Estimating internal wave spectra using constrained models of the dynamic ocean

Details Estimating internal wave spectra using constrained models of the dynamic ocean Estimating internal wave spectra using constrained models of the dynamic ocean

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3600d07v&link_type=abstract

Geophysical Research Letters, Volume 36, CiteID L00D07

Physics

1

Oceanography: General: Numerical Modeling (0545, 0560, 1952), Seismology: General Or Miscellaneous, Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Instruments And Techniques

Scientific paper

Multi-Channel Seismic method (MCS), with its ability to image events down to a lateral resolution of 10 m has been successfully applied to address questions in physical oceanography. However, to date, these analyses have overlooked an important detail; the imaged boundaries are dynamic and move on a timescale that can be resolved by the MCS method. An important step in understanding the effect of the movement is calibration against constrained models. We demonstrate in this paper that it is possible using careful interpolation to take high resolution models of dynamic water (160 m × 2 m spatial resolution and 15 min temporal resolution) and generate models for synthetic seismic simulations (20 m × 4 m spatial resolution and 20 sec temporal resolution). We show that moving water, when ignored, will distort analyses of wavenumber spectra estimated from seismic data since the relative movement of water masses and the seismic acquisition vessel will change the apparent slope of spectra.

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