Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic
Abstract The energy budget of the internal tide and its life cycle is investigated with a high resolution numerical simulation and a vertical normal mode decomposition. Two areas of interest are considered: the Azores Islands over the mid Atlantic ridge and the Gulf Stream offshore the North of the...
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2023
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crspringernat:10.1007/978-3-031-40094-0_1 2024-03-10T08:36:16+00:00 Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic Bella, Adrien Lahaye, Noé Tissot, Gilles 2023 http://dx.doi.org/10.1007/978-3-031-40094-0_1 https://link.springer.com/content/pdf/10.1007/978-3-031-40094-0_1 unknown Springer Nature Switzerland https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 Mathematics of Planet Earth Stochastic Transport in Upper Ocean Dynamics II page 1-16 ISSN 2524-4264 2524-4272 ISBN 9783031400933 9783031400940 book-chapter 2023 crspringernat https://doi.org/10.1007/978-3-031-40094-0_1 2024-02-13T14:32:32Z Abstract The energy budget of the internal tide and its life cycle is investigated with a high resolution numerical simulation and a vertical normal mode decomposition. Two areas of interest are considered: the Azores Islands over the mid Atlantic ridge and the Gulf Stream offshore the North of the US East coast shelf break. Low mode (1 and 2) internal tides are found to propagate from 100 km (mode 2) to 1000 km (mode 1) away from their generation sites. Waves loose a significant portion of their energy as they propagate through the Gulf Stream, in contrast to the Azores domain. In the Gulf Stream domain, the mesoscale circulation is responsible for energy transfers from low to high modes internal tides, while the topographic scattering is dominant in the Azores area. This transfer of energy toward high modes favours energy dissipation. The mesoscale is significant in the energy budget of modes higher than mode 1 for both domains, and for all baroclinic modes in the Gulf Stream area. The internal tide is found to extract or loose energy toward the mesoscale circulation, but this accounts for less than 14%, of the energy scattered from low internal tide modes to higher ones once summed over all contributions of the modal energy budget. Book Part North Atlantic Springer Nature Mid-Atlantic Ridge 1 16 |
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Abstract The energy budget of the internal tide and its life cycle is investigated with a high resolution numerical simulation and a vertical normal mode decomposition. Two areas of interest are considered: the Azores Islands over the mid Atlantic ridge and the Gulf Stream offshore the North of the US East coast shelf break. Low mode (1 and 2) internal tides are found to propagate from 100 km (mode 2) to 1000 km (mode 1) away from their generation sites. Waves loose a significant portion of their energy as they propagate through the Gulf Stream, in contrast to the Azores domain. In the Gulf Stream domain, the mesoscale circulation is responsible for energy transfers from low to high modes internal tides, while the topographic scattering is dominant in the Azores area. This transfer of energy toward high modes favours energy dissipation. The mesoscale is significant in the energy budget of modes higher than mode 1 for both domains, and for all baroclinic modes in the Gulf Stream area. The internal tide is found to extract or loose energy toward the mesoscale circulation, but this accounts for less than 14%, of the energy scattered from low internal tide modes to higher ones once summed over all contributions of the modal energy budget. |
format |
Book Part |
author |
Bella, Adrien Lahaye, Noé Tissot, Gilles |
spellingShingle |
Bella, Adrien Lahaye, Noé Tissot, Gilles Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic |
author_facet |
Bella, Adrien Lahaye, Noé Tissot, Gilles |
author_sort |
Bella, Adrien |
title |
Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic |
title_short |
Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic |
title_full |
Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic |
title_fullStr |
Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic |
title_full_unstemmed |
Internal Tides Energy Transfers and Interactions with the Mesoscale Circulation in Two Contrasted Areas of the North Atlantic |
title_sort |
internal tides energy transfers and interactions with the mesoscale circulation in two contrasted areas of the north atlantic |
publisher |
Springer Nature Switzerland |
publishDate |
2023 |
url |
http://dx.doi.org/10.1007/978-3-031-40094-0_1 https://link.springer.com/content/pdf/10.1007/978-3-031-40094-0_1 |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Mathematics of Planet Earth Stochastic Transport in Upper Ocean Dynamics II page 1-16 ISSN 2524-4264 2524-4272 ISBN 9783031400933 9783031400940 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1007/978-3-031-40094-0_1 |
container_start_page |
1 |
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16 |
_version_ |
1793132896082460672 |