Journal
JOURNAL OF MARINE SCIENCE AND ENGINEERING
Volume 11, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/jmse11102017
Keywords
ocean surface waves; sea ice; marginal ice zone; wave attenuation; wave modeling
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This article introduces an alternative approach to accurately predict the attenuation of ocean surface waves in polar marginal ice zones. By representing the ice layer using a modified version of the vegetation damping parameterization in a phase-resolved wave model, the new representation is evaluated and compared to theory and measured data.
Accurate prediction of ocean surface wave attenuation in polar marginal ice zones remains a challenge. In this article, an alternative approach to the problem is introduced, in which the ice layer is represented with a modified version of the vegetation damping parameterization in a phase-resolved wave model. The new representation is evaluated by comparison to theory and measured data under varied wave and ice conditions. Model-estimated profiles of RMS water velocity and Reynolds stress under ice layers with different drag coefficients are found to be qualitatively comparable to a range of nondimensional profiles computed using viscous layer theory. Modeled profiles appear somewhat vertically stretched relative to theoretical results, and in this respect, they more closely resemble measurements obtained during a recent wave-ice laboratory experiment. Estimated values of the wave attenuation coefficient and wavenumber in ice from the adapted model align well with theory and with a range of lab and field datasets. Several additional model ice parameters are available to facilitate a more nuanced representation of surface ice effects and will be investigated further in an upcoming companion study.
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