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Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea
Under the emerging features of interannual-to-decadal ocean variability, the periodical reversals of the North Ionian Gyre (NIG), driven mostly by the mechanism named Adriatic-Ionian Bimodal Oscillating System (BiOS), are known as impacting on marine physics and biogeochemistry and potentially influ...
Autores principales: | , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7002567/ https://www.ncbi.nlm.nih.gov/pubmed/32024877 http://dx.doi.org/10.1038/s41598-020-57862-6 |
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author | Rubino, Angelo Gačić, Miroslav Bensi, Manuel Kovačević, Vedrana Malačič, Vlado Menna, Milena Negretti, Maria Eletta Sommeria, Joël Zanchettin, Davide Barreto, Ricardo V. Ursella, Laura Cardin, Vanessa Civitarese, Giuseppe Orlić, Mirko Petelin, Boris Siena, Giuseppe |
author_facet | Rubino, Angelo Gačić, Miroslav Bensi, Manuel Kovačević, Vedrana Malačič, Vlado Menna, Milena Negretti, Maria Eletta Sommeria, Joël Zanchettin, Davide Barreto, Ricardo V. Ursella, Laura Cardin, Vanessa Civitarese, Giuseppe Orlić, Mirko Petelin, Boris Siena, Giuseppe |
author_sort | Rubino, Angelo |
collection | PubMed |
description | Under the emerging features of interannual-to-decadal ocean variability, the periodical reversals of the North Ionian Gyre (NIG), driven mostly by the mechanism named Adriatic-Ionian Bimodal Oscillating System (BiOS), are known as impacting on marine physics and biogeochemistry and potentially influencing short-term regional climate predictability in the Eastern Mediterranean. Whilst it has been suggested that local wind forcing cannot explain such variability, aspects of the alternative hypothesis indicating that NIG reversals mainly arises from an internal ocean feedback mechanism alone remain largely debated. Here we demonstrate, using the results of physical experiments, performed in the world’s largest rotating tank and numerical simulations, that the main observed feature of BiOS, i.e., the switch of polarity of the near-surface circulation in the NIG, can be induced by a mere injection of dense water on a sloping bottom. Hence, BiOS is a truly oceanic mode of variability and abrupt polarity changes in circulation can arise solely from extreme dense water formation events. |
format | Online Article Text |
id | pubmed-7002567 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-70025672020-02-14 Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea Rubino, Angelo Gačić, Miroslav Bensi, Manuel Kovačević, Vedrana Malačič, Vlado Menna, Milena Negretti, Maria Eletta Sommeria, Joël Zanchettin, Davide Barreto, Ricardo V. Ursella, Laura Cardin, Vanessa Civitarese, Giuseppe Orlić, Mirko Petelin, Boris Siena, Giuseppe Sci Rep Article Under the emerging features of interannual-to-decadal ocean variability, the periodical reversals of the North Ionian Gyre (NIG), driven mostly by the mechanism named Adriatic-Ionian Bimodal Oscillating System (BiOS), are known as impacting on marine physics and biogeochemistry and potentially influencing short-term regional climate predictability in the Eastern Mediterranean. Whilst it has been suggested that local wind forcing cannot explain such variability, aspects of the alternative hypothesis indicating that NIG reversals mainly arises from an internal ocean feedback mechanism alone remain largely debated. Here we demonstrate, using the results of physical experiments, performed in the world’s largest rotating tank and numerical simulations, that the main observed feature of BiOS, i.e., the switch of polarity of the near-surface circulation in the NIG, can be induced by a mere injection of dense water on a sloping bottom. Hence, BiOS is a truly oceanic mode of variability and abrupt polarity changes in circulation can arise solely from extreme dense water formation events. Nature Publishing Group UK 2020-02-05 /pmc/articles/PMC7002567/ /pubmed/32024877 http://dx.doi.org/10.1038/s41598-020-57862-6 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Rubino, Angelo Gačić, Miroslav Bensi, Manuel Kovačević, Vedrana Malačič, Vlado Menna, Milena Negretti, Maria Eletta Sommeria, Joël Zanchettin, Davide Barreto, Ricardo V. Ursella, Laura Cardin, Vanessa Civitarese, Giuseppe Orlić, Mirko Petelin, Boris Siena, Giuseppe Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea |
title | Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea |
title_full | Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea |
title_fullStr | Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea |
title_full_unstemmed | Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea |
title_short | Experimental evidence of long-term oceanic circulation reversals without wind influence in the North Ionian Sea |
title_sort | experimental evidence of long-term oceanic circulation reversals without wind influence in the north ionian sea |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7002567/ https://www.ncbi.nlm.nih.gov/pubmed/32024877 http://dx.doi.org/10.1038/s41598-020-57862-6 |
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