| An Integrated Modeling and Observational Study of Three-Dimensional Upper Ocean Boundary Layer Dynamics and Parameterizations |
26 Apr 2012 |
12 pages |
| Authors:
Craig M Lee; Eric A D'Asaro; Ramsey Harcourt; Luc Rainville; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
 | Existing high resolution regional models typically resolve the mean vertical structure of the upper ocean boundary layer. Physically-based parameterizations of vertical fluxes make it possible to account for subgrid mixing at length scales smaller than the layer depth, but no specialized parameterization is used to represent the dynamics of horizontal mixing below the O(1)km - O(10)km resolution scale. We aim to determine the physical limitations of subgrid parameterization on these ... |
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| Typhoon Impacts and Student Support |
30 Sep 2011 |
8 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| These grants support efforts in the TC10/ITOP (Tropical Cyclone 2010 / Impacts of Typhoons on the Ocean in the Pacific) program. This program, joint between ONR and Taiwanese investigators, studied the ocean response to typhoons in the western Pacific Ocean in 2010. ITOP focused on the following scientific questions: How does the cold wake of a typhoon form and dissipate? Typhoons produce a complex three-dimensional response of the underlying ocean ... |
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| Lateral Mixing |
30 Sep 2011 |
6 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| Existing high resolution regional models typically resolve the mean vertical structure of the upper ocean boundary layer. Physically-based parameterizations of vertical fluxes make it possible to account for subgrid mixing at length scales smaller than the layer depth, but no specialized parameterization is used to represent the dynamics of horizontal mixing below the O(1)km - O(10)km resolution scale. We aim to determine the physical limitations of subgrid parameterization on these ... |
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| Lateral Mixing and AESOP |
30 Sep 2010 |
5 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| Existing high resolution regional models typically resolve the mean vertical structure of the upper ocean boundary layer. Physically-based parameterizations of vertical fluxes make it possible to account for subgrid mixing at length scales smaller than the layer depth, but no specialized parameterization is used to represent the dynamics of horizontal mixing below the O(1)km - O(10)km resolution scale. We aim to determine the physical limitations of subgrid parameterization on these ... |
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| Turbulence Parameterization and Lateral Mixing |
30-Jun-2009 |
16 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| This project funded approximately one month of salary for the PI to prepare for and participate in an ONR workshop in Alaska, planning for the field programs in 2011 and 2012 as part of the ONR Lateral Mixing DRI. Meeting expenses included airfare and per diem. At the meeting, analysis results supported by a previous ONR grant, N00014-94-1-0024 were discussed with ONR Program Managers. |
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| Lagrangian Studies of Lateral Mixing and an Internal Modeling and Observational Study of Three-Dimensional Upper Ocean Boundary Layer Dynamics and Parameterizations |
Jan 2009 |
6 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| Existing high-resolution regional models typically resolve the mean vertical structure of the upper ocean boundary layer. Physically-based parameterizations of vertical fluxes make it possible to account for subgrid mixing at length scales smaller than the layer depth, but no specialized parameterization is used to represent the dynamics of horizontal mixing below the O(1)km - O(10)km resolution scale. We aim to determine the physical limitations of subgrid parameterization on these scales. ... |
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| Autonomous Measurements of Ocean Response to Typhoons and Lagrangian Floats for Typhoon and Mixing Studies |
Jan 2009 |
5 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| These grants support efforts in the TC10/ITOP (Tropical Cyclone 2010 / Impacts of Typhoons on the Ocean in the Pacific) program. This program, joint between ONR and Taiwanese investigators, aims to study the ocean response to typhoons in the western Pacific Ocean. |
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| Lagrangian Observations of Nonlinear Internal Waves and Turbulence Mixing in Luzon Strait and South China Sea and Internal Wave in the Vicinity of the Kuroshio Path |
30-Dec-2008 |
22 pages |
| Authors:
Ren-Chieh Lien; Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| Two related projects were funded sequentially under the same grant number. The first was to conduct an experiment near DongSha Island, using the Lagrangian float, to understand the energy cascade from barotropic tides, internal tides, nonlinear internal waves, to turbulence mixing in the northern South China Sea. Results are reported. The second was to analyze observations of data taken in the vicinity of the Kuroshio path from Luzon Strait to ... |
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| An Integrated Modeling and Observational Study of Three-Dimensional Upper Ocean Boundary Layer Dynamics and Parameterizations |
30 Sep 2008 |
5 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| Existing high resolution regional models typically resolve the mean vertical structure of the upper ocean boundary layer. Physically-based parameterizations of vertical fluxes make it possible to account for subgrid mixing at length scales smaller than the layer depth, but no specialized parameterization is used to represent the dynamics of horizontal mixing below the O(1)km - O(10)km resolution scale. |
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| An Integrated Modeling and Observational Study of Three-Dimensional Upper Ocean Boundary Layer Dynamics and Parameterizations |
30 Sep 2008 |
10 pages |
| Authors:
Craig M Lee; Eric A D'Asaro; Ramsey Harcourt; Luc Rainville; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| Existing high resolution regional models typically resolve the mean vertical structure of the upper ocean boundary layer. Physically-based parameterizations of vertical fluxes make it possible to account for subgrid mixing at length scales smaller than the layer depth, but no specialized parameterization is used to represent the dynamics of horizontal mixing below the O(1)km - O(10)km resolution scale. We aim to determine the physical limitations of subgrid parameterization on these ... |
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| Lateral Mixing |
30 Sep 2008 |
3 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| The major research goal for 2008 was to publish an analysis of the relative importance of diapycnal and isopycnal mixing on the Oregon Shelf and study the role of internal waves in this environment. |
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| Lagrangian Floats for CBLAST |
30 Sep 2008 |
5 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| Objectives: To measure turbulence properties and fluxes in the ocean boundary layer beneath hurricanes and relate them to hurricane properties and fluxes measured by others. To model the measured boundary layer properties using Large Eddy Simulation (LES) techniques with the twin goals of testing the models and investigating the boundary layer physics using the models. |
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| Lagrangian Floats for Deep Convection |
Jan 1998 |
3 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| I aim to understand the process of deep convection in the ocean. Near surface water is mixed to great depth at a few high latitude locations, thereby forming the deep and bottom masses of the ocean. This proposal has supported the development and deployment of neutrally buoyant floats in the Labrador Sea in the winters of 1997 and 1998 and the analysis of the resulting data. These floats provide detailed ... |
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| Coastal Mixing |
Jan 1998 |
4 pages |
| Authors:
Eric A D'Asaro; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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| The long-term goal of this research is to understand the mechanisms of turbulence and mixing in shallow water sufficiently well to be able to specify useful parameterizations for coastal circulation models. I believe that this goal can best be achieved through a combination of comprehensive measurement of the turbulent fluctuations and the larger scale flows that drive them, and modeling. These turbulent flows are often complex and rapidly changing and ... |
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