Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3323611s&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 23, CiteID L23611
Other
10
Oceanography: Physical: Western Boundary Currents, Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Currents, Oceanography: General: Numerical Modeling (0545, 0560), Oceanography: General: Continental Shelf And Slope Processes (3002)
Scientific paper
The Agulhas Current forms an important link in the global ocean thermohaline circulation by its role in the inter-ocean exchange of water south of Africa. This process of ring shedding at the current's retroflection is dependent on perturbations to its trajectory that are sensitive to bathymetry. These perturbations may furthermore force the current to intersect shallow regions resulting in substantial changes to its path. A number of other flow characteristics of the system have also been deemed to be influenced by bathymetry. How dependent is Agulhas Current behaviour therefore on the bottom topography? We have used a regional, primitive equation model for initial experimentation. Removing the Agulhas Bank leads to enhanced inter-ocean flux, indicating its importance for inter-ocean exchange. Excising the Agulhas Plateau causes meridional meanders in the Agulhas Return Current to be unlocked from the bathymetry. Smoothing the continental slope weakens the current and substantially increases the direct inter-ocean flux.
Blanke Bruno
Lutjeharms Johann R. E.
Penven Pierrick
Speich Sabrina
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