- Title
- Relating wave attenuation to pancake ice thickness, using field measurements and model results
- Creator
- Doble, Martin J.; De Carolis, Giacomo; Meylan, Michael H.; Bidlot, Jean-Raymond; Wadhams, Peter
- Relation
- Geophysical Research Letters Vol. 42, Issue 11, p. 4473-4481
- Publisher Link
- http://dx.doi.org/10.1002/2015GL063628
- Publisher
- American Geophysical Union
- Resource Type
- journal article
- Date
- 2015
- Description
- Wave attenuation coefficients (a, m-1) were calculated from in situ data transmitted by custom wave buoys deployed into the advancing pancake ice region of the Weddell Sea. Data cover a 12day period as the buoy array was first compressed and then dilated under the influence of a passing low-pressure system. Attenuation was found to vary over more than 2 orders of magnitude and to be far higher than that observed in broken-floe marginal ice zones. A clear linear relation between a and ice thickness was demonstrated, using ice thickness from a novel dynamic/thermodynamic model. A simple expression for a in terms of wave period and ice thickness was derived, for application in research and operational models. The variation of a was further investigated with a two-layer viscous model, and a linear relation was found between eddy viscosity in the sub-ice boundary layer and ice thickness.
- Subject
- Wave attenuation coefficient; ice thickness; Weddell Sea; pancake ice
- Identifier
- http://hdl.handle.net/1959.13/1339328
- Identifier
- uon:28230
- Identifier
- ISSN:0094-8276
- Rights
- ©2015. American Geophysical Union. All Rights Reserved.
- Language
- eng
- Full Text
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