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Idalia Machuca, University of British Columbia, Vancouver, Canada
Dr. Susan Allen, University of British Columbia, Vancouver, Canada
Numerical Simulation Exploring the Mechanisms Driving Upwelling in Mackenzie Canyon, Beaufort Sea

Submarine canyons support thriving ecosystems by enabling the exchange of nutrients between the deep ocean and the continental shelf. In regions of low nutrient supply, such as the Arctic Ocean, canyons play a significant role in the regulation of primary productivity by enhancing upwelling in the region. Analytical and laboratory studies of the flow dynamics in idealized canyons indicate that upwelling is driven by three mechanisms: the time-dependent response of flow to an initial forcing, the advective response, and the convergence of isobaths along the canyon walls. These mechanisms coexist in Mackenzie Canyon, which is located on the southeastern edge of the Beaufort Sea in the Arctic Ocean. The three mechanisms are reviewed, and their implications for the circulation around Mackenzie Canyon are explained. Furthermore, a description of the regional configuration of the NEMO (Nucleus for European Modelling of the Ocean) model that will be used to test their relative strengths will be provided, along with a preliminary evaluation of the model using observational data collected in the region.

Theme 1: Canyon processes in the space-time continuum (formation, evolution, circulation)
Poster Presentation
upwelling, circulation, numerical, model, Arctic