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- W4322005087 abstract "Oceanic flow comprises of a fast and a slow evolving component. Decomposing the flow field into these components is necessary to understand processes like mesoscale eddy dissipation and spontaneous wave emission. These processes are potentially important wave sources and lead to an energy transfer between the slow and the fast component. The first order approach is to decompose in geostrophic and non-geostrophic components. Since a part of the non-geostrophic component evolves slowly due to nonlinear interactions between both component, this approach is not precise enough to quantify energy transfers. To obtain higher accuracy in decomposing the flow field, more precise methods are required, such as optimal balance or nonlinear normal mode decomposition. However, their application is limited to idealized model settings that neither include topography nor a varying Coriolis parameter. Here, we modified the optimal balance method with a time averaging procedure, such that it is applicable in more realistic ocean models. We compared the new modified method with existing methods in a shallow water model and in a non-hydrostatic model. For longer time averaging periods, the modified optimal balance method converges against the original method." @default.
- W4322005087 created "2023-02-26" @default.
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- W4322005087 date "2023-05-15" @default.
- W4322005087 modified "2023-10-18" @default.
- W4322005087 title "On flow decomposition in realistic ocean models" @default.
- W4322005087 doi "https://doi.org/10.5194/egusphere-egu23-8133" @default.
- W4322005087 hasPublicationYear "2023" @default.
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