Mid-depth internal wave energy off the Iberian Peninsula estimated from seismic reflection data.

Krahmann, Gerd , Brandt, Peter , Klaeschen, Dirk and Reston, Timothy J. (2008) Mid-depth internal wave energy off the Iberian Peninsula estimated from seismic reflection data. Open Access Journal of Geophysical Research: Oceans, 113 . C12016. DOI 10.1029/2007JC004678.

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Abstract

Energy levels of internal waves are estimated from seismic reflection data. Three legacy seismic sections from 1993 and 1997 obtained off the Iberian Peninsula have been analyzed for acoustic reflections within the water column. The reflections are aligned continuously for up to several kilometers over large parts of the sections and in the depth interval from 200 to 2000 m. Depth variations of these reflections are thought to be caused by the background internal wave field. From the variations we derive horizontal wave number spectra of normalized internal wave displacement. The general slope of the power density spectra is remarkably consistent for all sections and agrees well with model spectra for internal waves. Significant differences within the sections can be found when sufficiently large subsections are averaged. The spatial variation of the energy level indicates increasing internal wave activity with shallower water depths as well as near a subsurface eddy.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2007JC004678
ISSN: 2169-9275
Projects: Future Ocean, GO
Date Deposited: 09 Dec 2009 11:02
Last Modified: 24 Apr 2018 13:38
URI: http://oceanrep.geomar.de/id/eprint/1432

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