Journal article

Wave Attenuation by Sea Ice Turbulence

JJ Voermans, AV Babanin, J Thomson, MM Smith, HH Shen

Geophysical Research Letters | American Geophysical Union | Published : 2019

Abstract

The dissipation of wave energy in the marginal ice zone is often attributed to wave scattering and the dissipative mechanisms associated with the ice layer. In this study we present observations indicating that turbulence generated by the differential velocity between the sea ice cover and the orbital wave motion may be an important dissipative mechanism of wave energy. Through field measurements of under‐ice turbulence dissipation rates in pancake and frazil ice, it is shown that turbulence‐induced wave attenuation coefficients are in agreement with observed wave attenuation in the marginal ice zone. The results suggest that the turbulence‐induced attenuation rates can be parameterized by t..

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Grants

Awarded by DISI Australia-China Centre


Awarded by U.S. Office of Naval Research


Awarded by Office of Naval Research as part of the "Sea State and Boundary Layer Physics of the Emerging Arctic Ocean" Departmental Research Initiative


Funding Acknowledgements

This research was supported by the DISI Australia-China Centre through Grant ACSRF48199. A. V. B. acknowledges support from the U.S. Office of Naval Research Grant N00014-17-1-3021, and H. H. S. acknowledges support from the U.S. Office of Naval Research through Grant N00014-17-1-2862. Data used in this study were collected with the support of Office of Naval Research award N00014-13-1-0284, as part of the "Sea State and Boundary Layer Physics of the Emerging Arctic Ocean" Departmental Research Initiative. Data are available at the websites (www.apl.uw.edu/arcticseastate and hdl.handle.net/1773/41864). We would like to thank the anonymous reviewers