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Laboratory Experiments on Internal Solitary Waves in Ice-Covered Waters

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Authors

  • Magda Carr
  • Peter Sutherland
  • Andrea Haase
  • Karl-Ulrich Evers
  • Ilker Fer
  • Atle Jensen
  • Henrik Kalisch
  • Jarle Berntsen
  • Emilian Parau
  • Oyvind Thiem
  • Peter A. Davies

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Abstract

Internal solitary waves (ISWs) propagating in a stably-stratified two-layer fluid in which the upper boundary condition changes from open water to ice are studied for cases of grease, level and nilas ice. The ISW-induced current at the surface is capable of trans-porting the ice in the horizontal direction. In the level ice case, the transport speed of, relatively long ice floes, non-dimensionalised by the wave speed is linearly dependent on the length of the ice floe non-dimensionalised by the wave length. Measures of turbulent kinetic energy dissipation under the ice are comparable to those at the wave density interface. Moreover, in cases where the ice floe protrudes into the pycnocline, interaction with the ice edge can cause the ISW to break or even be destroyed by the process. The results suggest that interaction between ISWs and sea ice may be an important mechanism for dissipation of ISW energy in the Arctic Ocean.

Details

Original languageEnglish
Pages (from-to)12230-12238
JournalGeophysical Research Letters
Volume46
Issue number21
Early online date15 Oct 2019
DOIs
Publication statusPublished - 16 Nov 2019
Peer-reviewedYes

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