A weaker Agulhas Current leads to more Agulhas leakage

Details A weaker Agulhas Current leads to more Agulhas leakage A weaker Agulhas Current leads to more Agulhas leakage

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3603601v&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 3, CiteID L03601

Physics

15

Oceanography: Physical: Decadal Ocean Variability (1616, 1635, 3305, 4215), Oceanography: Physical: Western Boundary Currents, Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513), Oceanography: Physical: Topographic/Bathymetric Interactions

Scientific paper

Time series of transports in the Agulhas region have been constructed by simulating Lagrangian drifter trajectories in a 1/10 degree two-way nested ocean model. Using these 34 year long time series it is shown that smaller (larger) Agulhas Current transport leads to larger (smaller) Indian-Atlantic inter-ocean exchange. When transport is low, the Agulhas Current detaches farther downstream from the African continental slope. Moreover, the lower inertia suppresses generation of anti-cyclonic vorticity. These two effects cause the Agulhas retroflection to move westward and enhance Agulhas leakage. In the model a 1 Sv decrease in Agulhas Current transport at 32°S results in a 0.7 +/- 0.2 Sv increase in Agulhas leakage.

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