Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flows
Abstract Several ocean Western Boundary Currents (WBCs) encounter a lateral gap along their path. Examples are the Kuroshio Current penetrating into the South China Sea through the Luzon Strait and the Gulf of Mexico Loop Current leaping from the Yucatan peninsula to Florida as part of the Gulf Stre...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-01-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-05094-1 |
| _version_ | 1819281476734156800 |
|---|---|
| author | Stefano Pierini Paola de Ruggiero Maria Eletta Negretti Ilana Schiller-Weiss Julia Weiffenbach Samuel Viboud Thomas Valran Henk A. Dijkstra Joël Sommeria |
| author_facet | Stefano Pierini Paola de Ruggiero Maria Eletta Negretti Ilana Schiller-Weiss Julia Weiffenbach Samuel Viboud Thomas Valran Henk A. Dijkstra Joël Sommeria |
| author_sort | Stefano Pierini |
| collection | DOAJ |
| description | Abstract Several ocean Western Boundary Currents (WBCs) encounter a lateral gap along their path. Examples are the Kuroshio Current penetrating into the South China Sea through the Luzon Strait and the Gulf of Mexico Loop Current leaping from the Yucatan peninsula to Florida as part of the Gulf Stream system. Here, we present results on WBC relevant flows, generated in the world’s largest rotating platform, where the Earth’s sphericity necessary to support WBCs is realized by an equivalent topographic effect. The fluid is put in motion by a pump system, which produces a current that is stationary far from the gap. When the jet reaches the gap entrance, time-dependent patterns with complex spatial structures appear, with the jet leaking, leaping or looping through the gap. The occurrence of these intrinsic self-sustained periodic or aperiodic oscillations depending on current intensity is well known in nonlinear dynamical systems theory and occurs in many real systems. It has been observed here for the first time in real rotating fluid flows and is thought to be highly relevant to explain low-frequency variability in ocean WBCs. |
| first_indexed | 2024-12-24T01:00:18Z |
| format | Article |
| id | doaj.art-a50fccf4047e405cbbe77439ea601821 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-24T01:00:18Z |
| publishDate | 2022-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-a50fccf4047e405cbbe77439ea6018212022-12-21T17:23:24ZengNature PortfolioScientific Reports2045-23222022-01-0112111110.1038/s41598-022-05094-1Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flowsStefano Pierini0Paola de Ruggiero1Maria Eletta Negretti2Ilana Schiller-Weiss3Julia Weiffenbach4Samuel Viboud5Thomas Valran6Henk A. Dijkstra7Joël Sommeria8Department of Science and Technology, Parthenope University of NaplesDepartment of Science and Technology, Parthenope University of NaplesCNRS, Grenoble INP, LEGI, Univ. Grenoble AlpesGEOMAR Helmholtz Centre for Ocean ResearchDepartment of Physics, Utrecht UniversityCNRS, Grenoble INP, LEGI, Univ. Grenoble AlpesCNRS, Grenoble INP, LEGI, Univ. Grenoble AlpesDepartment of Physics, Utrecht UniversityCNRS, Grenoble INP, LEGI, Univ. Grenoble AlpesAbstract Several ocean Western Boundary Currents (WBCs) encounter a lateral gap along their path. Examples are the Kuroshio Current penetrating into the South China Sea through the Luzon Strait and the Gulf of Mexico Loop Current leaping from the Yucatan peninsula to Florida as part of the Gulf Stream system. Here, we present results on WBC relevant flows, generated in the world’s largest rotating platform, where the Earth’s sphericity necessary to support WBCs is realized by an equivalent topographic effect. The fluid is put in motion by a pump system, which produces a current that is stationary far from the gap. When the jet reaches the gap entrance, time-dependent patterns with complex spatial structures appear, with the jet leaking, leaping or looping through the gap. The occurrence of these intrinsic self-sustained periodic or aperiodic oscillations depending on current intensity is well known in nonlinear dynamical systems theory and occurs in many real systems. It has been observed here for the first time in real rotating fluid flows and is thought to be highly relevant to explain low-frequency variability in ocean WBCs.https://doi.org/10.1038/s41598-022-05094-1 |
| spellingShingle | Stefano Pierini Paola de Ruggiero Maria Eletta Negretti Ilana Schiller-Weiss Julia Weiffenbach Samuel Viboud Thomas Valran Henk A. Dijkstra Joël Sommeria Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flows Scientific Reports |
| title | Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flows |
| title_full | Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flows |
| title_fullStr | Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flows |
| title_full_unstemmed | Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flows |
| title_short | Laboratory experiments reveal intrinsic self-sustained oscillations in ocean relevant rotating fluid flows |
| title_sort | laboratory experiments reveal intrinsic self sustained oscillations in ocean relevant rotating fluid flows |
| url | https://doi.org/10.1038/s41598-022-05094-1 |
| work_keys_str_mv | AT stefanopierini laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT paoladeruggiero laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT mariaelettanegretti laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT ilanaschillerweiss laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT juliaweiffenbach laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT samuelviboud laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT thomasvalran laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT henkadijkstra laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows AT joelsommeria laboratoryexperimentsrevealintrinsicselfsustainedoscillationsinoceanrelevantrotatingfluidflows |