René Schubert

Université de Bretagne Occidentale | UBO

The oceanic kinetic energy cascade, the flux of kinetic energy between currents of different horizontal scales, shapes the structure of the global ocean circulation and the associated heat, salt, nutrient, and oxygen fluxes. Here, we show with a numerical ocean simulation that the surface geostrophic cascade can be estimated from satellite altimetr...

The oceanic kinetic energy cascade, the flux of kinetic energy between currents of different horizontal scales, shapes the structure of the global ocean circulation and associated heat, salt, nutrient, and oxygen fluxes. Here, we show with two numerical ocean simulations that the surface geostrophic cascade can be estimated from satellite altimetry...

Agulhas leakage, the transport of warm and salty waters from the Indian Ocean into the South Atlantic, has been suggested to increase under anthropogenic climate change, due to strengthening Southern Hemisphere westerly winds. The resulting enhanced salt transport into the South Atlantic may counteract the projected weakening of the Atlantic overtu...

With the increase in computational power, ocean models with kilometer-scale resolution have emerged over the last decade. These models have been used for quantifying the energetic exchanges between spatial scales, informing the design of eddy parametrizations, and preparing observing networks. The increase in resolution, however, has drastically in...

Process mining is an established technique to automatically discover a descriptive model of the execution of a process based on event data. Commonly, the event data is recorded by information systems referring to business events and typically tracked at a higher activity abstraction. Disciplines like economics, engineering, life and natural science...

Process mining is an established technique to automatically discover a descriptive model of the execution of a process based on event data. Commonly, the event data is recorded by information systems referring to business events and typically tracked at a higher activity abstraction. Disciplines like economics, engineering, life and natural science...

With the increase in computational power, ocean models with kilometer-scale resolution have emerged over the last decade. These models have been used for quantifying the energetic exchanges between spatial scales, informing the design of eddy parametrizations and preparing observing networks. The increase in resolution, however, has drastically inc...

Agulhas leakage, the warm and salty inflow of Indian Ocean water into the Atlantic Ocean, is of importance for the climate-relevant Atlantic Meridional Overturning Circulation. South of Africa, the eastward turning Agulhas Current sheds Agulhas rings, cyclones and filaments of order 100 km that carry the Indian Ocean water into the Cape Basin and f...

Mesoscale eddies can be strengthened by the absorption of submesoscale eddies resulting from mixed-layer baroclinic instabilities. This is shown for mesoscale eddies in the Agulhas Current system by investigating the kinetic energy cascade with a spectral and a coarse-graining approach in two model simulations of the Agulhas region. One simulation...

Mesoscale eddies are central to the oceanic circulation and the global climate. Of particular importance, in this respect, are mesoscale eddies in the Agulhas region south of Africa, as they govern the inflow of warm and salty Indian Ocean waters into the Atlantic Ocean. In this dissertation, it is shown that these eddies are strengthened by submes...

Abstract Mesoscale dynamics of the Agulhas Current system determine the exchange between the Indian and Atlantic oceans, thereby influencing the global overturning circulation. Using a series of ocean model experiments compared to observations, we show that the representation of mesoscale eddies in the Agulhas ring path improves with increasing res...

The Agulhas Current, the western boundary current of the South Indian Ocean, has been shown to play an important role in the connectivity between the Indian and Atlantic oceans. The greater Agulhas Current system is highly dominated by mesoscale dynamics. To investigate their influence on the regional and global circulations, a family of high-resol...

The Agulhas Current, the western boundary current of the South Indian Ocean, has been shown to play an important role in the connectivity between the Indian and Atlantic oceans. The greater Agulhas Current system is highly dominated by mesoscale dynamics. To investigate their influence onto the regional and global circulations, a family of high-res...

Benthic storms are important for both the energy budget of the ocean and for sediment resuspension and transport. Using 30 years of output from a high-resolution model of the North Atlantic, it is found that most of the benthic storms in the model occur near the western boundary in association with the Gulf Stream and the North Atlantic Current, in...