Preliminary observations of Labrador Sea marginal ice zone rheology using C-band SAR
SAR imagery collected in the Labrador Sea during Limex '87 are used to interpret modes of sea-ice deformation. The ice canopy exhibited two distinct rheologies separated by a clear line of shear; a quasi-brittle inner regime and a nonlinear viscous outer regime. A single constitutive relation c...
| Main Authors: | , |
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| Language: | unknown |
| Published: |
1989
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| Online Access: | http://ntrs.nasa.gov/search.jsp?R=19910031085 |
| Summary: | SAR imagery collected in the Labrador Sea during Limex '87 are used to interpret modes of sea-ice deformation. The ice canopy exhibited two distinct rheologies separated by a clear line of shear; a quasi-brittle inner regime and a nonlinear viscous outer regime. A single constitutive relation capable of modeling both is unlikely within a plastic rate-independent formulation. Rate dependent effects are discussed as an explanation for brittle fracture in ductile materials. |
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