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| Kersalé, M.; Meinen, C. S.; Perez, Rc; Le Hénaff, M.; Valla, D.; Lamont, T.; Sato, O. T.; Dong, S.; Terre-terrillon, Thierry; Van Caspel, M.; Chidichimo, M. P.; Van Den Berg, M.; Speich, S.; Piola, A. R.; Campos, E. J. D.; Ansorge, I.; Volkov, D. L.; Lumpkin, R.; Garzoli, S. L.. |
| The Meridional Overturning Circulation (MOC) is a primary mechanism driving oceanic heat redistribution on Earth, thereby affecting Earth’s climate and weather. However, the full-depth structure and variability of the MOC are still poorly understood, particularly in the South Atlantic. This study presents unique multiyear records of the oceanic volume transport of both the upper (<~3100 meters) and abyssal (>~3100 meters) overturning cells based on daily moored measurements in the South Atlantic at 34.5°S. The vertical structure of the time-mean flows is consistent with the limited historical observations. Both the upper and abyssal cells exhibit a high degree of variability relative to the temporal means at time scales, ranging from a few days to a... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00645/75705/76614.pdf |
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| Hutchinson, K.; Swart, S.; Meijers, A.; Ansorge, I.; Speich, Sabrina. |
| An enhanced Altimetry Gravest Empirical Mode (AGEM), including both adiabatic and diabatic trends, is developed for the Antarctic Circumpolar Current (ACC) south of Africa using updated hydrographic CTD sections, Argo data, and satellite altimetry. This AGEM has improved accuracy compared to traditional climatologies and other proxy methods. The AGEM for the Atlantic Southern Ocean offers an ideal technique to investigate the thermohaline variability over the past two decades in a key region for water mass exchanges and transformation. In order to assess and attribute changes in the hydrography of the region, we separate the changes into adiabatic and diabatic components. Integrated over the upper 2000 dbar of the ACC south of Africa, results show mean... |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00333/44453/44124.pdf |
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