Abatement of Ocean-Wave Impact by Crevasses in an Ice Shelf

Forced ice-shelf oscillations modeling was undertaken employing a full 3D finite-difference model of an elastic ice shelf that coupled to treatment under-shelf seawater flux. The flux described by the wave equation, which includes pressure excitements in shallow water layer under shelf. Thus, flexure produced hydrostatic below-shelf seawater. Numerical calculations were performed for idealized rectangular crevasse-ridden geometry. crevasses modeled as notches into In numerical experiments, ice-plate flexures forced harmonic-entering having range periodicities 5–250 s. dispersion spectra derived revealed “band gaps”—frequency ranges where no eigenmodes exist. results further showed impact ocean waves on plate is abated from point view decrease spectral average amplitude vicinity spectrum gaps” are observed. This depends depth crevasse penetration ice.