A method for preserving nominally-resolved flow patterns in low-resolution ocean simulations: Constrained dynamics
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Published version
Author(s)
Shevchenko, I
Berloff, P
Type
Journal Article
Abstract
Inability of low-resolution ocean models to simulate many important aspects of the large-scale general circulation is a common problem. In the view of physics, the main reason for this failure are the missed dynamical effects of the unresolved small scales of motion on the explicitly resolved large-scale circulation. Complimentary to this mainstream physics-based perspective, we propose to address this failure from the dynamical systems point of view, namely, as the persistent tendency of phase space trajectories representing the low-resolution solution to escape the right region of the corresponding phase space, which is occupied by the reference eddy-resolving solution. Based on this concept, we propose to use methods of constrained optimization to confine the low-resolution solution to remain within the correct phase space region, without attempting to amend the eddy physics by introducing a process-based parameterization. This approach is advocated as a novel framework for data-driven hyper-parameterizations of mesoscale oceanic eddies in non-eddy-resolving models. We tested the idea in the context of classical, baroclinic beta-plane turbulence model and showed that non-eddy-resolving solution can be substantially improved towards the reference eddy-resolving benchmark.
Date Issued
2022-10
Date Acceptance
2022-08-16
Citation
Ocean Modelling, 2022, 178, pp.1-6
ISSN
1463-5003
Publisher
Elsevier BV
Start Page
1
End Page
6
Journal / Book Title
Ocean Modelling
Volume
178
Copyright Statement
© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/)
(http://creativecommons.org/licenses/by/4.0/)
License URL
Sponsor
The Leverhulme Trust
Identifier
https://www.sciencedirect.com/science/article/pii/S1463500322001135?via%3Dihub
Grant Number
RPG-2019-024
Subjects
0405 Oceanography
0911 Maritime Engineering
Oceanography
Publication Status
Published
Article Number
102098
Date Publish Online
2022-08-22