Johnson, Edward;
Crowe, Matthew;
(2023)
Oceanic dipoles in a surface quasigeostrophic model.
Journal of Fluid Mechanics
, 958
, Article R2. 10.1017/jfm.2023.87.
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Abstract
Analysis of satellite altimetry and Argo float data leads Ni et al. (J. Geophys. Res., 125, 2020, e2020JC016479) to argue that mesoscale dipoles are widespread features of the global ocean having a relatively uniform three-structure that can lead to strong vertical exchanges. Almost all the features of the composite dipole they construct can be derived from a model for multipoles in the surface quasi-geostrophic equations for which we present a straightforward novel solution in terms of an explicit linear algebraic eigenvalue problem, allowing simple evaluation of the higher radial modes that appear to be present in the observations and suggesting that mass conservation may explain the observed frontogenetic velocities.
| Type: | Article |
|---|---|
| Title: | Oceanic dipoles in a surface quasigeostrophic model |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1017/jfm.2023.87 |
| Publisher version: | https://doi.org/10.1017/jfm.2023.87 |
| Language: | English |
| Additional information: | Copyright © The Author(s), 2023. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited. |
| Keywords: | quasi-geostrophic flows, stratified flows, vortex dynamics |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10163826 |
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