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| Registros recuperados: 42 | |
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| Boucher, G.; Clavier, Jacques; Garrigue, Claire. |
| Ammonium affinity of New Caledonia lagoon benthic communities was measured during the course of 33 #in situ$ enrichment experiments, in order to estimate the contribution of benthos to ammonium fluxes. Ammonium chloride was injected into enclosures pushed into the sediment ... Ammonium kinetic uptake was then followed for two yours. Grey-sand bottom displayed the highest affinity was the same order of magnitude. Macrophytes, and microphytes (when macrophytes are absent), account for the bulk of ammonium bottom uptake. As a result, grey-sand bottoms with their dense macrophyte cover represent a sink for water column nitrogen and play a key role in nutrient cycling of the lagoon. (D'après résumé d'auteur) |
| Tipo: Text |
Palavras-chave: LAGON; SEDIMENT; BENTHOS; AMMONIUM; FLUX; CORRELATION NUMERIQUE; MACROPHYTE; CYCLE DE L'AZOTE. |
| Ano: 1994 |
URL: http://www.documentation.ird.fr/hor/fdi:39878 |
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| Roemmich, D.; Morris, M.; Young, W.R.; Donguy, Jean-René. |
| A vertically sheared eastward jet in the Equatorial pacific in late 1991 and early 1992 carried relatively fresh water from the Western Pacific overriding the saltier surface layer of the central region. Salinity anomalies of about -1.0 psu were observed over a period of several months in a surface layer 50 m thick near the equator. Below this fresh layer there was a steep halocline having very little temperature stratification, so that the density changes were dominated by salinity. In December 1991, eastward surface velocities in the fresh jet at 170°W were 100 cm s-1 with a shear of about 40 cm s-1 in the top 100 m; the core of the jet was about 200 km in width, centered at 1.5°S. The jet decayed and vanished over the next few months, though the surface... |
| Tipo: Text |
Palavras-chave: CIRCULATION OCEANIQUE; COURANT EQUATORIAL; FLUX; SALINITE; TEMPERATURE. |
| Ano: 1994 |
URL: http://www.documentation.ird.fr/hor/fdi:42863 |
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| Registros recuperados: 42 | |
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