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| Penduff, Thierry; Serazin, Guillaume; Leroux, Stephanie; Close, Sally; Molines, Jean-marc; Barnier, Bernard; Bessieres, Laurent; Terray, Laurent; Maze, Guillaume. |
| Global ocean models that admit mesoscale turbulence spontaneously generate a substantial interannual-to-multidecadal chaotic intrinsic variability in the absence of atmospheric forcing variability at these timescales. is phenomenon is substantially weaker in non-turbulent ocean models but provides a marked stochastic avor to the low-frequency variability in eddying ocean models, which are being cou- pled to the atmosphere for next-generation climate projections. In order to disentangle the atmospherically forced and intrinsic ocean variabilities, the OCCIPUT (OceaniC Chaos – ImPacts, strUcture, predicTability) project performed a long (1960–2015), large ensemble (50 members) of global ocean/sea ice 1/4° simulations driven by the same atmospheric... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00448/55959/57440.pdf |
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| Cravatte, Sophie; Serazin, Guillaume; Penduff, Thierry; Menkes, Christophe. |
| The southwestern Pacific Ocean sits at a bifurcation where southern subtropical waters are redistributed equatorward and poleward by different ocean currents. The processes governing the interannual variability of these currents are not completely understood. This issue is investigated using a probabilistic modeling strategy that allows disentangling the atmospherically forced deterministic ocean variability and the chaotic intrinsic ocean variability. A large ensemble of 50 simulations performed with the same ocean general circulation model (OGCM) driven by the same realistic atmospheric forcing and only differing by a small initial perturbation is analyzed over 1980–2015. Our results show that, in the southwestern Pacific, the interannual variability of... |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00685/79702/82490.pdf |
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