High resolution seismic imaging of the ocean structure using small volume airgun source array in the Gulf of Cadiz.

Geli, L., Cosquer, E., Hobbs, R. W., Klaeschen, Dirk , Papenberg, Cord , Thomas, Y., Menesguen, C. and Hua, B. L. (2009) High resolution seismic imaging of the ocean structure using small volume airgun source array in the Gulf of Cadiz. Open Access Geophysical Research Letters, 36 . L00D09. DOI 10.1029/2009GL040820.

[img]
Preview
Text
884_Geli_2009_HighResolutionSeismicImagingOf_Artzeit_pubid12705.pdf - Published Version

Download (369Kb)

Supplementary data:

Abstract

A small volume (117 cu-inch) seismic source producing signal predominantly in the 150–200 Hz frequency window was used during the GO calibration experiment in the Gulf of Cadiz (April–May 2007). The data show the small scale (<10 m in the z direction) internal structure of the ocean. High-resolution images display seismic reflectors that often appear as distinct, horizontal, short (∼a few hundred meters to a few km long) segments, lying at different depths, while low-resolution (∼20 to 30 Hz) display long, horizontal reflectors (∼a few tens of km), sometimes linked by short, apparently “dipping” segments. The present data suggest that this apparent dipping effect is due to the insufficient separation power (∼λ/4) of the low resolution data. Improving high resolution acquisition systems hence appears to be a critical challenge to understand the seismic response of the ocean.

Document Type: Article
Keywords: Oceanography, Seismics, high-resolution; R.V. Poseidon; POS350; RRS Discovery
Research affiliation: 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.: 10.1029/2009GL040820
ISSN: 0094-8276
Projects: Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 09 Dec 2009 11:02
Last Modified: 12 Oct 2017 12:07
URI: http://oceanrep.geomar.de/id/eprint/7884

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...