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Hydrography and flow in the Lucky Strike segment of the Mid-Atlantic Ridge ArchiMer
Thurnherr, A. M.; Reverdin, G; Bouruet Aubertot, P; Laurent, L; Vangriesheim, Annick; Ballu, V.
The Lucky Strike segment between 37 and 38N on the Mid-Atlantic Ridge is the focus of the international MoMAR program to monitor seafloor-spreading processes. During the GRAVILUCK cruise in August 2006, hydrographic, velocity and light-scattering data were collected in the rift valley at Lucky Strike in order to investigate the regional dynamics and to provide background information for the monitoring effort. The survey observations reveal a remarkably simple dynamical setting dominated by persistent northward flow transporting approximate to 0.2 Sv of water along the rift valley. Approximately half of this transport must upwell within a deep basin that occupies the northern half of the segment. In the comparatively shallow segment center, the along-valley...
Tipo: Text Palavras-chave: Azores triple junction; Central north Atlantic; Hydrothermal vents; Particle flux; Rift valley; Heat flux; Water; Circulation; Currents; Fields.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4785.pdf
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Temporal change in deep-sea benthic ecosystems: a review of the evidence from recent time-series studies ArchiMer
Glover, A. G.; Gooday, A. J.; Bailey, D. M.; Billett, D. S. M.; Chevaldonne, P.; Colaco, Ana; Copley, J.; Cuvelier, Daphne; Desbruyeres, Daniel; Kalogeropoulou, V.; Klages, M.; Lampadariou, N.; Lejeusne, C.; Mestre, Nelia; Paterson, G. L. J.; Perez, T.; Ruhl, H.; Sarrazin, Jozee; Soltwedel, T.; Soto, E. H.; Thatje, S.; Tselepides, A.; Van Gaever, S.; Vanreusel, A..
Societal concerns over the potential impacts of recent global change have prompted renewed interest in the long term ecological monitoring of large ecosystems The deep sea is the largest ecosystem on the planet the least accessible and perhaps the least understood Nevertheless deep sea data collected over the last few decades are now being synthesised with a view to both measuring global change and predicting the future impacts of further rises in atmospheric carbon dioxide concentrations For many years it was assumed by many that the deep sea is a stable habitat buffered from short term changes in the atmosphere or upper ocean However recent studies suggest that deep seafloor ecosystems may respond relatively quickly to seasonal inter annual and decadal...
Tipo: Text Palavras-chave: Mid atlantic ridge; East pacific rise; Gulf of Mexico; Hydrothermal vent communities; Long term change; Portuguese continental margin; Abyssal northeast pacific; Azores triple junction; Cold seep ecosystems; Dark submarine caves.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00030/14120/12727.pdf
Registros recuperados: 2
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