-y, 2018. a
Camargo, C., Piecuch, C., and Raubenheimer, B.: Do Ocean Dynamics Contribute to Coastal Floods? A Case Study of the Shelfbreak Jet and Coastal Sea Level Along Southern New England (US), Earths Future, 13, https://doi.org/10.1029/2025EF006708, 2025. a, b
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To improve forecasts, we build and analyze an ensemble of year-long hindcasts of sea level in the northwest Atlantic Ocean. With a focus at US East Coast tide gauge stations, we reveal regional differences in simulated variability resulting from different parent and downscaled ocean model horizontal resolution. We consider differences among parent model, downscaled model, and observed variability as a function of frequency and find downscaled enhancements increase with decreasing latitude.
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