Ocean dynamics and numerical modeling of canyons and shelfbreaks
Author(s)Haley, Patrick; Mirabito, Chris; Duda, Timothy; Gawarkiewicz, Glen; Lermusiaux, Pierre F. J.
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Multiscale ocean dynamics and multi-resolution numerical modeling of canyons and shelfbreaks are outlined. The dynamics focus is on fronts, currents, tides, and internal tides/waves that occur in these regions. Due to the topographic gradients and strong internal field gradients, nonlinear terms and non-hydrostatic dynamics can be significant. Computationally, a challenge is to achieve accurate simulations that resolve strong gradients over dynamically significant space- and time-scales. To do so, one component are high-order schemes that are more accurate for the same efficiency than lower-order schemes. A second is multi-resolution grids that allow optimized refinements, such as reducing errors near steep topography. A third are methods that allow to solve for multiple dynamics, e.g., hydrostatic and non-hydrostatic, seamlessly. To address these components, new hybridizable discontinuous Galerkin (HDG) finite-element schemes for (non)-hydrostatic physics including a nonlinear free-surface are introduced. The results of data-assimilative multi-resolution simulations are then discussed, using the primitive-equation MSEAS system and telescoping implicitly two-way nested domains. They correspond to collaborative experiments: (i) Shallow Water 06 (SW06) and the Integrated Ocean Dynamics and Acoustics (IODA) research in the Middle Atlantic Bight region; (ii) Quantifying, Predicting and Exploiting Uncertainty (QPE) in the Taiwan-Kuroshio region; and (iii) Philippines Straits Dynamics Experiment (PhilEx).
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
The Journal of the Acoustical Society of America
Acoustical Society of America (ASA)
Lermusiaux, Pierre F., Patrick Haley, Chris Mirabito, Timothy Duda, and Glen Gawarkiewicz. “Ocean Dynamics and Numerical Modeling of Canyons and Shelfbreaks.” J. Acoust. Soc. Am. 136, no. 4 (October 2014): 2316–2316.