Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean
International audience Mesoscale ocean turbulence is the best-known expression of Chaotic Intrinsic Variability (CIV), which spontaneously emerges from the unstable ocean circulation. This chaotic behavior can reach the scale of several thousand kilometers and decades, via e.g. spatiotemporal invers...
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ftunigrenoble:oai:HAL:hal-04550324v1 2024-05-19T07:48:21+00:00 Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean Penduff, Thierry Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Online, New Zealand 2022-02 https://hal.science/hal-04550324 en eng HAL CCSD hal-04550324 https://hal.science/hal-04550324 13th International Conference on Southern Hemisphere Meteorology and Oceanography https://hal.science/hal-04550324 13th International Conference on Southern Hemisphere Meteorology and Oceanography, Feb 2022, Online, New Zealand [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/conferenceObject Conference papers 2022 ftunigrenoble 2024-04-25T00:15:55Z International audience Mesoscale ocean turbulence is the best-known expression of Chaotic Intrinsic Variability (CIV), which spontaneously emerges from the unstable ocean circulation. This chaotic behavior can reach the scale of several thousand kilometers and decades, via e.g. spatiotemporal inverse cascade or large-scale baroclinic instability processes. Global ensemble simulations of the eddying ocean/sea-ice system indicate that interannual to multi-decadal CIV has the strongest imprints south of about 30°S, where it competes with (and in certain regions exceeds) the atmospherically-forced variability (AFV). This presentation summarizes various results about the low-frequency, large-scale impacts of AFV and CIV on climate-relevant oceanic indices in the Southern Ocean (SO), such as heat content, volume and heat transports, sea level rise, and air-sea CO2 fluxes. These results question the attribution to atmospheric drivers of observed fluctuations in the SO, their predictability, and their potential influence in coupled climate simulations. Conference Object Sea ice Southern Ocean Université Grenoble Alpes: HAL |
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Université Grenoble Alpes: HAL |
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English |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Penduff, Thierry Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Mesoscale ocean turbulence is the best-known expression of Chaotic Intrinsic Variability (CIV), which spontaneously emerges from the unstable ocean circulation. This chaotic behavior can reach the scale of several thousand kilometers and decades, via e.g. spatiotemporal inverse cascade or large-scale baroclinic instability processes. Global ensemble simulations of the eddying ocean/sea-ice system indicate that interannual to multi-decadal CIV has the strongest imprints south of about 30°S, where it competes with (and in certain regions exceeds) the atmospherically-forced variability (AFV). This presentation summarizes various results about the low-frequency, large-scale impacts of AFV and CIV on climate-relevant oceanic indices in the Southern Ocean (SO), such as heat content, volume and heat transports, sea level rise, and air-sea CO2 fluxes. These results question the attribution to atmospheric drivers of observed fluctuations in the SO, their predictability, and their potential influence in coupled climate simulations. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Conference Object |
author |
Penduff, Thierry |
author_facet |
Penduff, Thierry |
author_sort |
Penduff, Thierry |
title |
Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean |
title_short |
Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean |
title_full |
Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean |
title_fullStr |
Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean |
title_full_unstemmed |
Interannual to multidecadal chaotic ocean variability: large-scale impacts in the Southern Ocean |
title_sort |
interannual to multidecadal chaotic ocean variability: large-scale impacts in the southern ocean |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-04550324 |
op_coverage |
Online, New Zealand |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
13th International Conference on Southern Hemisphere Meteorology and Oceanography https://hal.science/hal-04550324 13th International Conference on Southern Hemisphere Meteorology and Oceanography, Feb 2022, Online, New Zealand |
op_relation |
hal-04550324 https://hal.science/hal-04550324 |
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1799466565128683520 |