On the distribution of silicic acid as a frontal zone tracer in the Indian sector of the Southern Ocean
| Type | Article | ||||||||
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| Date | 1999-06 | ||||||||
| Language | English | ||||||||
| Other localization | http://digital.csic.es/handle/10261/5269 | ||||||||
| Author(s) | Prego R1, Park Yh2, Barciela Mc1, Morvan J3, Poncin J4, Treguer P4 | ||||||||
| Affiliation(s) | 1 : CSIC, Inst Invest Marinas, Vigo 36208, Spain. 2 : Museum Natl Hist Nat, F-75231 Paris, France. 3 : Ecole Natl Super Chim Rennes, F-35700 Rennes, France. 4 : Univ Bretagne Occidentale, Inst Etud Marins, F-29287 Brest, France. |
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| Source | Scientia Marina (0214-8358) (Inst Ciencias Mar Barcelona), 1999-06 , Vol. 63 , N. 2 , P. 121-127 | ||||||||
| WOS© Times Cited | 1 | ||||||||
| Keyword(s) | silicate, tracer, frontal zone, silicate-salinity diagram, Crozet Basin, Southern Ocean | ||||||||
| Abstract | The subantarctic frontal zone surveyed during the April-May 1991 SUZIL cruise in the Crozet-Kerguelen Amsterdam area shows a strong horizontal (north to south) gradient of dissolved silicate, increasing with depth, from 5 to 10 mu molSi kg(-1) at 100 m, and 10 to 70 mu molSi kg(-1) at 600 m. The northern limit of this frontal zone, which is formed by the confluence of the Subtropical and Subantarctic Fronts, is delimited at the surface by the 2 mu molSi kg(-1) silicate isoline. Silicate-salinity diagrams also allow different water regimes to be positioned relative to the frontal zone. This sloping interface is between two water bodies, one to the north with more saline subtropical waters of less concentrated silicate than the southern one, corresponding to subantarctic waters which are less saline and richer in silicate. It is concluded that dissolved sill care can be used as a useful tracer of frontal zone water masses in the Indian sector of the Southern Ocean, providing a sound complement to other hydrographic data. | ||||||||
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