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Petrenko, Aa; Jones, Bh; Dickey, Td; Lehaitre, Michel; Moore, C. |
The effect of a sewage plume on the biology, optical characteristics, and particle size distributions of coastal waters was evaluated around the Sand Island, Hawaii, outfall diffuser. In situ physical and biooptical data and Niskin bottle samples were collected during a 1-week cruise from September 25 to October 1, 1994. One or two layers affected by sewage could be distinguished in the water column: recently discharged (''new'') sewage plume waters and ''old'' plume waters. In conditions characterized by high Froude number the distribution of chlorophyll fluorescence in new plume waters was the same as for ambient waters, while for low Froude number, chlorophyll fluorescence increased within the plume, demonstrating the importance of physical forcing on... |
Tipo: Text |
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Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00335/44647/57346.pdf |
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Baltzer, Agnès; Tessier, Bernadette; Nouze, Herve; Bates, R; Moore, C; Menier, D. |
The presence of gas is a common feature in many seismic sections. However, the origin of the gas is often difficult to determine. Recently acquired very high resolution seismic profiles using an IKB Seistec boomer provide useful insight to the understanding of the gas origins in a range of environmental settings including sea lochs and coastal lagoons. The gas features are described both from a qualitative point of view through their acoustic facies, and quantitatively through the associated seismic signal (polarisation, amplitude). Acoustic facies include acoustic turbidity, gas "curtains" and "blankets" as well as "white fringes" and "black shadows". All the features encountered have been related to specific gas nature generated by different sources... |
Tipo: Text |
Palavras-chave: Signal amplitude; Signal polarisation; Gas; Acoustic facies; Seistec profiles. |
Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-835.pdf |
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