Modelling dynamic strains on ice shelves resulting from flexural and extensional motions forced by ocean wave packets
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2026
Authors
Bennetts, L.G.
Liang, J.I.E.
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ANZIAM Journal, 2026; 68:e4-1-e4-22
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Luke G. Bennetts and Jie Liang
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Abstract
The transient response of an ice shelf to an incident wave packet from the open ocean is studied with a model that allows for extensional waves in the ice shelf, in addition to the standard flexural waves. Results are given for strains imposed on the ice shelf by the incident packet, over a range of peak periods in the swell regime and a range of packet widths. In spite of large differences in speeds of the extensional and flexural waves, it is shown that there is generally an interval of time during which they interact, and the coherent phases of the interactions generate the greatest ice shelf strain magnitudes. The findings indicate that incorporating extensional waves into models is potentially important for predicting the response of Antarctic ice shelves to swell, in support of previous findings based on frequency-domain analysis.
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© The Author(s), 2026. Published by Cambridge University Press on behalf of The Australian Mathematical Publishing Association Inc. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.