(2010). Atlantic overturning circulation and Agulhas leakage influences on southeast Atlantic upper ocean hydrography during marine isotope stage 11. Paleoceanography, 25 PA3208. For guidance on citations see FAQs. Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data pol...

The sensitivity of the Atlantic Ocean meridional overturning circulation to the vertical diffusion coefficient in the global coupled atmosphere–ocean–sea ice model CLIMBER-3 is investigated. An important feature of the three-dimensional ocean model is its low-diffusive tracer advection scheme. The strength Mmax of the Atlantic overturning is decomposed into three components: 1) the flow MS expo...

Convective overturning arising from static instability during winter is thought to play a crucial role in the formation of NADW. In Ocean General Circulation Models (OGCMs), a strong reduction in convective penetration depth arises when horizontal diffusion (HD) is replaced by Gent and McWilliams (GM) mixing to model the effect of mesoscale eddies on tracer advection. In areas of sinking, the r...

Simulations in a three-dimensional numerical wave tank are performed to investigate the shoaling and breaking of a solitary wave over a sloping ridge with a lateral modulation. The model is based on a high-order boundary element method combined with a mixed Eulerian–Lagrangian formulation. Our study is focused on the case of a plunging breaker and is aimed at describing the phenomenon of wave o...

[1] We investigate the sensitivity of the deep meridional overturning circulation (MOC) in the Southern Ocean to changes in the easterly wind stress over the Antarctic continental slope. The deep MOC is driven by export of dense Antarctic Bottom Water from the Antarctic continental shelf, and exerts a strong influence on climate by ventilating the deep ocean with oxygen and storing carbon dioxi...

[1] Abstract: The density structure along the ocean margins carries an integrated imprint of ocean circulation. The difference in pressure between the eastern and western margins of the ocean reflects the net meridional geostrophic transport across the ocean basin. If one assumes that the wind driven circulation is closed in the upper ocean, the wind driven component of the net geostrophic tran...

The processes that govern the predictability of decadal variations in the North Atlantic Meridional Overturning Circulation (MOC) are investigated in a long control simulation of the ECHO-G coupled atmosphere-ocean model. We elucidate the roles of local stochastic forcing by the atmosphere, and other potential ocean processes, and use our results to build a predictive regression model. The prim...