Sea Ice Dynamics: The Role Of Broken Ice In Multi-scale Deformation

Realistic models of Arctic Ocean behaviour should capture the influence of broken ice acting as a fault gouge between sliding floes. We performed double-direct shear friction tests on floating saline ice floes in the HSVA ARCTECLAB, Large Model Basin, Hamburg. We have focused these experiments on an...

Full description

Bibliographic Details
Main Authors: Sammonds, P, Scourfield, S, Lishman, B, Shortt, M, Bailey, E, Marchenko, A
Other Authors: Henry, P-Y, Breteler, MK
Format: Report
Language:English
Published: Hydralab+ 2019
Subjects:
Arctic
Arctic Ocean
Sea ice
Online Access:https://discovery.ucl.ac.uk/id/eprint/10074788/1/Sammonds%20Sea%20Ice%20Dynamics.pdf
https://discovery.ucl.ac.uk/id/eprint/10074788/
Description
Summary:Realistic models of Arctic Ocean behaviour should capture the influence of broken ice acting as a fault gouge between sliding floes. We performed double-direct shear friction tests on floating saline ice floes in the HSVA ARCTECLAB, Large Model Basin, Hamburg. We have focused these experiments on angularity and size to determine fault gouge characteristics. In our experiments the displacements and deformation of ice gouge were characterized during on-going frictional slip for the first time. Both stable sliding and stickslip behaviour were displayed. It appears that there are controls on behaviour according to gouge angularity. By measuring local stress, strain and acoustic emissions along the sliding interfacial fault we have captured the mechanics of the propagation of slip from slip initiation to dynamic propagation for the first time in the presence of broken ice.

Similar Items