Eddies and other boundary phenomena of the Agulhas Current

Lütjeharms, J. R. E.; Catzel, R.; Valentine, H. R.

doi:10.1016/0278-4343(89)90032-0

Cited by 75 publications

(57 citation statements)

References 20 publications

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“…Shear-edge features on its landward border produce surface plumes of warm water (Lutjeharms et al 1989) that may penetrate right to the coast on occasion (e.g. Goschen and Schumann 1994).…”

Section: Mechanisms To Explain the Coastal Coolingmentioning

confidence: 99%

Abrupt environmental shift associated with changes in the distribution of Cape anchovyEngraulis encrasicolusspawners in the southern Benguela

Roy

Lingen

Coetzee³

et al. 2007

African Journal of Marine Science

147

118

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“…Shear-edge features on its landward border produce surface plumes of warm water (Lutjeharms et al 1989) that may penetrate right to the coast on occasion (e.g. Goschen and Schumann 1994).…”

Section: Mechanisms To Explain the Coastal Coolingmentioning

confidence: 99%

Abrupt environmental shift associated with changes in the distribution of Cape anchovyEngraulis encrasicolusspawners in the southern Benguela

Roy

Lingen

Coetzee³

et al. 2007

African Journal of Marine Science

147

118

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“…Along the eastern edge of this bank the Agulhas Current starts to develop meanders (Harris et al, 1978) very similar to those found on the comparable Gulf Stream. These meanders have been shown to grow downstream (Lutjeharms et al, 1989b) and have attendant cyclonic eddies and warm water plumes. The latter may extend over large parts of the bank even influencing the waters and the biota in bays on the coastline (e.g.…”

Section: Southern Agulhas Currentmentioning

confidence: 99%

Three decades of research on the greater Agulhas Current

Lütjeharms

2007

Ocean Sci.

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Abstract. The greater Agulhas Current has been shown to be a key link in the global thermohaline circulation and an increased understanding of this current system is therefore of more than just local interest. Knowledge on the Agulhas Current system has in fact increased enormously over the past 30 years. This review covers some aspects of what has been learnt on the northern and the southern parts of the Agulhas Current proper and their influence on the waters and circulation of the adjoining continental shelf. It also discusses the Natal Pulse and new information that has been gained on how it is triggered and what influence it has. It deals with the Agulhas retroflection, the shedding of Agulhas rings and the movement and characteristics of these rings that contributes to the meridional overturning circulation of the global ocean. The Agulhas Return Current forms part of the final outflow of the system and current knowledge on that current is appraised. The sources of the Agulhas Current have been a controversial subject for many years and this dispute continues. This is described and discussed, based on what information has been gained from research over the past three decades. Building on what is currently known, some suggestions are given on the most important remaining knowledge gaps and how these could most efficaciously be filled.

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“…and heat (Bryan, 1986;Sallée et al, 2008) over long distances, thereby promoting large-scale mixing of the ocean (Lutjeharms et al, 1989;Ballegooyen et al, 1994;De Ruijter et al, 1999). In addition to the well-studied eddies within the Gulf Stream and Kuroshio Current (Cronin and Watts, 1996;Mensa et al, 2013), eddies are ubiquitous and found in many regions (e.g.…”

Section: Introductionmentioning

confidence: 99%

Anti-cyclonic eddy imprint on calcite geochemistry of several planktonic foraminiferal species in the Mozambique Channel

Steinhardt

Cléroux

Ullgren³

et al. 2014

Marine Micropaleontology

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Hydrographic conditions in the Mozambique Channel are dominated by the passing of large anticyclonic eddies, propagating poleward into the upstream Agulhas area. Further south, these eddies have been found to control the shedding of Agulhas rings into the Atlantic ocean, thereby playing a key role in Indo-Atlantic Ocean exchange. The element composition of several planktonic foraminifera species collected from sediment trap samples, was compared to in situ water column data from the Mozambique Channel. Single-chamber trace element composition of these foraminifera reveals a close coupling with hydrographic changes induced by anticyclonic eddies.Obtained Mg/Ca values for the surface dwelling Globigerinoides ruber as well as the thermocline dwelling Neogloboquadrina dutertrei follow temperature changes and reduced temperature stratification during eddy conditions. At greater depth, Globorotalia scitula and Pulleniatina obliquiloculata record stable temperatures and thus respond to hydrographic changes with a deepening in habitat depth. Furthermore, test Mn/Ca values indicate a close relationship between water column oxygenation and Mn incorporation in these planktonic foraminiferal species.

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Eddies and other boundary phenomena of the Agulhas Current

Cited by 75 publications

References 20 publications

Abrupt environmental shift associated with changes in the distribution of Cape anchovyEngraulis encrasicolusspawners in the southern Benguela

Abrupt environmental shift associated with changes in the distribution of Cape anchovyEngraulis encrasicolusspawners in the southern Benguela

Three decades of research on the greater Agulhas Current

Anti-cyclonic eddy imprint on calcite geochemistry of several planktonic foraminiferal species in the Mozambique Channel

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