A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning
Southern Ocean circulation can be viewed as a supergyre-"several inter-connected, leaky sub-gyres-"as opposed to isolated gyres in the Weddell and Ross Seas, according to new analysis using machine learning techniques The Southern Ocean closes the global overturning circulation and is key...
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ftird:oai:ird.fr:fdi:010087720 2024-09-15T17:46:36+00:00 A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning Sonnewald, M. Reeve, K. A. /Lguensat, Redouane OCEAN AUSTRAL 2023 https://www.documentation.ird.fr/hor/fdi:010087720 EN eng https://www.documentation.ird.fr/hor/fdi:010087720 oai:ird.fr:fdi:010087720 Sonnewald M., Reeve K. A., Lguensat Redouane. A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning. 2023, 4 (1), p. 153 [20 p.] text 2023 ftird 2024-08-15T05:57:40Z Southern Ocean circulation can be viewed as a supergyre-"several inter-connected, leaky sub-gyres-"as opposed to isolated gyres in the Weddell and Ross Seas, according to new analysis using machine learning techniques The Southern Ocean closes the global overturning circulation and is key to the regulation of carbon, heat, biological production, and sea level. However, the dynamics of the general circulation and upwelling pathways remain poorly understood. Here, a physics-informed unsupervised machine learning framework using principled constraints is used. A unifying framework is proposed invoking a semi-circumpolar supergyre south of the Antarctic circumpolar current: a massive series of leaking sub-gyres spanning the Weddell and Ross seas that are connected and maintained via rough topography that acts as scaffolding. The supergyre framework challenges the conventional view of having separate circulation structures in the Weddell and Ross seas and suggests that idealized models and zonally-averaged frameworks may be of limited utility for climate applications. Machine learning was used to reveal areas of coherent driving forces within a vorticity-based analysis. Predictions from the supergyre framework are supported by available observations and could aid observational and modelling efforts to study this climatologically key region undergoing rapid change. Text Antarc* Antarctic Southern Ocean IRD (Institute de recherche pour le développement): Horizon |
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Open Polar |
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IRD (Institute de recherche pour le développement): Horizon |
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English |
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Southern Ocean circulation can be viewed as a supergyre-"several inter-connected, leaky sub-gyres-"as opposed to isolated gyres in the Weddell and Ross Seas, according to new analysis using machine learning techniques The Southern Ocean closes the global overturning circulation and is key to the regulation of carbon, heat, biological production, and sea level. However, the dynamics of the general circulation and upwelling pathways remain poorly understood. Here, a physics-informed unsupervised machine learning framework using principled constraints is used. A unifying framework is proposed invoking a semi-circumpolar supergyre south of the Antarctic circumpolar current: a massive series of leaking sub-gyres spanning the Weddell and Ross seas that are connected and maintained via rough topography that acts as scaffolding. The supergyre framework challenges the conventional view of having separate circulation structures in the Weddell and Ross seas and suggests that idealized models and zonally-averaged frameworks may be of limited utility for climate applications. Machine learning was used to reveal areas of coherent driving forces within a vorticity-based analysis. Predictions from the supergyre framework are supported by available observations and could aid observational and modelling efforts to study this climatologically key region undergoing rapid change. |
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Text |
author |
Sonnewald, M. Reeve, K. A. /Lguensat, Redouane |
spellingShingle |
Sonnewald, M. Reeve, K. A. /Lguensat, Redouane A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning |
author_facet |
Sonnewald, M. Reeve, K. A. /Lguensat, Redouane |
author_sort |
Sonnewald, M. |
title |
A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning |
title_short |
A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning |
title_full |
A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning |
title_fullStr |
A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning |
title_full_unstemmed |
A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning |
title_sort |
southern ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning |
publishDate |
2023 |
url |
https://www.documentation.ird.fr/hor/fdi:010087720 |
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OCEAN AUSTRAL |
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Antarc* Antarctic Southern Ocean |
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Antarc* Antarctic Southern Ocean |
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https://www.documentation.ird.fr/hor/fdi:010087720 oai:ird.fr:fdi:010087720 Sonnewald M., Reeve K. A., Lguensat Redouane. A Southern Ocean supergyre as a unifying dynamical framework identified by physics-informed machine learning. 2023, 4 (1), p. 153 [20 p.] |
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1810494885076140032 |