Laboratory experiments on internal solitary waves in ice-covered waters

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 di...

Full description

Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Carr, Magda, Sutherland, Peter, Haase, Andrea, Evers, Karl-Ulrich, Fer, Ilker, Jensen, Atle, Kalisch, Henrik, Berntsen, Jarle, Parau, Emilian, Thiem, Oyvind, Davies, Peter A.
Format: Article in Journal/Newspaper
Language:English
Published: 2019
Subjects:
Arctic
Arctic Ocean
Sea ice
ice covered waters
Online Access:https://ueaeprints.uea.ac.uk/id/eprint/72426/
https://ueaeprints.uea.ac.uk/id/eprint/72426/1/grl_v8.pdf
https://doi.org/10.1029/2019GL084710
Description
Summary: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.

Similar Items