Effects of sample size, centrifugal acceleration and brine inclusions on elastic modulus of sea ice
This paper presents an analysis of the results obtained from a series of measurements on freshwater and saline ice beams under various centrifugal accelerations. The data showed a strong influence of beam size, brine content and centrifugal acceleration on the elastic modulus of ice. The data sugges...
| Main Authors: | , , |
|---|---|
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
2008
|
| Subjects: | |
| Online Access: | https://nrc-publications.canada.ca/eng/view/ft/?id=a962a4d6-c269-42af-9604-ddf9c3a2da9d https://nrc-publications.canada.ca/eng/view/object/?id=a962a4d6-c269-42af-9604-ddf9c3a2da9d https://nrc-publications.canada.ca/fra/voir/objet/?id=a962a4d6-c269-42af-9604-ddf9c3a2da9d |
| Summary: | This paper presents an analysis of the results obtained from a series of measurements on freshwater and saline ice beams under various centrifugal accelerations. The data showed a strong influence of beam size, brine content and centrifugal acceleration on the elastic modulus of ice. The data suggested a transition brine volume at around 10%, which might occur close to the melting point, at which the elastic modulus of ice dropped rapidly due to a possible change of brine pocket structure. Furthermore, for brine volumes less than 10%, there was a negligible increase in the elastic modulus measured under high centrifugal accelerations, but for brine volumes greater than 10% the increase was considerable, approaching that measured with freshwater ice. This may be due to necking of brine drainage channels just above the ice/water interface at high centrifugal acceleration. A model of sea ice was constructed based on existing theories of brine inclusions in sea ice, which satisfactorily predicted the observed trends. Peer reviewed: Yes NRC publication: Yes |
|---|