42 results on '"Dumont, Dany"'
Search Results
2. Towards the inclusion of wave-ice interactions in large-scale models for the Marginal Ice Zone
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Williams, Timothy, Bennetts, Luke, Dumont, Dany, Squire, Vernon, and Bertino, Laurent
- Subjects
Physics - Atmospheric and Oceanic Physics - Abstract
A wave-ice interaction model for the marginal ice zone (MIZ) is reported, which involves both the attenuation of ocean surface waves by sea ice and the concomitant breaking of the ice by waves. It is specifically designed to embed wave-ice interactions in an operational ice/ocean model for the first time. We investigate different methods of including the wave forcing, and different criteria for determining if they cause floes to break. We also investigate and discuss the effects of using various attenuation models, finding that predicted MIZ widths are quite sensitive to the choice of model. Additional sensitivity tests are performed on: (i) different parameterizations of the floe size distribution (FSD), including the initial FSD used; (ii) the properties of the wave field; and (iii) the sea ice properties such as concentration, thickness and breaking strain. Results are relatively insensitive to FSD parameterization but vary noticeably and systematically with its initial configuration, as they do with properties (ii-iii). An additional, somewhat surprising sensitivity, is the degree of influence of the numerical scheme that performs wave attenuation and advection. This is because a naive implementation of spatial and temporal discretizations can cause the waves to be over-attenuated, leading to a reduction of the predicted MIZ width by a substantial factor. Example simulations intended to represent conditions in the Fram Strait in 2007, which exploit reanalyzed wave and ice model data, are shown to conclude the results section. These compare favorably to estimates of MIZ width using concentrations obtained from remotely-sensed passive microwave images., Comment: 30 pages, 12 figures, 4 tables
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- 2012
3. Turbulent mixing and phytoplankton life history : a Lagrangian versus Eulerian model comparison
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Baudry, Jérémy, Dumont, Dany, and Schloss, Irene R.
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- 2018
4. Contrasting interannual changes in phytoplankton productivity and community structure in the coastal Canadian Arctic Ocean
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Blais, Marjolaine, Ardyna, Mathieu, Gosselin, Michel, Dumont, Dany, Bélanger, Simon, Tremblay, Jean-Éric, Gratton, Yves, Marchese, Christian, and Poulin, Michel
- Published
- 2017
5. A machine learning approach for characterizing soil contamination in the presence of physical site discontinuities and aggregated samples
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Quach, Alyssa Ngu-Oanh, Tabor, Lucie, Dumont, Dany, Courcelles, Benoit, and Goulet, James-A.
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- 2017
- Full Text
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6. The Green Edge cruise: investigating the marginal ice zone processes during late spring and early summer to understand the fate of the Arctic phytoplankton bloom
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Bruyant, Flavienne, primary, Amiraux, Rémi, additional, Amyot, Marie-Pier, additional, Archambault, Philippe, additional, Artigue, Lise, additional, Barbedo de Freitas, Lucas, additional, Bécu, Guislain, additional, Bélanger, Simon, additional, Bourgain, Pascaline, additional, Bricaud, Annick, additional, Brouard, Etienne, additional, Brunet, Camille, additional, Burgers, Tonya, additional, Caleb, Danielle, additional, Chalut, Katrine, additional, Claustre, Hervé, additional, Cornet-Barthaux, Véronique, additional, Coupel, Pierre, additional, Cusa, Marine, additional, Cusset, Fanny, additional, Dadaglio, Laeticia, additional, Davelaar, Marty, additional, Deslongchamps, Gabrièle, additional, Dimier, Céline, additional, Dinasquet, Julie, additional, Dumont, Dany, additional, Else, Brent, additional, Eulaers, Igor, additional, Ferland, Joannie, additional, Filteau, Gabrielle, additional, Forget, Marie-Hélène, additional, Fort, Jérome, additional, Fortier, Louis, additional, Galí, Martí, additional, Gallinari, Morgane, additional, Garbus, Svend-Erik, additional, Garcia, Nicole, additional, Gérikas Ribeiro, Catherine, additional, Gombault, Colline, additional, Gourvil, Priscilla, additional, Goyens, Clémence, additional, Grant, Cindy, additional, Grondin, Pierre-Luc, additional, Guillot, Pascal, additional, Hillion, Sandrine, additional, Hussherr, Rachel, additional, Joux, Fabien, additional, Joy-Warren, Hannah, additional, Joyal, Gabriel, additional, Kieber, David, additional, Lafond, Augustin, additional, Lagunas, José, additional, Lajeunesse, Patrick, additional, Lalande, Catherine, additional, Larivière, Jade, additional, Le Gall, Florence, additional, Leblanc, Karine, additional, Leblanc, Mathieu, additional, Legras, Justine, additional, Lévesque, Keith, additional, Lewis, Kate-M., additional, Leymarie, Edouard, additional, Leynaert, Aude, additional, Linkowski, Thomas, additional, Lizotte, Martine, additional, Lopes dos Santos, Adriana, additional, Marec, Claudie, additional, Marie, Dominique, additional, Massé, Guillaume, additional, Massicotte, Philippe, additional, Matsuoka, Atsushi, additional, Miller, Lisa A., additional, Mirshak, Sharif, additional, Morata, Nathalie, additional, Moriceau, Brivaela, additional, Morin, Philippe-Israël, additional, Morisset, Simon, additional, Mosbech, Anders, additional, Mucci, Alfonso, additional, Nadaï, Gabrielle, additional, Nozais, Christian, additional, Obernosterer, Ingrid, additional, Paire, Thimoté, additional, Panagiotopoulos, Christos, additional, Parenteau, Marie, additional, Pelletier, Noémie, additional, Picheral, Marc, additional, Quéguiner, Bernard, additional, Raimbault, Patrick, additional, Ras, Joséphine, additional, Rehm, Eric, additional, Ribot Lacosta, Llúcia, additional, Rontani, Jean-François, additional, Saint-Béat, Blanche, additional, Sansoulet, Julie, additional, Sardet, Noé, additional, Schmechtig, Catherine, additional, Sciandra, Antoine, additional, Sempéré, Richard, additional, Sévigny, Caroline, additional, Toullec, Jordan, additional, Tragin, Margot, additional, Tremblay, Jean-Éric, additional, Trottier, Annie-Pier, additional, Vaulot, Daniel, additional, Vladoiu, Anda, additional, Xue, Lei, additional, Yunda-Guarin, Gustavo, additional, and Babin, Marcel, additional
- Published
- 2022
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7. A probabilistic seabed–ice keel interaction model
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Dupont, Frédéric, primary, Dumont, Dany, additional, Lemieux, Jean-François, additional, Dumas-Lefebvre, Elie, additional, and Caya, Alain, additional
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- 2022
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8. The Green Edge cruise: investigating the marginal ice zone processes during late spring and early summer to understand the fate of the Arctic phytoplankton bloom
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Bruyant, Flavienne, Amiraux, Rémi, Amyot, Marie-pier, Archambault, Philippe, Artigue, Lise, Barbedo De Freitas, Lucas, Bécu, Guislain, Bélanger, Simon, Bourgain, Pascaline, Bricaud, Annick, Brouard, Etienne, Brunet, Camille, Burgers, Tonya, Caleb, Danielle, Chalut, Katrine, Claustre, Hervé, Cornet-barthaux, Véronique, Coupel, Pierre, Cusa, Marine, Cusset, Fanny, Dadaglio, Laeticia, Davelaar, Marty, Deslongchamps, Gabrièle, Dimier, Céline, Dinasquet, Julie, Dumont, Dany, Else, Brent, Eulaers, Igor, Ferland, Joannie, Filteau, Gabrielle, Forget, Marie-hélène, Fort, Jérome, Fortier, Louis, Galí, Martí, Gallinari, Morgane, Garbus, Svend-erik, Garcia, Nicole, Gérikas Ribeiro, Catherine, Gombault, Colline, Gourvil, Priscilla, Goyens, Clémence, Grant, Cindy, Grondin, Pierre-luc, Guillot, Pascal, Hillion, Sandrine, Hussherr, Rachel, Joux, Fabien, Joy-warren, Hannah, Joyal, Gabriel, Kieber, David, Lafond, Augustin, Lagunas, José, Lajeunesse, Patrick, Lalande, Catherine, Larivière, Jade, Le Gall, Florence, Leblanc, Karine, Leblanc, Mathieu, Legras, Justine, Lévesque, Keith, Lewis, Kate-m., Leymarie, Edouard, Leynaert, Aude, Linkowski, Thomas, Lizotte, Martine, Lopes Dos Santos, Adriana, Marec, Claudie, Marie, Dominique, Massé, Guillaume, Massicotte, Philippe, Matsuoka, Atsushi, Miller, Lisa A., Mirshak, Sharif, Morata, Nathalie, Moriceau, Brivaela, Morin, Philippe-israël, Morisset, Simon, Mosbech, Anders, Mucci, Alfonso, Nadaï, Gabrielle, Nozais, Christian, Obernosterer, Ingrid, Paire, Thimoté, Panagiotopoulos, Christos, Parenteau, Marie, Pelletier, Noémie, Picheral, Marc, Quéguiner, Bernard, Raimbault, Patrick, Ras, Joséphine, Rehm, Eric, Ribot Lacosta, Llúcia, Rontani, Jean-françois, Saint Beat, Blanche, Sansoulet, Julie, Sardet, Noé, Schmechtig, Catherine, Sciandra, Antoine, Sempéré, Richard, Sévigny, Caroline, Toullec, Jordan, Tragin, Margot, Tremblay, Jean-éric, Trottier, Annie-pier, Vaulot, Daniel, Vladoiu, Anda, Xue, Lei, Yunda-guarin, Gustavo, Babin, Marcel, Bruyant, Flavienne, Amiraux, Rémi, Amyot, Marie-pier, Archambault, Philippe, Artigue, Lise, Barbedo De Freitas, Lucas, Bécu, Guislain, Bélanger, Simon, Bourgain, Pascaline, Bricaud, Annick, Brouard, Etienne, Brunet, Camille, Burgers, Tonya, Caleb, Danielle, Chalut, Katrine, Claustre, Hervé, Cornet-barthaux, Véronique, Coupel, Pierre, Cusa, Marine, Cusset, Fanny, Dadaglio, Laeticia, Davelaar, Marty, Deslongchamps, Gabrièle, Dimier, Céline, Dinasquet, Julie, Dumont, Dany, Else, Brent, Eulaers, Igor, Ferland, Joannie, Filteau, Gabrielle, Forget, Marie-hélène, Fort, Jérome, Fortier, Louis, Galí, Martí, Gallinari, Morgane, Garbus, Svend-erik, Garcia, Nicole, Gérikas Ribeiro, Catherine, Gombault, Colline, Gourvil, Priscilla, Goyens, Clémence, Grant, Cindy, Grondin, Pierre-luc, Guillot, Pascal, Hillion, Sandrine, Hussherr, Rachel, Joux, Fabien, Joy-warren, Hannah, Joyal, Gabriel, Kieber, David, Lafond, Augustin, Lagunas, José, Lajeunesse, Patrick, Lalande, Catherine, Larivière, Jade, Le Gall, Florence, Leblanc, Karine, Leblanc, Mathieu, Legras, Justine, Lévesque, Keith, Lewis, Kate-m., Leymarie, Edouard, Leynaert, Aude, Linkowski, Thomas, Lizotte, Martine, Lopes Dos Santos, Adriana, Marec, Claudie, Marie, Dominique, Massé, Guillaume, Massicotte, Philippe, Matsuoka, Atsushi, Miller, Lisa A., Mirshak, Sharif, Morata, Nathalie, Moriceau, Brivaela, Morin, Philippe-israël, Morisset, Simon, Mosbech, Anders, Mucci, Alfonso, Nadaï, Gabrielle, Nozais, Christian, Obernosterer, Ingrid, Paire, Thimoté, Panagiotopoulos, Christos, Parenteau, Marie, Pelletier, Noémie, Picheral, Marc, Quéguiner, Bernard, Raimbault, Patrick, Ras, Joséphine, Rehm, Eric, Ribot Lacosta, Llúcia, Rontani, Jean-françois, Saint Beat, Blanche, Sansoulet, Julie, Sardet, Noé, Schmechtig, Catherine, Sciandra, Antoine, Sempéré, Richard, Sévigny, Caroline, Toullec, Jordan, Tragin, Margot, Tremblay, Jean-éric, Trottier, Annie-pier, Vaulot, Daniel, Vladoiu, Anda, Xue, Lei, Yunda-guarin, Gustavo, and Babin, Marcel
- Abstract
The Green Edge project was designed to investigate the onset, life, and fate of a phytoplankton spring bloom (PSB) in the Arctic Ocean. The lengthening of the ice-free period and the warming of seawater, amongst other factors, have induced major changes in Arctic Ocean biology over the last decades. Because the PSB is at the base of the Arctic Ocean food chain, it is crucial to understand how changes in the Arctic environment will affect it. Green Edge was a large multidisciplinary, collaborative project bringing researchers and technicians from 28 different institutions in seven countries together, aiming at understanding these changes and their impacts on the future. The fieldwork for the Green Edge project took place over two years (2015 and 2016) and was carried out from both an ice camp and a research vessel in Baffin Bay, in the Canadian Arctic. This paper describes the sampling strategy and the dataset obtained from the research cruise, which took place aboard the Canadian Coast Guard ship (CCGS) Amundsen in late spring and early summer 2016. The sampling strategy was designed around the repetitive, perpendicular crossing of the marginal ice zone (MIZ), using not only ship-based station discrete sampling but also high-resolution measurements from autonomous platforms (Gliders, BGC-Argo floats …) and under-way monitoring systems. The dataset is available at https://doi.org/10.17882/86417 (Bruyant et al., 2022).
- Published
- 2022
- Full Text
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9. Green Edge ice camp campaigns : understanding the processes controlling the under-ice Arctic phytoplankton spring bloom
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Massicotte, Philippe, Amiraux, Rémi, Amyot, Marie-Pier, Archambault, Philippe, Aubry, Cyril, Ayotte, Pierre, Bécu, Guislain, Bélanger, Simon, Bruyant, Flavienne, Christiansen-Stowe, Debra, Coupel, Pierre, Dezutter, Thibaud, Dominé, Florent, Dufour, Francis, Dufresne, Christiane, Dumont, Dany, Ferland, Joannie, Forget, Marie-Hélène, Fortier, Louis, Galí, Martí, Galindo, Virginie, Gourdal, Margaux, Grondin, Pierre-Luc, Guillot, Pascal, Guilmette, Caroline, Lacour, Léo, Lagunas, José Luis, Lalande, Catherine, Laliberté, Julien, Lambert Girard, Simon, Larivière, Jade, Lavaud, Johann, LeBaron, Anita, Lemire, Mélanie, Levasseur, Maurice, Marec, Claudie, Massé, Guillaume, Matsuoka, Atsushi, Neukermans, Griet, Oziel, Laurent, Rehm, Eric Carl, Reimer, Erin, Saint-Béat, Blanche, Sansoulet, Julie, Tremblay, Jean-Éric, Verin, Gauthier, Babin, Marcel, Massicotte, Philippe, Amiraux, Rémi, Amyot, Marie-Pier, Archambault, Philippe, Aubry, Cyril, Ayotte, Pierre, Bécu, Guislain, Bélanger, Simon, Bruyant, Flavienne, Christiansen-Stowe, Debra, Coupel, Pierre, Dezutter, Thibaud, Dominé, Florent, Dufour, Francis, Dufresne, Christiane, Dumont, Dany, Ferland, Joannie, Forget, Marie-Hélène, Fortier, Louis, Galí, Martí, Galindo, Virginie, Gourdal, Margaux, Grondin, Pierre-Luc, Guillot, Pascal, Guilmette, Caroline, Lacour, Léo, Lagunas, José Luis, Lalande, Catherine, Laliberté, Julien, Lambert Girard, Simon, Larivière, Jade, Lavaud, Johann, LeBaron, Anita, Lemire, Mélanie, Levasseur, Maurice, Marec, Claudie, Massé, Guillaume, Matsuoka, Atsushi, Neukermans, Griet, Oziel, Laurent, Rehm, Eric Carl, Reimer, Erin, Saint-Béat, Blanche, Sansoulet, Julie, Tremblay, Jean-Éric, Verin, Gauthier, and Babin, Marcel
- Abstract
The Green Edge initiative was developed to investigate the processes controlling the primary productivity and fate of organic matter produced during the Arctic phytoplankton spring bloom (PSB) and to determine its role in the ecosystem. Two field campaigns were conducted in 2015 and 2016 at an ice camp located on landfast sea ice southeast of Qikiqtarjuaq Island in Baffin Bay (67.4797∘ N, 63.7895∘ W). During both expeditions, a large suite of physical, chemical and biological variables was measured beneath a consolidated sea-ice cover from the surface to the bottom (at 360 m depth) to better understand the factors driving the PSB. Key variables, such as conservative temperature, absolute salinity, radiance, irradiance, nutrient concentrations, chlorophyll a concentration, bacteria, phytoplankton and zooplankton abundance and taxonomy, and carbon stocks and fluxes were routinely measured at the ice camp. Meteorological and snow-relevant variables were also monitored. Here, we present the results of a joint effort to tidy and standardize the collected datasets, which will facilitate their reuse in other Arctic studies.
- Published
- 2022
10. Toward food sovereignty for coastal communities of eastern Québec : co-designing a website to support consumption of edible resources from the St. Lawrence River, Estuary, and Gulf
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Fallon, Catherine S., Lemire, Mélanie, Dumont, Dany, Parent, Elizabeth, Figueroa Palacios, Esteban Francisco, Cummings, Isabelle, Brousseau, Julie, Marquis, Marie, Paquet, Nicolas, Plante, Steve, Witteman, Holly, Fallon, Catherine S., Lemire, Mélanie, Dumont, Dany, Parent, Elizabeth, Figueroa Palacios, Esteban Francisco, Cummings, Isabelle, Brousseau, Julie, Marquis, Marie, Paquet, Nicolas, Plante, Steve, and Witteman, Holly
- Abstract
Background. Despite the abundance and proximity of edible marine resources, coastal communities along the St. Lawrence in Eastern Québec rarely consume these resources. Within a community-based food sovereignty project, Manger notre Saint-Laurent (‘‘Sustenance from our St. Lawrence''), members of participating communities (3 nonIndigenous, 1 Indigenous) identified a need for a web-based decision tool to help make informed consumption choices. Methods. We thus aimed to co-design a prototype website that facilitates informed choices about consuming local edible marine resources based on seasonal and regional availability, food safety, nutrition, and sustainability, with community members, regional stakeholders, and experts in user experience design and web development. We conducted 48 interviews with a variety of people over 3 iterative cycles, assessing the prototype's ease of use with a validated measure, the System Usability Scale. Results. Community members, regional stakeholders, and other experts identified problematic elements in initial versions of the website (e.g., confusing symbols). We resolved issues and added features people identified as useful. Usability scores reached ‘‘best imaginable'' for both the second and the third versions and did not differ significantly between sociodemographic groups. The final prototype includes a tool to explore each species and index cards to regroup accurate evidence relevant to each species. Conclusions. Engaging co-designers with different sociodemographic characteristics brought together a variety of perspectives. Several components would not have been included without co-designers' input; other components were greatly improved thanks to their feedback. Co-design approaches in research and intervention development are preferable to foster the inclusion of a variety of people. Once the prototype is programmed and available online, we hope to evaluate the website to determine its effects on food choices.
- Published
- 2022
11. Aerial observations of sea ice breakup by ship waves.
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Dumas-Lefebvre, Elie and Dumont, Dany
- Subjects
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SEA ice , *ICE floes , *ICE navigation , *COASTAL surveillance , *WAVE energy , *ICE , *SHIPS - Abstract
We provide high-resolution in situ observations of wave-induced sea ice breakup in the natural environment. In order to obtain such data, a drone was deployed from the Canadian Coast Guard ship Amundsen as it sailed in the vicinity of large ice floes in Baffin Bay and in the St. Lawrence Estuary, Canada. The footage recorded during these experiments was used to obtain the floe size distribution (FSD) and the temporal evolution of the breakup. Floe-area-weighted FSDs exhibit a modal shape, indicating that a preferential size is generated by wave-induced breakup. Furthermore, the increase of the mode of the distribution with greater thickness indicates that ice thickness plays a defined role in determining the preferential size. Comparison with relevant theory suggests that the maximum floe size is dictated not only by the ice rigidity but also by the incident wavelength. It was also observed that the in-ice wavelength is smaller than the estimated incident wavelength, suggesting that waves responsible for the breakup obey mass loading dispersion. The fact that the breakup advances almost as fast as the wave energy suggests that fatigue might not have been an important physical component during the experiments. Moreover, the observed breakup extents show that thicker ice can attenuate waves less than thinner ice. Overall, this dataset provides key information on wave-induced sea ice breakup and highlights the potential for better understanding the physics of natural sea ice in response to waves. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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12. sj-docx-1-mpp-10.1177_23814683221094477 – Supplemental material for Toward Food Sovereignty for Coastal Communities of Eastern Québec: Co-designing A Website to Support Consumption of Edible Resources from the St. Lawrence River, Estuary, and Gulf
- Author
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Fallon, Catherine, Lemire, Mélanie, Dumont, Dany, Parent, Elizabeth, Figueroa, Esteban, Cummings, Isabelle, Brousseau, Julie, Marquis, Marie, Paquet, Nicolas, Plante, Steve, and Witteman, Holly O.
- Subjects
111799 Public Health and Health Services not elsewhere classified ,FOS: Health sciences - Abstract
Supplemental material, sj-docx-1-mpp-10.1177_23814683221094477 for Toward Food Sovereignty for Coastal Communities of Eastern Québec: Co-designing A Website to Support Consumption of Edible Resources from the St. Lawrence River, Estuary, and Gulf by Catherine Fallon, Mélanie Lemire, Dany Dumont, Elizabeth Parent, Esteban Figueroa, Isabelle Cummings, Julie Brousseau, Marie Marquis, Nicolas Paquet, Steve Plante and Holly O. Witteman in MDM Policy & Practice
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- 2022
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13. Toward Food Sovereignty for Coastal Communities of Eastern Québec: Co-designing A Website to Support Consumption of Edible Resources from the St. Lawrence River, Estuary, and Gulf
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Fallon, Catherine, primary, Lemire, Mélanie, additional, Dumont, Dany, additional, Parent, Elizabeth, additional, Figueroa, Esteban, additional, Cummings, Isabelle, additional, Brousseau, Julie, additional, Marquis, Marie, additional, Paquet, Nicolas, additional, Plante, Steve, additional, and Witteman, Holly O., additional
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- 2022
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14. A discrete interaction numerical model for coagulation and fragmentation of marine detritic particulate matter (Coagfrag v.1)
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Gremion, Gwenaëlle, primary, Nadeau, Louis-Philippe, additional, Dufresne, Christiane, additional, Schloss, Irene R., additional, Archambault, Philippe, additional, and Dumont, Dany, additional
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- 2021
- Full Text
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15. Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya
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Olivier, Frederic, Gaillard, Blandine, Thebault, Julien, Meziane, Tarik, Tremblay, Rejean, Dumont, Dany, Belanger, Simon, Gosselin, Michel, Jolivet, Aurelie, Chauvaud, Laurent, Martel, Andre L., Rysgaard, Soren, Olivier, Anne-helene, Pettre, Julien, Mars, Jerome, Gerber, Silvain, Archambault, Philippe, Olivier, Frederic, Gaillard, Blandine, Thebault, Julien, Meziane, Tarik, Tremblay, Rejean, Dumont, Dany, Belanger, Simon, Gosselin, Michel, Jolivet, Aurelie, Chauvaud, Laurent, Martel, Andre L., Rysgaard, Soren, Olivier, Anne-helene, Pettre, Julien, Mars, Jerome, Gerber, Silvain, and Archambault, Philippe
- Abstract
Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a 'sea-ice algae-benthos' to a 'phytoplankton-zooplankton' dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the food exported to the seafloor. Bathyal bivalve Astarte moerchi living at 600m depth in northern Baffin Bay reveals a clear shift in growth variations and Ba/Ca ratios since the late 1970s, which we relate to a change in food availability. Tissue fatty acid compositions show that this species feeds mainly on microalgae exported from the euphotic zone to the seabed. We, therefore, suggest that changes in pelagic-benthic coupling are likely due either to local changes in sea ice dynamics, mediated through bottom-up regulation exerted by sea ice on phytoplankton production, or to a mismatch between phytoplankton bloom and zooplankton grazing due to phenological change. Both possibilities allow a more regular and increased transfer of food to the seabed. This article is part of the theme issue 'The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning'.
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- 2020
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16. Green Edge ice camp campaigns: understanding the processes controlling the under-ice Arctic phytoplankton spring bloom
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Massicotte, Philippe, Amiraux, Rémi, Amyot, Marie-pier, Archambault, Philippe, Ardyna, Mathieu, Arnaud, Laurent, Artigue, Lise, Aubry, Cyril, Ayotte, Pierre, Bécu, Guislain, Bélanger, Simon, Benner, Ronald, Bittig, Henry C, Bricaud, Annick, Brossier, Eric, Bruyant, Flavienne, Chauvaud, Laurent, Christiansen-stowe, Debra, Claustre, Hervé, Cornet-barthaux, Véronique, Coupel, Pierre, Cox, Christine, Delaforge, Aurélie, Dezutter, Thibault, Dimier, Céline, Dominé, Florent, Dufour, Francis, Dufresne, Christiane, Dumont, Dany, Ehn, Jens, Else, Brent, Ferland, Joannie, Forget, Marie-hélène, Fortier, Louis, Gali, Marti, Galindo, Virginie, Gallinari, Morgane, Garcia, Nicole, Gerikas-ribeiro, Catherine, Gourdal, Margaux, Gourvil, Priscilla, Goyens, Clemence, Grondin, Pierre-luc, Guillot, Pascal, Guilmette, Caroline, Houssais, Marie-noëlle, Joux, Fabien, Lacour, Léo, Lacour, Thomas, Lafond, Augustin, Lagunas, José, Lalande, Catherine, Laliberté, Julien, Lambert-girard, Simon, Larivière, Jade, Lavaud, Johann, Lebaron, Anita, Leblanc, Karine, Le Gall, Florence, Legras, Justine, Lemire, Mélanie, Levasseur, Maurice, Leymarie, Edouard, Leynaert, Aude, Lopes Dos Santos, Adriana, Lourenço, Antonio, Mah, David, Marec, Claudie, Marie, Dominique, Martin, Nicolas, Marty, Constance, Marty, Sabine, Massé, Guillaume, Matsuoka, Atsushi, Matthes, Lisa, Moriceau, Brivaela, Muller, Pierre-emmanuel, Mundy, Christopher-john, Neukermans, Griet, Oziel, Laurent, Panagiotopoulos, Christos, Pangazi, Jean-jacques, Picard, Ghislain, Picheral, Marc, Pinczon Du Sel, France, Pogorzelec, Nicole, Probert, Ian, Queguiner, Bernard, Raimbault, Patrick, Ras, Joséphine, Rehm, Eric, Reimer, Erin, Rontani, Jean-françois, Rysgaard, Soren, Saint-béat, Blanche, Sampei, Makoto, Sansoulet, Julie, Schmidt, Sabine, Sempere, Richard, Sevigny, Caroline, Shen, Yuan, Tragin, Margot, Tremblay, Jean-eric, Vaulot, Daniel, Verin, Gauthier, Vivier, Frédéric, Vladoiu, Anda, Whitehead, Jeremy, Babin, Marcel, Massicotte, Philippe, Amiraux, Rémi, Amyot, Marie-pier, Archambault, Philippe, Ardyna, Mathieu, Arnaud, Laurent, Artigue, Lise, Aubry, Cyril, Ayotte, Pierre, Bécu, Guislain, Bélanger, Simon, Benner, Ronald, Bittig, Henry C, Bricaud, Annick, Brossier, Eric, Bruyant, Flavienne, Chauvaud, Laurent, Christiansen-stowe, Debra, Claustre, Hervé, Cornet-barthaux, Véronique, Coupel, Pierre, Cox, Christine, Delaforge, Aurélie, Dezutter, Thibault, Dimier, Céline, Dominé, Florent, Dufour, Francis, Dufresne, Christiane, Dumont, Dany, Ehn, Jens, Else, Brent, Ferland, Joannie, Forget, Marie-hélène, Fortier, Louis, Gali, Marti, Galindo, Virginie, Gallinari, Morgane, Garcia, Nicole, Gerikas-ribeiro, Catherine, Gourdal, Margaux, Gourvil, Priscilla, Goyens, Clemence, Grondin, Pierre-luc, Guillot, Pascal, Guilmette, Caroline, Houssais, Marie-noëlle, Joux, Fabien, Lacour, Léo, Lacour, Thomas, Lafond, Augustin, Lagunas, José, Lalande, Catherine, Laliberté, Julien, Lambert-girard, Simon, Larivière, Jade, Lavaud, Johann, Lebaron, Anita, Leblanc, Karine, Le Gall, Florence, Legras, Justine, Lemire, Mélanie, Levasseur, Maurice, Leymarie, Edouard, Leynaert, Aude, Lopes Dos Santos, Adriana, Lourenço, Antonio, Mah, David, Marec, Claudie, Marie, Dominique, Martin, Nicolas, Marty, Constance, Marty, Sabine, Massé, Guillaume, Matsuoka, Atsushi, Matthes, Lisa, Moriceau, Brivaela, Muller, Pierre-emmanuel, Mundy, Christopher-john, Neukermans, Griet, Oziel, Laurent, Panagiotopoulos, Christos, Pangazi, Jean-jacques, Picard, Ghislain, Picheral, Marc, Pinczon Du Sel, France, Pogorzelec, Nicole, Probert, Ian, Queguiner, Bernard, Raimbault, Patrick, Ras, Joséphine, Rehm, Eric, Reimer, Erin, Rontani, Jean-françois, Rysgaard, Soren, Saint-béat, Blanche, Sampei, Makoto, Sansoulet, Julie, Schmidt, Sabine, Sempere, Richard, Sevigny, Caroline, Shen, Yuan, Tragin, Margot, Tremblay, Jean-eric, Vaulot, Daniel, Verin, Gauthier, Vivier, Frédéric, Vladoiu, Anda, Whitehead, Jeremy, and Babin, Marcel
- Abstract
The Green Edge initiative was developed to investigate the processes controlling the primary productivity and the fate of organic matter produced during the Arctic phytoplankton spring bloom (PSB) and to determine its role in the ecosystem. Two field campaigns were conducted in 2015 and 2016 at an ice camp located on landfast sea ice southeast of Qikiqtarjuaq Island in Baffin Bay (67.4797N, 63.7895W). During both expeditions, a large suite of physical, chemical and biological variables was measured beneath a consolidated sea ice cover from the surface to the bottom at 360 m depth to better understand the factors driving the PSB. Key variables such as temperature, salinity, radiance, irradiance, nutrient concentrations, chlorophyll-a concentration, bacteria, phytoplankton and zooplankton abundance and taxonomy, carbon stocks and fluxes were routinely measured at the ice camp. Here, we present the results of a joint effort to tidy and standardize the collected data sets that will facilitate their reuse in other Arctic studies. The dataset is available at http://www.seanoe.org/data/00487/59892/ (Massicotte et al., 2019a).
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- 2020
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17. Measurements of Enhanced Near-Surface Turbulence Under Windrows
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Zippel, Seth F., Maksym, Ted, Scully, Malcolm, Sutherland, Peter, Dumont, Dany, Zippel, Seth F., Maksym, Ted, Scully, Malcolm, Sutherland, Peter, and Dumont, Dany
- Abstract
Observations of waves, winds, turbulence, and the geometry and circulation of windrows were made in a shallow bay in the winter of 2018 outside of Rimouski, Québec. Water velocities measured from a forward-looking pulse-coherent ADCP mounted on a small zodiac show spanwise (cross-windrow) convergence, streamwise (downwind) velocity enhancement, and downwelling in the windrows, consistent with the view that windrows are the result of counter-rotating pairs of wind-aligned vortices. The spacing of windrows, measured with acoustic backscatter and with surface imagery, was measured to be approximately twice the water depth, which suggests an aspect ratio of 1. The magnitude and vertical distribution of turbulence measured from the ADCP are consistent with a previous scaling and observations of near-surface turbulence under breaking waves, with dissipation rates larger, and decaying faster vertically than what is expected from a shear-driven boundary layer. Measurements of dissipation rate are partitioned to within, and outside of the windrow convergence zones, and measurements inside the convergence zones are found to be nearly an order of magnitude larger than those outside with similar vertical structure. A ratio of time scales suggests that turbulence likely dissipates before it can be advected horizontally into convergences, but the advection of wave energy into convergences may elevate the surface flux of TKE and could explain the elevated turbulence in the windrows. These results add to a limited number of conflicting observations of turbulence variability due to windrows, which may modify gas flux, and heat and momentum transport in the surface boundary layer.
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- 2020
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18. Ice island thinning: rates and model calibration with in situ observations from Baffin Bay, Nunavut
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Crawford, Anna J., primary, Mueller, Derek, additional, Crocker, Gregory, additional, Mingo, Laurent, additional, Desjardins, Luc, additional, Dumont, Dany, additional, and Babin, Marcel, additional
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- 2020
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19. Green Edge ice camp campaigns: understanding the processes controlling the under-ice Arctic phytoplankton spring bloom
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Massicotte, Philippe, primary, Amiraux, Rémi, additional, Amyot, Marie-Pier, additional, Archambault, Philippe, additional, Ardyna, Mathieu, additional, Arnaud, Laurent, additional, Artigue, Lise, additional, Aubry, Cyril, additional, Ayotte, Pierre, additional, Bécu, Guislain, additional, Bélanger, Simon, additional, Benner, Ronald, additional, Bittig, Henry C., additional, Bricaud, Annick, additional, Brossier, Éric, additional, Bruyant, Flavienne, additional, Chauvaud, Laurent, additional, Christiansen-Stowe, Debra, additional, Claustre, Hervé, additional, Cornet-Barthaux, Véronique, additional, Coupel, Pierre, additional, Cox, Christine, additional, Delaforge, Aurelie, additional, Dezutter, Thibaud, additional, Dimier, Céline, additional, Domine, Florent, additional, Dufour, Francis, additional, Dufresne, Christiane, additional, Dumont, Dany, additional, Ehn, Jens, additional, Else, Brent, additional, Ferland, Joannie, additional, Forget, Marie-Hélène, additional, Fortier, Louis, additional, Galí, Martí, additional, Galindo, Virginie, additional, Gallinari, Morgane, additional, Garcia, Nicole, additional, Gérikas Ribeiro, Catherine, additional, Gourdal, Margaux, additional, Gourvil, Priscilla, additional, Goyens, Clemence, additional, Grondin, Pierre-Luc, additional, Guillot, Pascal, additional, Guilmette, Caroline, additional, Houssais, Marie-Noëlle, additional, Joux, Fabien, additional, Lacour, Léo, additional, Lacour, Thomas, additional, Lafond, Augustin, additional, Lagunas, José, additional, Lalande, Catherine, additional, Laliberté, Julien, additional, Lambert-Girard, Simon, additional, Larivière, Jade, additional, Lavaud, Johann, additional, LeBaron, Anita, additional, Leblanc, Karine, additional, Le Gall, Florence, additional, Legras, Justine, additional, Lemire, Mélanie, additional, Levasseur, Maurice, additional, Leymarie, Edouard, additional, Leynaert, Aude, additional, Lopes dos Santos, Adriana, additional, Lourenço, Antonio, additional, Mah, David, additional, Marec, Claudie, additional, Marie, Dominique, additional, Martin, Nicolas, additional, Marty, Constance, additional, Marty, Sabine, additional, Massé, Guillaume, additional, Matsuoka, Atsushi, additional, Matthes, Lisa, additional, Moriceau, Brivaela, additional, Muller, Pierre-Emmanuel, additional, Mundy, Christopher-John, additional, Neukermans, Griet, additional, Oziel, Laurent, additional, Panagiotopoulos, Christos, additional, Pangrazi, Jean-Jacques, additional, Picard, Ghislain, additional, Picheral, Marc, additional, Pinczon du Sel, France, additional, Pogorzelec, Nicole, additional, Probert, Ian, additional, Quéguiner, Bernard, additional, Raimbault, Patrick, additional, Ras, Joséphine, additional, Rehm, Eric, additional, Reimer, Erin, additional, Rontani, Jean-François, additional, Rysgaard, Søren, additional, Saint-Béat, Blanche, additional, Sampei, Makoto, additional, Sansoulet, Julie, additional, Schmechtig, Catherine, additional, Schmidt, Sabine, additional, Sempéré, Richard, additional, Sévigny, Caroline, additional, Shen, Yuan, additional, Tragin, Margot, additional, Tremblay, Jean-Éric, additional, Vaulot, Daniel, additional, Verin, Gauthier, additional, Vivier, Frédéric, additional, Vladoiu, Anda, additional, Whitehead, Jeremy, additional, and Babin, Marcel, additional
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- 2020
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20. Measurements of Enhanced Near-Surface Turbulence under Windrows
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Zippel, Seth F., primary, Maksym, Ted, additional, Scully, Malcolm, additional, Sutherland, Peter, additional, and Dumont, Dany, additional
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- 2020
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21. The evolution of light and vertical mixing across a phytoplankton ice-edge bloom
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Randelhoff, Achim, Ozierm, Laurent, Massicotte, Philippe, Becu, Guislain, Gali, Marti, Lacour, Leo, Dumont, Dany, Vladoiu, Anda, Marec, Claudie, Bruyant, Flavienne, Houssais, Marie-noelle, Tremblay, Jean-eric, Deslongchamps, Gabriele, Babin, Marcel, Randelhoff, Achim, Ozierm, Laurent, Massicotte, Philippe, Becu, Guislain, Gali, Marti, Lacour, Leo, Dumont, Dany, Vladoiu, Anda, Marec, Claudie, Bruyant, Flavienne, Houssais, Marie-noelle, Tremblay, Jean-eric, Deslongchamps, Gabriele, and Babin, Marcel
- Abstract
During summer, phytoplankton can bloom in the Arctic Ocean, both in open water and under ice, often strongly linked to the retreating ice edge. There, the surface ocean responds to steep lateral gradients in ice melt, mixing, and light input, shaping the Arctic ecosystem in unique ways not found in other regions of the world ocean. In 2016, we sampled a high-resolution grid of 135 hydrographic stations in Baffin Bay as part of the Green Edge project to study the ice-edge bloom, including turbulent vertical mixing, the under-ice light field, concentrations of inorganic nutrients, and phytoplankton biomass. We found pronounced differences between an Atlantic sector dominated by the warm West Greenland Current and an Arctic sector with surface waters originating from the Canadian archipelago. Winter overturning and thus nutrient replenishment was hampered by strong haline stratification in the Arctic domain, whereas close to the West Greenland shelf, weak stratification permitted winter mixing with high-nitrate Atlantic-derived waters. Using a space-for-time approach, we linked upper ocean dynamics to the phytoplankton bloom trailing the retreating ice edge. In a band of 60 km (or 15 days) around the ice edge, the upper ocean was especially affected by a freshened surface layer. Light climate, as evidenced by deep 0.415 mol m(-2) d(-1) isolumes, and vertical mixing, as quantified by shallow mixing layer depths, should have permitted significant net phytoplankton growth more than 100 km into the pack ice at ice concentrations close to 100%. Yet, under-ice biomass was relatively low at 20 mg chlorophyll-a m(-2) and depth-integrated total chlorophyll-a (0-80 m) peaked at an average value of 75 mg chlorophyll-a m(-2) only around 10 days after ice retreat. This phenological peak may hence have been the delayed result of much earlier bloom initiation and demonstrates the importance of temporal dynamics for constraints of Arctic marine primary production.
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- 2019
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22. Observations of turbulence and the geometry and circulation of windrows in a small bay in the St. Lawrence Estuary
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Zippel, Seth F., Maksym, Ted, Scully, Malcolm E., Sutherland, Peter, Dumont, Dany, Zippel, Seth F., Maksym, Ted, Scully, Malcolm E., Sutherland, Peter, and Dumont, Dany
- Abstract
Measurements of ocean turbulence, waves, and the geometry and circulation of windrows were made over 5 days in early March in a small bay in the St. Lawrence Estuary. Measurements were made from a small zodiac and from a SWIFT drifter. Two acoustic doppler velocity profilers (ADCPs) were used from the zodiac to measure water velocity and turbulent kinetic energy (TKE) dissipation rates near the surface. The acoustic backscatter from the ADCPs was used in conjunction with a GPS to map the location and spacing of wind aligned rows of bubbles. The SWIFT drifter provided measurements of waves, wind stress, and secondary measurements of TKE dissipation rates. Imagery of the surface was taken with a GoPro camera mounted on the zodiac, and with a DJI MavicPro quadcopter., Funding was provided by the Woods Hole Oceanographic Institute’s Postdoctoral Scholar Program and by the Interdisciplinary Award. This work was also partially supported by the Centre National d’Études Spatiales (CNES) project WAVE-ICE (PS), and the project WAVESCALE under the “Laboratoire d’Excellence” LabexMER (ANR-10-LABX-19) co-funded by a grant from the French government under the program “Investissements d’Avenir” (PS). The BicWin experiment during which this study occurred is funded by the MEOPAR Network of Centers of Excellence (DD) and is a contribution to the research program of Québec-Océan.
- Published
- 2019
23. Modelling Coastal Flood Propagation under Sea Level Rise: A Case Study in Maria, Eastern Canada
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Didier, David, primary, Bandet, Marion, additional, Bernatchez, Pascal, additional, and Dumont, Dany, additional
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- 2019
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24. The evolution of light and vertical mixing across a phytoplankton ice-edge bloom
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Randelhoff, Achim, primary, Oziel, Laurent, additional, Massicotte, Philippe, additional, Bécu, Guislain, additional, Galí, Martí, additional, Lacour, Léo, additional, Dumont, Dany, additional, Vladoiu, Anda, additional, Marec, Claudie, additional, Bruyant, Flavienne, additional, Houssais, Marie-Noëlle, additional, Tremblay, Jean-Éric, additional, Deslongchamps, Gabrièle, additional, and Babin, Marcel, additional
- Published
- 2019
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25. Marginal ice zone thickness and extent due to wave radiation stress.
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Sutherland, Peter, Dumont, Dany, Sutherland, Peter, and Dumont, Dany
- Abstract
Ocean surface wave radiation stress represents the flux of momentum due to the waves. When waves are dissipated or reflected by sea ice, that momentum is absorbed or reflected, resulting in a horizontal forcing which frequently compresses the ice. In this work, wave radiation stress is used to estimate the compressive force applied by waves to the marginal ice zone (MIZ). It is balanced by an ice internal compressive stress based on Mohr-Coulomb granular materials theory. The ice internal stress can be related to ice thickness, allowing this force balance to be used as a model for the estimation of MIZ ice thickness. The model was validated and tested using data collected during two field campaigns in the St. Lawrence Estuary in 2016 and 2017. Modelled ice thickness was found to be consistent with the mean measured ice thickness over the conditions available. The range of validity of the model is discussed, and a definition of MIZ extent, based on the relative strength of wind and wave forcing, is proposed.
- Published
- 2018
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26. Floe Size Effect on Wave-Ice Interactions: Possible Effects, Implementation in Wave Model, and Evaluation
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Boutin, Guillaume, Ardhuin, Fabrice, Dumont, Dany, Sevigny, Caroline, Girard Ardhuin, Fanny, Accensi, Mickael, Boutin, Guillaume, Ardhuin, Fabrice, Dumont, Dany, Sevigny, Caroline, Girard Ardhuin, Fanny, and Accensi, Mickael
- Abstract
Wind waves may play an important role in the evolution of sea ice. That role is largely determined by how fast the ice layer dissipates the wave energy. The transition from a continuous layer of ice to a series of broken floes is expected to have a strong impact on the several attenuation processes. Here we explore the possible effects of basal friction, scattering, and dissipation within the ice layer. The ice is treated as a single layer that can be fractured in many floes. Dissipation associated with ice flexure is evaluated using an anelastic linear dissipation and a cubic inelastic viscous dissipation. Tests aiming to reproduce a Marginal Ice Zone are used to discuss the effects of each process separately. Attenuation is exponential for friction and scattering. Scattering produces an increase in the wave height near the ice edge and broadens the wave directional spectrum, especially for short-period waves. The nonlinear inelastic dissipation is larger for larger wave heights as long as the ice is not broken. These effects are combined in a realistic simulation of an ice break-up event observed south of Svalbard in 2010. The recorded rapid shift from a strong attenuation to little attenuation when the ice is broken is only reproduced when using a nonlinear dissipation that vanishes when the ice is broken. A preliminary pan-Arctic test of these different parameterizations suggests that inelastic dissipation alone is not enough and requires its combination with basal friction.
- Published
- 2018
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27. Éducation à l'environnement et au développement durable du Saint-Laurent: une démarche éducative pour susciter les apprentissages et développer le pouvoir agir de jeunes Québécois du secondaire.
- Author
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Morin, Émilie, Therriault, Geneviève, Bader, Barbara, and Dumont, Dany
- Published
- 2021
28. A zooplankton diel vertical migration parameterization for coastal marine ecosystem modeling.
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Nocera, Ariadna Celina, Dumont, Dany, and Schloss, Irene R.
- Subjects
PARAMETERIZATION ,AQUATIC organisms ,LOCAL foods ,MARINE ecology ,SWIMMING - Abstract
A simple parameterization of zooplankton vertical swimming is proposed as a way to reproduce the diel vertical migration (DVM) behavior, which refers to the daily descent of aquatic organisms hundreds of meters below the surface at dawn and their return to the surface at dusk, a phenomenon that is widespread among most zooplankton species. The swimming behavior is mechanistically parameterized as a function of the local irradiance and food availability, and is incorporated in a simple biogeochemical model coupled with a water column turbulence model in an Eulerian framework. The DVM behavior and its impact on plankton dynamics are investigated in an idealised configuration representing a marine coastal ecosystem. The sensitivity of the model to key parameters such as the zooplankton swimming speed, grazing rate, the optimal irradiance and turbulent diffusivity is evaluated with respect to three metrics representing the actual DVM behavior, the zooplankton-to-phytoplankton grazing coupling efficiency, and the vertical carbon export. Results show that the parameterization is able to reproduce the main characteristics of present knowledge about zooplankton DVM, and that the associated ecosystem responses are strongly sensitive to the maximum grazing rate, and moderately sensitive to other parameters. [ABSTRACT FROM AUTHOR]
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- 2020
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29. Marginal Ice Zone Thickness and Extent due to Wave Radiation Stress
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Sutherland, Peter, primary and Dumont, Dany, additional
- Published
- 2018
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30. LiDAR Validation of a Video-Derived Beachface Topography on a Tidal Flat
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Didier, David, Bernatchez, Pascal, Augereau, Emmanuel, Caulet, Charles, Dumont, Dany, Bismuth, Eliott, Cormier, Louis, Floc'H, France, Delacourt, Christophe, Didier, David, Bernatchez, Pascal, Augereau, Emmanuel, Caulet, Charles, Dumont, Dany, Bismuth, Eliott, Cormier, Louis, Floc'H, France, and Delacourt, Christophe
- Abstract
Increasingly used shore-based video stations enable a high spatiotemporal frequency analysis of shoreline migration. Shoreline detection techniques combined with hydrodynamic conditions enable the creation of digital elevation models (DEMs). However, shoreline elevations are often estimated based on nearshore process empirical equations leading to uncertainties in video-based topography. To achieve high DEM correspondence between both techniques, we assessed video-derived DEMs against LiDAR surveys during low energy conditions. A newly installed video system on a tidal flat in the St. Lawrence Estuary, Atlantic Canada, served as a test case. Shorelines were automatically detected from time-averaged (TIMEX) images using color ratios in low energy conditions synchronously with mobile terrestrial LiDAR during two different surveys. Hydrodynamic (waves and tides) data were recorded in-situ, and established two different cases of water elevation models as a basis for shoreline elevations. DEMs were created and tested against LiDAR. Statistical analysis of shoreline elevations and migrations were made, and morphological variability was assessed between both surveys. Results indicate that the best shoreline elevation model includes both the significant wave height and the mean water level. Low energy conditions and in-situ hydrodynamic measurements made it possible to produce video-derived DEMs virtually as accurate as a LiDAR product, and therefore make an effective tool for coastal managers.
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- 2017
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31. LiDAR Validation of a Video-Derived Beachface Topography on a Tidal Flat
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Didier, David, primary, Bernatchez, Pascal, additional, Augereau, Emmanuel, additional, Caulet, Charles, additional, Dumont, Dany, additional, Bismuth, Eliott, additional, Cormier, Louis, additional, Floc’h, France, additional, and Delacourt, Christophe, additional
- Published
- 2017
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32. Notre Golfe : l’émergence d’un réseau intersectoriel pour l’étude de l’environnement socioécologique du golfe du Saint-Laurent
- Author
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Archambault, Philippe, Grant, Cindy, Audet, René, Bader, Barbara, Bourgault, Daniel, Cusson, Mathieu, Doyon, Sabrina, Dumont, Dany, Lamalle, Sandy, Levasseur, Maurice, Morin, Émilie, Pelletier, Émilien, Schloss, Irene, St-Onge, Guillaume, Therriault, Geneviève, Tremblay, Hugo, Tremblay, Jean-Éric, Tremblay, Réjean, Plante, Steve, Archambault, Philippe, Grant, Cindy, Audet, René, Bader, Barbara, Bourgault, Daniel, Cusson, Mathieu, Doyon, Sabrina, Dumont, Dany, Lamalle, Sandy, Levasseur, Maurice, Morin, Émilie, Pelletier, Émilien, Schloss, Irene, St-Onge, Guillaume, Therriault, Geneviève, Tremblay, Hugo, Tremblay, Jean-Éric, Tremblay, Réjean, and Plante, Steve
- Abstract
Notre Golfe est un réseau d’innovation intersectoriel pour l’étude de l’environnement socioécologique du golfe du Saint-Laurent. Issu d’un partenariat entre organisations publiques et privées, le réseau a pour objectif de favoriser l’élaboration et la mise en oeuvre des projets de recherche interdisciplinaire ciblant des questions prioritaires en lien avec une éventuelle exploration et exploitation des hydrocarbures. Parallèlement, les membres du réseau rédigeront un ouvrage sur l’état des connaissances en appui à la prise de décisions dans le cas d’un éventuel développement de cette filière. -- Mots-clés : environnement, golfe du Saint-Laurent, hydrocarbures, interdisciplinarité, intersectorialité. -- Abstract : Notre Golfe (Our Gulf) is a cross-sectoral innovation network for studying the socio-ecological environment of the Gulf of St. Lawrence (Canada). The network, which is a partnership between public and private organizations, aims to promote the development and implementation of interdisciplinary research projects targeting priority issues related to the possible exploitation of oil and gas. In parallel, the members of the network will produce a report on the state of knowledge to support decision making in the context of a possible development of this industry. -- Keywords : environment, Gulf of St. Lawrence, interdisciplinarity, intersectoral, oil and gas.
- Published
- 2016
33. Experimental Assessment of the Performance of High-Frequency CODAR and WERA Radars to Measure Ocean Currents in Partially Ice-Covered Waters
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Kamli, Emna, primary, Chavanne, Cédric, additional, and Dumont, Dany, additional
- Published
- 2016
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34. Sensitivity of the Arctic and North Atlantic Oceans to the Bering Strait inflow: A modeling study
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Ness, Borghild, Counillon, François, and Dumont, Dany
- Subjects
Ocean model ,Salinity ,Arctic ,Freshwater ,Hybrid coordinates ,HYCOM ,Bering Strait - Abstract
Water from the Pacific Ocean flowing through the Bering Strait (BS) influences the circulation, heat and salt budget of the Arctic. With salinity between 31.4 and 32.9, it contributes a significantly amount to the Beaufort Gyre fresh water reservoir. The hydrography and volume transport of this inflow vary significantly over a seasonal cycle. Warm water intrusions may act as a trigger for the onset of the seasonal melt of ice, as in the 2007 extreme event. In the current version of the TOPAZ system the BS inflow is simulated with a constant barotropic inflow and a mean seasonal hydrographic cycle. A modeling approach is adopted to understand the importance of the seasonal and inter-annual variability of the transport and the hydrography of the Bering Strait inflow for the Arctic and North Atlantic oceanic climate., Technical Report no. 317.
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- 2010
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35. Validation of ice drift in a HYCOM model of the Fram Strait
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Dumont, Dany and Bertino, Laurent
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Ocean ,Ocean model ,Arctic ,Sea ice ,Data assimilation ,TOPAZ ,Fram Strait ,HYCOM ,Forecasting - Abstract
The work presents the results of a validation study of the TOPAZ ice drift in the Arctic with different data sets including North Pole Stations, the International Arctic Buoy Program, and CERSAT drift data. TOPAZ is based on the HYCOM model with an elastic-viscous-plastic sea ice model. A regional nested model of the Fram Strait is used to assess the performance at high resolution (3.5 km). The temporal variability, mostly driven by the atmospheric forcing, is well simulated, but the drift amplitude is generally underestimated due to a documented bias towards low oceanic surface currents in this area. The coarse resolution TOPAZ model is also compared with data all over the Arctic Ocean, including a comparison between modeled and observed mean ice concentration in the Ajurak area., NERSC Technical Report no. 315. Funded by Exxon Mobil, Contract no. 08351
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- 2010
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36. Numerical simulations of the spread of floating passive tracer released at the Old Harry prospect
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Bourgault, Daniel, primary, Cyr, Frédéric, additional, Dumont, Dany, additional, and Carter, Angela, additional
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- 2014
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37. Modélisation du pont de glace et des processus océaniques à méso-échelle dans la polynie des Eaux du Nord.
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Dumont, Dany and Dumont, Dany
- Abstract
Un modèle numérique de circulation océanique couplé à un modèle dynamique- thermodynamique de glace de mer est développé et utilisé pour étudier certains processus physiques de méso-échelle importants pour la formation et le maintien de la polynie des Eaux du Nord et de son écosystème. En première partie, on s'intéresse aux aspects dynamiques de la formation et du maintien du pont de glace dans des conditions idéalisées et réalistes. Une étude de sensibilité de la stabilité du pont de glace en fonction des principaux paramètres dynamiques révèle le caractère fondamental de la cohésion dans la formation du pont de glace à l'entrée du détroit de Nares. Pour une contrainte de vent donnée, il existe une valeur de cohésion critique au-delà de laquelle un pont de glace stable ne peut se former. Le profil et la position de l'arche sont adéquatement simulés et la solution est invariante en fonction de l'orientation de la grille sphérique et de la rugosité des frontières. La position et la forme du pont de glace sont également simulées conformément aux observations dans des conditions réalistes. Par contre, en l'absence de données d'épaisseurs fiables et suffisantes et considérant la grande importance de l'historique des forçages dynamiques et thermodynamiques sur les conditions de glace, il est difficile d'identifier une valeur ou un intervalle optimal pour e, le paramètre qui contrôle la cohésion. Les résultats suggèrent toutefois qu'un échantillonnage judicieusement choisi de l'épaisseur, par exemple le long d'un transect perpendiculaire au chenal, permettrait de comparer directement le modèle aux observations et ainsi, potentiellement, de raffiner la paramétrisation du modèle. En deuxième partie, on s'intéresse à la réponse océanique de la polynie au vent et à la présence d'un pont de glace, c'est-à-dire à une discontinuité spatiale du couvert de glace. La circulation générale dans le domaine est mise en branle en premier lieu par les conditions aux frontières ouvertes.
- Published
- 2010
38. Modeling Wind-Driven Circulation and Landfast Ice-Edge Processes during Polynya Events in Northern Baffin Bay
- Author
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Dumont, Dany, primary, Gratton, Yves, primary, and Arbetter, Todd E., additional
- Published
- 2010
- Full Text
- View/download PDF
39. Modeling the Dynamics of the North Water Polynya Ice Bridge
- Author
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Dumont, Dany, primary, Gratton, Yves, primary, and Arbetter, Todd E., additional
- Published
- 2009
- Full Text
- View/download PDF
40. Étude de la compétition entre l'omble de fontaine (Salvelinus fontinalis) et le meunier noir (Catostomus commersoni) : expériences contrôlées en nature
- Author
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Dumont, Dany and Dumont, Dany
- Published
- 1993
41. Supplementary material Olivier F et al revised 2020.docx from Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya
- Author
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Olivier, Frédéric, Gaillard, Blandine, Thébault, Julien, Meziane, Tarik, Réjean Tremblay, Dumont, Dany, Bélanger, Simon, Gosselin, Michel, Jolivet, Aurélie, Chauvaud, Laurent, Martel, André L., Rysgaard, Søren, Anne-Hélène Olivier, Pettré, Julien, Mars, Jérôme, Gerber, Silvain, and Archambault, Philippe
- Subjects
13. Climate action ,14. Life underwater - Abstract
Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a ‘sea-ice algae–benthos' to a ‘phytoplankton-zooplankton’ dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the food exported to the seafloor. Bathyal bivalve Astarte moerchi living at 600 m depth in northern Baffin Bay reveals a clear shift in growth variations and Ba/Ca ratios since the late 1970s, which we relate to a change in food availability. Tissue fatty acid compositions show that this species feeds mainly on microalgae exported from the euphotic zone to the seabed. We, therefore, suggest that changes in pelagic-benthic coupling are likely due either to local changes in sea ice dynamics, mediated through bottom-up regulation exerted by sea ice on phytoplankton production, or to a mismatch between phytoplankton bloom and zooplankton grazing due to phenological change. Both possibilities allow a more regular and increased transfer of food to the seabed.This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystems'.
42. Supplementary material Olivier F et al revised 2020.docx from Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya
- Author
-
Olivier, Frédéric, Gaillard, Blandine, Thébault, Julien, Meziane, Tarik, Réjean Tremblay, Dumont, Dany, Bélanger, Simon, Gosselin, Michel, Jolivet, Aurélie, Chauvaud, Laurent, Martel, André L., Rysgaard, Søren, Anne-Hélène Olivier, Pettré, Julien, Mars, Jérôme, Gerber, Silvain, and Archambault, Philippe
- Subjects
13. Climate action ,14. Life underwater - Abstract
Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a ‘sea-ice algae–benthos' to a ‘phytoplankton-zooplankton’ dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the food exported to the seafloor. Bathyal bivalve Astarte moerchi living at 600 m depth in northern Baffin Bay reveals a clear shift in growth variations and Ba/Ca ratios since the late 1970s, which we relate to a change in food availability. Tissue fatty acid compositions show that this species feeds mainly on microalgae exported from the euphotic zone to the seabed. We, therefore, suggest that changes in pelagic-benthic coupling are likely due either to local changes in sea ice dynamics, mediated through bottom-up regulation exerted by sea ice on phytoplankton production, or to a mismatch between phytoplankton bloom and zooplankton grazing due to phenological change. Both possibilities allow a more regular and increased transfer of food to the seabed.This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystems'.
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