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Gulf of Cadiz oceanography for comparison with seismic imaging

Ambar, I.; Alvarado-Bustos, R.; Hobbs, R.; Huthnance, J.; Krahmann, G.; Moate, B.; Silva, P.; Quentel, E.. 2008 Gulf of Cadiz oceanography for comparison with seismic imaging. In: ALSO/AUG/TOS Ocean sciences meeting 2008: from the watershed to the global ocean, 7 March 2008, Orlando, Florida, USA, 7th March 2008. American Society of Limnology and Oceanography.

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Abstract/Summary

The GO project (European Union-NEST-Adventure funding; www.durac.uk/eu.go) aims to assess the potential of seismic imaging of the water column. a dedicated experiment (April-May 2007, gulf of Cadiz) looked at varying Mediterranean Outflow water (MOW) flow along and down the continental slope. Distinctive MOW properties provide strong reflection from seismic sounding. We aim to relate water properties to mixing and hence (e.g.) tides, internal waves, eddies. Physical oceanography results derive from 500 XBT casts, typical spacing 2km, and moorings: three ACDPs, three temperature strings and near-sea-bed turbulence in line on the north-eastern margin of Portimao Canyon (water depths 740-980m); a fourth ADCP-6 km along-slope in 1015 m depth. CTD and LADCP profiling on an IFM-Geomar research cruise, closely following the seismic sections, supplemented the GO measurements. We examine the structures observed on the principal line through the moorings (five surveys,) and compare with the contemporary seismic data that further constrain observed boundaries. The mooring data and profiles are analysed for tides and internal wave spectra, small-scale structure and turbulence to estimate diffusivity and mixing.

Item Type: Publication - Conference Item (Paper)
Programmes: Oceans 2025 > Shelf and coastal processes
Additional Keywords: GULF OF CADIZ;
NORA Subject Terms: Marine Sciences
Date made live: 13 Feb 2009 12:17
URI: http://nora.nerc.ac.uk/id/eprint/5361

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