Physics – Geophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3600d09g&link_type=abstract
Geophysical Research Letters, Volume 36, CiteID L00D09
Physics
Geophysics
Oceanography: Physical: Internal And Inertial Waves, Exploration Geophysics: Data Processing
Scientific paper
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.
Cosquer E.
Géli Louis
Hobbs Richard W.
Hua B. L.
Klaeschen Dirk
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