Ice bridges and ridges in the Maxwell-EB sea ice rheology
This paper presents a first implementation of a new rheological model for sea ice on geophysical scales. This continuum model, called Maxwell elasto-brittle (Maxwell-EB), is based on a Maxwell constitutive law, a progressive damage mechanism that is coupled to both the elastic modulus and appare...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-09-01
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| Series: | The Cryosphere |
| Online Access: | https://www.the-cryosphere.net/11/2033/2017/tc-11-2033-2017.pdf |
| _version_ | 1798045715026411520 |
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| author | V. Dansereau J. Weiss P. Saramito P. Lattes E. Coche |
| author_facet | V. Dansereau J. Weiss P. Saramito P. Lattes E. Coche |
| author_sort | V. Dansereau |
| collection | DOAJ |
| description | This paper presents a first implementation of a new rheological
model for sea ice on geophysical scales. This continuum model, called
Maxwell elasto-brittle (Maxwell-EB), is based on a Maxwell constitutive
law, a progressive damage mechanism that is coupled to both the elastic
modulus and apparent viscosity of the ice cover and a Mohr–Coulomb damage
criterion that allows for pure (uniaxial and biaxial) tensile strength. The
model is tested on the basis of its capability to reproduce the complex
mechanical and dynamical behaviour of sea ice drifting through a narrow
passage. Idealized as well as realistic simulations of the flow of ice
through Nares Strait are presented. These demonstrate that the model
reproduces the formation of stable ice bridges as well as the stoppage of the
flow, a phenomenon occurring within numerous channels of the Arctic. In
agreement with observations, the model captures the propagation of damage
along narrow arch-like kinematic features, the discontinuities in the
velocity field across these features dividing the ice cover into floes, the
strong spatial localization of the thickest, ridged ice, the presence of
landfast ice in bays and fjords and the opening of polynyas downstream of the
strait. The model represents various dynamical behaviours linked to an
overall weakening of the ice cover and to the shorter lifespan of ice
bridges, with implications in terms of increased ice export through narrow
outflow pathways of the Arctic. |
| first_indexed | 2024-04-11T23:25:45Z |
| format | Article |
| id | doaj.art-87ec1af4468c42a48c58b8b7e94d19a5 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-04-11T23:25:45Z |
| publishDate | 2017-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-87ec1af4468c42a48c58b8b7e94d19a52022-12-22T03:57:20ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242017-09-01112033205810.5194/tc-11-2033-2017Ice bridges and ridges in the Maxwell-EB sea ice rheologyV. Dansereau0J. Weiss1P. Saramito2P. Lattes3E. Coche4Institut des Sciences de la Terre, CNRS UMR 5275, Université de Grenoble, Grenoble, FranceInstitut des Sciences de la Terre, CNRS UMR 5275, Université de Grenoble, Grenoble, FranceLaboratoire Jean Kuntzmann, CNRS UMR 5224, Université de Grenoble, Grenoble, FranceTOTAL S.A. – DGEP/DEV/TEC/GEO, Paris, FranceTOTAL S.A. – DGEP/AF/CG-TEPCG/DBD/DDP/DMHB, Pointe Noire-Poincare, CongoThis paper presents a first implementation of a new rheological model for sea ice on geophysical scales. This continuum model, called Maxwell elasto-brittle (Maxwell-EB), is based on a Maxwell constitutive law, a progressive damage mechanism that is coupled to both the elastic modulus and apparent viscosity of the ice cover and a Mohr–Coulomb damage criterion that allows for pure (uniaxial and biaxial) tensile strength. The model is tested on the basis of its capability to reproduce the complex mechanical and dynamical behaviour of sea ice drifting through a narrow passage. Idealized as well as realistic simulations of the flow of ice through Nares Strait are presented. These demonstrate that the model reproduces the formation of stable ice bridges as well as the stoppage of the flow, a phenomenon occurring within numerous channels of the Arctic. In agreement with observations, the model captures the propagation of damage along narrow arch-like kinematic features, the discontinuities in the velocity field across these features dividing the ice cover into floes, the strong spatial localization of the thickest, ridged ice, the presence of landfast ice in bays and fjords and the opening of polynyas downstream of the strait. The model represents various dynamical behaviours linked to an overall weakening of the ice cover and to the shorter lifespan of ice bridges, with implications in terms of increased ice export through narrow outflow pathways of the Arctic.https://www.the-cryosphere.net/11/2033/2017/tc-11-2033-2017.pdf |
| spellingShingle | V. Dansereau J. Weiss P. Saramito P. Lattes E. Coche Ice bridges and ridges in the Maxwell-EB sea ice rheology The Cryosphere |
| title | Ice bridges and ridges in the Maxwell-EB sea ice rheology |
| title_full | Ice bridges and ridges in the Maxwell-EB sea ice rheology |
| title_fullStr | Ice bridges and ridges in the Maxwell-EB sea ice rheology |
| title_full_unstemmed | Ice bridges and ridges in the Maxwell-EB sea ice rheology |
| title_short | Ice bridges and ridges in the Maxwell-EB sea ice rheology |
| title_sort | ice bridges and ridges in the maxwell eb sea ice rheology |
| url | https://www.the-cryosphere.net/11/2033/2017/tc-11-2033-2017.pdf |
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