The intrinsic variability of the Indonesian Throughflow
The Indonesian Throughflow (ITF) carries an annual average of about 15 Sv of water from the Pacific through the Indonesian Seas Into the Indian Ocean, and its year-to-year variation ranges from 1 to 4 Sv. A 10-member ensemble of 41-year integrations of a semi-global eddy-resolving oceanic general ci...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-06-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1117304/full |
| _version_ | 1797792288202555392 |
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| author | Ryo Furue Masami Nonaka Hideharu Sasaki |
| author_facet | Ryo Furue Masami Nonaka Hideharu Sasaki |
| author_sort | Ryo Furue |
| collection | DOAJ |
| description | The Indonesian Throughflow (ITF) carries an annual average of about 15 Sv of water from the Pacific through the Indonesian Seas Into the Indian Ocean, and its year-to-year variation ranges from 1 to 4 Sv. A 10-member ensemble of 41-year integrations of a semi-global eddy-resolving oceanic general circulation model is examined to explore the intrinsic (chaotic) variability of the ITF transport and associated flow. It is found that the annual-mean ITF transport is different by about 1 Sv between the ensemble members at several years. The characteristic vertical and horizontal structures of the ensemble anomaly (deviation from the ensemble average) are described. These structures and the basin-scale spread of the anomaly suggest that the intrinsic variability of the ITF is a genuine increase or decrease of the classical ITF rather than variability due to local eddies or nonlinear currents within the Indonesian Seas. The lagged correlation of the intrinsic component of the ITF transport with sea-surface height and barotropic streamfunction suggests that the intrinsic variability may come from zonal jets in the western subtropical North Pacific. |
| first_indexed | 2024-03-13T02:32:06Z |
| format | Article |
| id | doaj.art-514d109a5620425eb6303277a249addc |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-03-13T02:32:06Z |
| publishDate | 2023-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-514d109a5620425eb6303277a249addc2023-06-29T13:48:41ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-06-011010.3389/fmars.2023.11173041117304The intrinsic variability of the Indonesian ThroughflowRyo FurueMasami NonakaHideharu SasakiThe Indonesian Throughflow (ITF) carries an annual average of about 15 Sv of water from the Pacific through the Indonesian Seas Into the Indian Ocean, and its year-to-year variation ranges from 1 to 4 Sv. A 10-member ensemble of 41-year integrations of a semi-global eddy-resolving oceanic general circulation model is examined to explore the intrinsic (chaotic) variability of the ITF transport and associated flow. It is found that the annual-mean ITF transport is different by about 1 Sv between the ensemble members at several years. The characteristic vertical and horizontal structures of the ensemble anomaly (deviation from the ensemble average) are described. These structures and the basin-scale spread of the anomaly suggest that the intrinsic variability of the ITF is a genuine increase or decrease of the classical ITF rather than variability due to local eddies or nonlinear currents within the Indonesian Seas. The lagged correlation of the intrinsic component of the ITF transport with sea-surface height and barotropic streamfunction suggests that the intrinsic variability may come from zonal jets in the western subtropical North Pacific.https://www.frontiersin.org/articles/10.3389/fmars.2023.1117304/fullchaosIndonesian Throughflow (ITF)eddy-resolving ocean general circulation modelinterannual variabilitybarotropic transportintrinsic variability |
| spellingShingle | Ryo Furue Masami Nonaka Hideharu Sasaki The intrinsic variability of the Indonesian Throughflow Frontiers in Marine Science chaos Indonesian Throughflow (ITF) eddy-resolving ocean general circulation model interannual variability barotropic transport intrinsic variability |
| title | The intrinsic variability of the Indonesian Throughflow |
| title_full | The intrinsic variability of the Indonesian Throughflow |
| title_fullStr | The intrinsic variability of the Indonesian Throughflow |
| title_full_unstemmed | The intrinsic variability of the Indonesian Throughflow |
| title_short | The intrinsic variability of the Indonesian Throughflow |
| title_sort | intrinsic variability of the indonesian throughflow |
| topic | chaos Indonesian Throughflow (ITF) eddy-resolving ocean general circulation model interannual variability barotropic transport intrinsic variability |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1117304/full |
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