The Scattering And Damping Of Ice-coupled Waves

摘要

Ice-coupled waves travelling beneath solid ice sheets experience decay arising from both scattering (reflections by inho-mogeneities) and damping (a consequence of the viscoelasticity in the sea ice and energy loss in the water). Scattering and damping have been examined in isolation but rarely together, which is necessary if a model is to simulate reality accurately. This deficiency is addressed here. We describe a model that assimilates these mechanisms, which is used to reproduce waves under 2-dimensional ice sheets of variable thickness. Damping is more significant for lower period waves, and scattering causes a reduction in the observed decay rate.