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Self-similarity of the meddy family in the Eastern North-Atlantic.
Shapiro, Georgiy I., Zenk, Walter, Meschanov, Sergey L. and Schulzt Tokos, Kathy L. (1995) Self-similarity of the meddy family in the Eastern North-Atlantic. Oceanologica Acta, 18 (1). pp. 29-42.
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Abstract
In this study we analyze two groups of Mediterranean salt lenses: ''mid-life'' lenses, typically 1-2 years old, observed in the Canary Basin, and younger Meddies from the Iberian Basin. In contrast to turbulent features, vortex lenses have a clear coherent structure in the temperature and salinity fields. This physical property supports the hypothesis that a mathematical description with only a few degrees of freedom may exist. We use nonlinear transformation of variables to find a unique function describing vertical profiles at different locations inside the lens. When this function is found, its existence is considered as ''self-similarity'' of the lens structure. We also found a common function that describes each group of Meddy, Canary and Iberian, and noted a remarkable difference between the groups. A possible reason for this result might lie in the difference in lens age. Iberian lenses are in a more juvenile state and may go through adjustment transformations before turning into more stable mid-life vortices. The developed parameterization is used to calculate radii and integral heat and salt contents of Meddles.
Document Type: | Article |
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Keywords: | Meddies, Eastern North-Atlantic |
Research affiliation: | OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography |
Refereed: | Yes |
Open Access Journal?: | No |
Publisher: | Gauthier-Villars |
Projects: | SFB133 |
Date Deposited: | 04 Apr 2016 08:20 |
Last Modified: | 01 Feb 2017 14:38 |
URI: | https://oceanrep.geomar.de/id/eprint/31941 |
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