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Modelling water wave attenuation through random fields of ice floes: Is scattering the answer?

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MWSW02 - Theory of wave scattering in complex and random media

Scattering has long been hypothesized to be the dominant process governing the attenuation of ocean waves in the marginal ice zone (MIZ) in conditions where the horizontal dimension of the constituent ice floes is similar to the wavelength. Increasingly advanced mathematical and numerical models have been proposed in the last 4 decades to approximate the multiple scattering of cean waves through random arrays of floating ice floes on increasingly large spatial scales. When comparing model predictions to field observations, however, it seems scattering cannot explain many of the empirically determined features, especially the relationship between the spatial rate of wave energy attenuation and wave period. In this talk, I will go over some historical developments of linear multiple scattering theory as a model for ocean wave attenuation in the MIZ and present recent evidence suggesting that such models likely need to be enhanced with or replaced by parameterisations of non-linear dissipative processes in the water waves/sea ice system. I’d like to acknowledge my collaborators on this work, especially Nico Mokus, Dr Johannes Mosig, A/P Luke Bennetts and Prof Vernon Squire.

This talk is part of the Isaac Newton Institute Seminar Series series.

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