In this article we present the results of the laboratory experiments with shift currents in the homogenous shallow water generated by differentially rotating elements of the vessel bottom: central axisymmetric disk and outer coupled rings. Based on the experimental results, we explain the generation of vortex rings due to the development of barothropic or shift instability of currents. We show that the surface of the differentially rotating liquid in the horizontal rate shift zone creates the conditions for generating chains of vortices rotating clockwise. When changing the values of rate shift and the rotation rate of the whole system, the formation of modes of instability of vortex structures is observed, the conditions for which were quantified on the laboratory current stability diagram in Rossby and Ekman numbers. To interpret the experimental data we considered the solutions of the equations for quasi-two-dimensional geophysical currents in the form of elementary waves of the current function disturbance. We estimated the parameters of the perturbations development at the meanders of the different parts of Gulf Stream using the calculation of the increment of experimental curves for neutral stability. The evaluation results provide a basis for the development of realistic approaches to understanding the processes of generation and evolution of synoptic vortices in the meanders of intense oceanic jet currents.
Published in | Hydrology (Volume 5, Issue 5) |
DOI | 10.11648/j.hyd.20170505.13 |
Page(s) | 77-81 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
Copyright |
Copyright © The Author(s), 2017. Published by Science Publishing Group |
Jet Currents in the Ocean, Barotropic Instability, Modeling of Currents, Laboratory Experiment
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APA Style
Alexander Alekseyevich Solovyev, Dmitry Alexandrovich Solovyev. (2017). The Barotropic Instability of the Oceanic Jet Currents. Hydrology, 5(5), 77-81. https://doi.org/10.11648/j.hyd.20170505.13
ACS Style
Alexander Alekseyevich Solovyev; Dmitry Alexandrovich Solovyev. The Barotropic Instability of the Oceanic Jet Currents. Hydrology. 2017, 5(5), 77-81. doi: 10.11648/j.hyd.20170505.13
AMA Style
Alexander Alekseyevich Solovyev, Dmitry Alexandrovich Solovyev. The Barotropic Instability of the Oceanic Jet Currents. Hydrology. 2017;5(5):77-81. doi: 10.11648/j.hyd.20170505.13
@article{10.11648/j.hyd.20170505.13, author = {Alexander Alekseyevich Solovyev and Dmitry Alexandrovich Solovyev}, title = {The Barotropic Instability of the Oceanic Jet Currents}, journal = {Hydrology}, volume = {5}, number = {5}, pages = {77-81}, doi = {10.11648/j.hyd.20170505.13}, url = {https://doi.org/10.11648/j.hyd.20170505.13}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.hyd.20170505.13}, abstract = {In this article we present the results of the laboratory experiments with shift currents in the homogenous shallow water generated by differentially rotating elements of the vessel bottom: central axisymmetric disk and outer coupled rings. Based on the experimental results, we explain the generation of vortex rings due to the development of barothropic or shift instability of currents. We show that the surface of the differentially rotating liquid in the horizontal rate shift zone creates the conditions for generating chains of vortices rotating clockwise. When changing the values of rate shift and the rotation rate of the whole system, the formation of modes of instability of vortex structures is observed, the conditions for which were quantified on the laboratory current stability diagram in Rossby and Ekman numbers. To interpret the experimental data we considered the solutions of the equations for quasi-two-dimensional geophysical currents in the form of elementary waves of the current function disturbance. We estimated the parameters of the perturbations development at the meanders of the different parts of Gulf Stream using the calculation of the increment of experimental curves for neutral stability. The evaluation results provide a basis for the development of realistic approaches to understanding the processes of generation and evolution of synoptic vortices in the meanders of intense oceanic jet currents.}, year = {2017} }
TY - JOUR T1 - The Barotropic Instability of the Oceanic Jet Currents AU - Alexander Alekseyevich Solovyev AU - Dmitry Alexandrovich Solovyev Y1 - 2017/11/01 PY - 2017 N1 - https://doi.org/10.11648/j.hyd.20170505.13 DO - 10.11648/j.hyd.20170505.13 T2 - Hydrology JF - Hydrology JO - Hydrology SP - 77 EP - 81 PB - Science Publishing Group SN - 2330-7617 UR - https://doi.org/10.11648/j.hyd.20170505.13 AB - In this article we present the results of the laboratory experiments with shift currents in the homogenous shallow water generated by differentially rotating elements of the vessel bottom: central axisymmetric disk and outer coupled rings. Based on the experimental results, we explain the generation of vortex rings due to the development of barothropic or shift instability of currents. We show that the surface of the differentially rotating liquid in the horizontal rate shift zone creates the conditions for generating chains of vortices rotating clockwise. When changing the values of rate shift and the rotation rate of the whole system, the formation of modes of instability of vortex structures is observed, the conditions for which were quantified on the laboratory current stability diagram in Rossby and Ekman numbers. To interpret the experimental data we considered the solutions of the equations for quasi-two-dimensional geophysical currents in the form of elementary waves of the current function disturbance. We estimated the parameters of the perturbations development at the meanders of the different parts of Gulf Stream using the calculation of the increment of experimental curves for neutral stability. The evaluation results provide a basis for the development of realistic approaches to understanding the processes of generation and evolution of synoptic vortices in the meanders of intense oceanic jet currents. VL - 5 IS - 5 ER -