Bulletin of the American Physical Society
67th Annual Meeting of the APS Division of Fluid Dynamics
Volume 59, Number 20
Sunday–Tuesday, November 23–25, 2014; San Francisco, California
Session L17: Geophysical Fluid Dynamics: Gravity Currents
3:35 PM–6:11 PM,
Monday, November 24, 2014
Chair: Claudia Cenedese, Woods Hole Oceanographic Institution
Abstract ID: BAPS.2014.DFD.L17.2
Abstract: L17.00002 : Experimental and Numerical Studies of Oceanic Overflow*
3:48 PM–4:01 PM
Preview Abstract Abstract
(University of Georgia)
(San Diego State University)
Oceanic overflows occur when dense water flows down a continental slope into less dense ambient water. The resulting density driven plumes occur naturally in various regions of the global ocean and affect the large-scale circulation. General circulation models currently rely on parameterizations for representing dense overflows due to resolution restrictions. The work presented here involves a direct qualitative and quantitative comparison between physical laboratory experiments and lab-scale numerical simulations. Laboratory experiments are conducted using a rotating square tank customized for idealized overflow and a high-resolution camera mounted on the table in the rotating reference frame for data collection. Corresponding numerical simulations are performed using the MIT general circulation model (MITgcm) run in the non-hydrostatic configuration. Resolution and numerical parameter studies are presented to ensure accuracy of the simulation. Laboratory and computational experiments are compared across a wide range of physical parameters, including Coriolis parameter, inflow density anomaly, and dense inflow volumetric flow rate. The results are analyzed using various calculated metrics, such as the plume velocity.
*Funding for this project is provided by the National Science Foundation.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2014.DFD.L17.2
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