Articles | Volume 26, issue 9
https://doi.org/10.5194/nhess-26-4231-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-4231-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Developing a coastal hazard prediction system in ice-infested waters – Part 1: High-resolution regional wave modeling in the Estuary and Gulf of St. Lawrence
Institut des sciences de la mer, Université du Québec à Rimouski, Québec G5L 3A1, Canada
Laboratoire d'études des littoraux nordiques et arctiques, Université du Québec à Rimouski, Québec G5L 3A1, Canada
Dany Dumont
Institut des sciences de la mer, Université du Québec à Rimouski, Québec G5L 3A1, Canada
David Didier
Laboratoire d'études des littoraux nordiques et arctiques, Université du Québec à Rimouski, Québec G5L 3A1, Canada
Pascal Bernatchez
Laboratoire de dynamique et de gestion intégrée des zones côtières, Université du Québec à Rimouski, Québec G5L 3A1, Canada
Sébastien Dugas
Laboratoire de dynamique et de gestion intégrée des zones côtières, Université du Québec à Rimouski, Québec G5L 3A1, Canada
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Hooshmand Zandi, Ludovic Métivier, Romain Brossier, Sebastien Kuchly, Vasco Zanchi, Nicolas Mokus, Véronique Dansereau, Antonin Eddi, Stéphane Perrard, Dany Dumont, and Ludovic Moreau
EGUsphere, https://doi.org/10.5194/egusphere-2026-2519, https://doi.org/10.5194/egusphere-2026-2519, 2026
This preprint is open for discussion and under review for The Cryosphere (TC).
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Sea ice is declining quickly, yet its thickness varies over short distances and is hard to measure with satellites. We developed a way to map thickness in detail from vibrations that travel through the ice. Using data from two field sites, we estimated thickness along many paths and combined them into continuous maps. Our results show that this approach captures fine-scale changes, offering a practical tool to better track ice conditions for climate studies, ecosystems, and safe human activities
Ludovic Pascal, Éléonore Dansereau-Macias, David Didier, Christian Nozais, Luc Sirois, Faten Zouaghi, and Gwénaëlle Chaillou
EGUsphere, https://doi.org/10.5194/egusphere-2026-582, https://doi.org/10.5194/egusphere-2026-582, 2026
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Coastal structures built to protect against rising sea often change local environments. We studied how a breakwater in the Saint Lawrence Estuary altered sediments and marine organisms. The structure led to accumulation of fine, organic-rich sediments with different communities dominated by worms rather than mollusks. Surprisingly, the ability to filter nitrogen from water was similar between altered and natural areas, suggesting ecosystems can maintain some functions through different pathways.
Sébastien Kuchly, Baptiste Auvity, Nicolas Mokus, Matilde Bureau, Paul Nicot, Amaury Fourgeaud, Véronique Dansereau, Antonin Eddi, Stéphane Perrard, Dany Dumont, and Ludovic Moreau
The Cryosphere, 19, 6927–6941, https://doi.org/10.5194/tc-19-6927-2025, https://doi.org/10.5194/tc-19-6927-2025, 2025
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During February and March 2024, we realized a multi-instrument field campaign in the St. Lawrence Estuary, to capture swell-driven sea ice fragmentation. The dataset combines geophones, wave buoys, smartphones, and video recordings with drones, to study wave-ice interactions under natural conditions. It enables analysis of ice thickness, wave properties, and ice motion. Preliminary results show strong consistency across instruments, offering a valuable resource to improve sea ice models.
Elie Dumas-Lefebvre and Dany Dumont
The Cryosphere, 17, 827–842, https://doi.org/10.5194/tc-17-827-2023, https://doi.org/10.5194/tc-17-827-2023, 2023
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By changing the shape of ice floes, wave-induced sea ice breakup dramatically affects the large-scale dynamics of sea ice. As this process is also the trigger of multiple others, it was deemed relevant to study how breakup itself affects the ice floe size distribution. To do so, a ship sailed close to ice floes, and the breakup that it generated was recorded with a drone. The obtained data shed light on the underlying physics of wave-induced sea ice breakup.
Flavienne Bruyant, Rémi Amiraux, Marie-Pier Amyot, Philippe Archambault, Lise Artigue, Lucas Barbedo de Freitas, Guislain Bécu, Simon Bélanger, Pascaline Bourgain, Annick Bricaud, Etienne Brouard, Camille Brunet, Tonya Burgers, Danielle Caleb, Katrine Chalut, Hervé Claustre, Véronique Cornet-Barthaux, Pierre Coupel, Marine Cusa, Fanny Cusset, Laeticia Dadaglio, Marty Davelaar, Gabrièle Deslongchamps, Céline Dimier, Julie Dinasquet, Dany Dumont, Brent Else, Igor Eulaers, Joannie Ferland, Gabrielle Filteau, Marie-Hélène Forget, Jérome Fort, Louis Fortier, Martí Galí, Morgane Gallinari, Svend-Erik Garbus, Nicole Garcia, Catherine Gérikas Ribeiro, Colline Gombault, Priscilla Gourvil, Clémence Goyens, Cindy Grant, Pierre-Luc Grondin, Pascal Guillot, Sandrine Hillion, Rachel Hussherr, Fabien Joux, Hannah Joy-Warren, Gabriel Joyal, David Kieber, Augustin Lafond, José Lagunas, Patrick Lajeunesse, Catherine Lalande, Jade Larivière, Florence Le Gall, Karine Leblanc, Mathieu Leblanc, Justine Legras, Keith Lévesque, Kate-M. Lewis, Edouard Leymarie, Aude Leynaert, Thomas Linkowski, Martine Lizotte, Adriana Lopes dos Santos, Claudie Marec, Dominique Marie, Guillaume Massé, Philippe Massicotte, Atsushi Matsuoka, Lisa A. Miller, Sharif Mirshak, Nathalie Morata, Brivaela Moriceau, Philippe-Israël Morin, Simon Morisset, Anders Mosbech, Alfonso Mucci, Gabrielle Nadaï, Christian Nozais, Ingrid Obernosterer, Thimoté Paire, Christos Panagiotopoulos, Marie Parenteau, Noémie Pelletier, Marc Picheral, Bernard Quéguiner, Patrick Raimbault, Joséphine Ras, Eric Rehm, Llúcia Ribot Lacosta, Jean-François Rontani, Blanche Saint-Béat, Julie Sansoulet, Noé Sardet, Catherine Schmechtig, Antoine Sciandra, Richard Sempéré, Caroline Sévigny, Jordan Toullec, Margot Tragin, Jean-Éric Tremblay, Annie-Pier Trottier, Daniel Vaulot, Anda Vladoiu, Lei Xue, Gustavo Yunda-Guarin, and Marcel Babin
Earth Syst. Sci. Data, 14, 4607–4642, https://doi.org/10.5194/essd-14-4607-2022, https://doi.org/10.5194/essd-14-4607-2022, 2022
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This paper presents a dataset acquired during a research cruise held in Baffin Bay in 2016. We observed that the disappearance of sea ice in the Arctic Ocean increases both the length and spatial extent of the phytoplankton growth season. In the future, this will impact the food webs on which the local populations depend for their food supply and fisheries. This dataset will provide insight into quantifying these impacts and help the decision-making process for policymakers.
Frédéric Dupont, Dany Dumont, Jean-François Lemieux, Elie Dumas-Lefebvre, and Alain Caya
The Cryosphere, 16, 1963–1977, https://doi.org/10.5194/tc-16-1963-2022, https://doi.org/10.5194/tc-16-1963-2022, 2022
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In some shallow seas, grounded ice ridges contribute to stabilizing and maintaining a landfast ice cover. A scheme has already proposed where the keel thickness varies linearly with the mean thickness. Here, we extend the approach by taking into account the ice thickness and bathymetry distributions. The probabilistic approach shows a reasonably good agreement with observations and previous grounding scheme while potentially offering more physical insights into the formation of landfast ice.
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Short summary
This two-part study explores the development of a short-term (up to 48 hours) coastal flood forecasting system along the Quebec coastline. The first part of the study focuses on wave prediction, a main contributor to coastal hazards. The key results of the study show that wave conditions can be accurately predicted during summer, however, the performances of the model in winter are considerably reduced, primarily because predicting sea ice conditions at fine spatial scales remains challenging.
This two-part study explores the development of a short-term (up to 48 hours) coastal flood...
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