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| Perez, Ff; Tokarczyk, R; Figueiras, Fg; Rios, Af. |
| This study - carried out between the Elephant and the Orkney islands - showed that spatial variability in the marginal ice-edge zone (MIZ) was greater than that found in open sea. Salinity and silicate contents point to the existence of two fronts: the first - near Elephant Island - separates the Surface Antarctic Water coming from Drake Passage from the winter water originating in the Weddell Sea. This water is characterized by its high concentrations of nitrate (> 30 mu M) and silicates (> 80 mu M). The second front - near the South Orkney Islands undergoes the influence by a less saline water lens (< 34 %), poor in nutrients (N-NO3 < 24 mu M) and rich in chlorophyll (> 3.5 mg Chl a 1(-1)). Water masses circulation reveals the existence of... |
| Tipo: Text |
Palavras-chave: MARGINAL ICE; WEDDELL SEA; WATER MASSES; NUTRIENTS; CHLOROPHYLL. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00098/20883/18497.pdf |
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| Perez, Ff; Alvarezsalgado, Xa; Roson, G; Rios, Af. |
| Biogenic element levels in continental runoff and their behaviour during estuarine mixing are studied in the Galician Rias Baixas for the upwelling season (May-October). Alkalinity, calcium, both with average concentrations of about 350 mumol.kg-1, and reactive silica, with 105 mumol.kg-1, show near conservative distributions along the estuarine side of the rias. A good agreement was found between values obtained by direct measurement in the river and those calculated by extrapolation to zero salinity from the mixing diagrams. On the other hand, nitrate (10-40 mumol.kg-1) and mainly phosphate (1 mumol.kg-1) are strongly affected by the biological activity of benthic algae during estuarine mixing. TON and ammonium in the innermost parts of the Ria de Arousa... |
| Tipo: Text |
Palavras-chave: BIOGENIC ELEMENTS; TON; RUNOFF; ESTUARINE MIXING; RIAS-BAIXAS. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00101/21184/18801.pdf |
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