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Three Decades of Research on the Greater Agulhas Current : Volume 3, Issue 1 (23/02/2007)

By Lutjeharms, J. R. E.

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Book Id: WPLBN0004020311
Format Type: PDF Article :
File Size: Pages 19
Reproduction Date: 2015

Title: Three Decades of Research on the Greater Agulhas Current : Volume 3, Issue 1 (23/02/2007)  
Author: Lutjeharms, J. R. E.
Volume: Vol. 3, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2007
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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E. Lutjeharm, J. R. (2007). Three Decades of Research on the Greater Agulhas Current : Volume 3, Issue 1 (23/02/2007). Retrieved from http://worldlibrary.net/


Description
Description: Department of Oceanography, University of Cape Town, 7700 Rondebosch, South Africa. 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.

Summary
Three decades of research on the greater Agulhas Current

Excerpt
Anderson, F. P., Gründlingh, M. L., and Stavropoulos, C. C.: Kinematics of the southern Natal coastal circulation: some historic measurements 1962–63, S. Afr. J. Sci., 84, 857–860, 1988.; Arhan, M., Mercier, H., and Lutjeharms, J. R. E.: The disparate evolution of three Agulhas rings in the South Atlantic Ocean, J. Geophys. Res., 104, 20 987–21 005, 1999.; Bang, N. D.: Major eddies and frontal structures in the Agulhas Current retroflexion (sic) area in March, 1969, in: Symposium Oceanography South Africa 1970, South African National Committee for Oceanographic Research, 16 pp., 1970a.; Bang, N. D.: Dynamic interpretations of a detailed surface temperature chart of the Agulhas Current retroflexion (sic) and fragmentation area, S. Afr. geogr. J., 52, 67–76, 1970b.; Bang, N. D.: Characteristics of an intense ocean frontal system in the upwell regime west of Cape Town, Tellus, 25, 256–265, 1973a.; Bang, N. D.: Oceanography: Oceanographic Environment of Southern Africa, in: Standard Encyclopaedia of Southern Africa, edited by: Spies, J. J. and du Plessis, P. C., vol. 8, Nasou, Cape Town, pp. 282–286, 1973b.; Beal, L. M. and Bryden, H. L.: Observations of an Agulhas Undercurrent, Deep-Sea Res. I, 44, 1715–1724, 1997.; Beal, L. M. and Bryden, H. L.: The velocity and vorticity structure of the Agulhas Current at 32° S, J. Geophys. Res., 104, 5151–5176, 1999.; Beckley, L. E.: Sea-surface temperature variability around Cape Recife, South Africa, S. Afr. J. Sci., 79, 436–438, 1983.; Beismann, J.-O., Käse, R. H., and Lutjeharms, J. R. E.: On the influence of submarine ridges on translation and stability of Agulhas rings, J. Geophys. Res., 104, 7897–7906, 1999.; Biastoch, A. and Krauss, W.: The role of mesoscale eddies in the source regions of the Agulhas Current, J. Phys. Oceanogr., 29, 2303–2317, 1999.; Christensen, M. S.: Sea-surface temperature charts for Southern Africa, south of 26° S, S. Afr. J. Sci., 76, 541–546, 1980.; Boebel, O., Duncombe Rae, C., Garzoli, S., Lutjeharms, J., Richardson, P., Rossby, T., Schmid, C., and Zenk, W.: Float experiment studies interocean exchanges at the tip of Africa, Eos, Trans. Am. geophys. Un., 79(1), 7–8, 1997.; Boebel, O., Lutjeharms, J., Schmid, C., Zenk, W., Rossby, T., and Barron, C.: The Cape Cauldron: a regime of turbulent inter-ocean exchange, Deep-Sea Res. II, 50, 57–86, 2003a.; Boebel, O., Rossby, T., Lutjeharms, J., Zenk, W., and Barron, C.: Path and variability of the Agulhas Return Current, Deep-Sea Res. II, 50, 35–56, 2003b.; Belkin, I. M. and Gordon, A. L.: Southern Ocean fronts from the Greenwich meridian to Tasmania, J. Geophys. Res., 101, 3675–3696, 1996.; Boudra, D. B., Maillet, K. A., and Chassignet, E. P.: Numerical modeling of Agulhas retroflection and ring formation with isopycnal outcropping, in: Meso-scale/Synoptic Coherent Structures in Geophysical Turbulence, edited by: Nihoul, J. C. J. and Jamart, B. M., Elsevier, Amsterdam, pp 315–335, 1989.; Boyd, A. J., Tromp, B. B. S., and Horstman, D. A.: The hydrology of the South African south-western coast between Cape Point and Danger Point in 1975, S. Afr. J. Mar. Sci., 3, 145–168, 1985.; Boyd, A. J., Taunton-Clark, J., and Oberholster, G. P. J.: Spatial features of the near-surface and midwater circulation patterns off western and southern South Africa and their role in the life histories of various commercially fished species, S. Afr. J. Mar. Sci., 12, 189–206, 1992.; Byrne, D. A., Gordon, A. L., and Haxby, W. F.: Agulhas Eddies: a synoptic view using Geosat ERM data, J. Phys. Oceanogr., 25, 902–917, 1995.; Carter, R. and d'Aubrey, J.: Inorganic nutrients in Natal continental shelf waters, in: Coastal Ocean Studies off Natal, South Africa, edited by: Schumann, E. H., Lecture Notes on Coastal and Estuarine Studies

 

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