Upstream control of Agulhas Ring shedding

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Upstream control of Agulhas Ring shedding

[1] Rings shed in the Agulhas Retroflection region play an important role in the global thermohaline circulation. The shedding of these rings has been considered very irregular. In this paper, we present evidence for remote control of the timing and frequency of the ring shedding events. This turns out to be a far more regular process, at a frequency of 4–5 cycles per year. The movement of the ...

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Three-dimensional characterization and tracking of an Agulhas Ring

1463-5003/$ see front matter 2012 Elsevier Ltd. A http://dx.doi.org/10.1016/j.ocemod.2012.05.001 ⇑ Corresponding author. Tel.: +49 5251 60 4209. E-mail address: [email protected] (C. Horenkam 1 Current address: Department of Mathematics, UN Chapel Hill, NC 27599-3250, USA. A novel probabilistic methodology is applied to identify optimally coherent structures associated with Agulhas Rings, with...

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Agulhas ring Trajectories and Evolution from Altimeter data

Oceanic vortices have been the subject of several experimental and theoretical studies. They play a key role in the energy budget of the global ocean. A better understanding of their physics, (e.g. interaction with the mean currents) would improve our knowledge of the ocean circulation. Satellite altimeter data are used to detect, track and analyze the strong anticyclonic eddies generated by th...

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Decoupling of the Agulhas Leakage from the Agulhas Current

The relationship between theAgulhas Current and theAgulhas leakage is not well understood. Here, this is investigated using two basin-scale and two global ocean models of incrementally increasing resolution. The response of the Agulhas Current is evaluated under a series of sensitivity experiments, in which idealized anomalies, designed to geometrically modulate zonal trade wind stress, are app...

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Natal pulses and the formation of Agulhas rings

Large solitary meanders form on the Agulhas Current at irregular intervals as it travels along the east coast of South Africa. These so-called Natal pulses are thought to have a significant effect on the shedding of Agulhas rings downstream at the Agulhas Retrofiection and thereby on the exchange of water properties between the Indian and the Atlantic Ocean. Data from the Geosat, ERS 1, and TOP...

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ژورنال

عنوان ژورنال: Journal of Geophysical Research

سال: 2002

ISSN: 0148-0227

DOI: 10.1029/2001jc000804