Movie 4 from Linking scales in sea ice mechanics
Mechanics plays a key role in the evolution of the sea ice cover through its control on drift, on momentum and thermal energy exchanges between the polar oceans and the atmosphere along cracks and faults, and on ice thickness distribution through opening and ridging processes. At the local scale, a...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
The Royal Society
2016
|
Subjects: | |
Online Access: | https://dx.doi.org/10.6084/m9.figshare.4244579 https://rs.figshare.com/articles/media/Movie_4_from_Linking_scales_in_sea_ice_mechanics/4244579 |
id |
ftdatacite:10.6084/m9.figshare.4244579 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.6084/m9.figshare.4244579 2023-05-15T18:16:39+02:00 Movie 4 from Linking scales in sea ice mechanics Weiss, Jérôme Dansereau, Véronique 2016 https://dx.doi.org/10.6084/m9.figshare.4244579 https://rs.figshare.com/articles/media/Movie_4_from_Linking_scales_in_sea_ice_mechanics/4244579 unknown The Royal Society https://dx.doi.org/10.1098/rsta.2015.0352 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Mechanics 40602 Glaciology FOS Earth and related environmental sciences article MediaObject Media Audiovisual 2016 ftdatacite https://doi.org/10.6084/m9.figshare.4244579 https://doi.org/10.1098/rsta.2015.0352 2021-11-05T12:55:41Z Mechanics plays a key role in the evolution of the sea ice cover through its control on drift, on momentum and thermal energy exchanges between the polar oceans and the atmosphere along cracks and faults, and on ice thickness distribution through opening and ridging processes. At the local scale, a significant variability of the mechanical strength is associated with the microstructural heterogeneity of saline ice, however, characterized by a small correlation length, below the ice thickness scale. Conversely, the sea ice mechanical fields (velocity, strain and stress) are characterized by long-ranged (more than 1000 km) and long-lasting (approx. few months) correlations. The associated space and time scaling laws are the signature of the brittle character of sea ice mechanics, with deformation resulting from a multi-scale accumulation of episodic fracturing and faulting events. To translate the short-range-correlated disorder on strength into long-range-correlated mechanical fields, several key ingredients are identified: long-ranged elastic interactions, slow driving conditions, a slow viscous-like relaxation of elastic stresses and a restoring/healing mechanism. These ingredients constrained the development of a new continuum mechanics modelling framework for the sea ice cover, called Maxwell-elasto-brittle. Idealized simulations without advection demonstrate that this rheological framework reproduces the main characteristics of sea ice mechanics, including anisotropy, spatial localization and intermittency, as well as the associated scaling laws. Article in Journal/Newspaper Sea ice DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Mechanics 40602 Glaciology FOS Earth and related environmental sciences |
spellingShingle |
Mechanics 40602 Glaciology FOS Earth and related environmental sciences Weiss, Jérôme Dansereau, Véronique Movie 4 from Linking scales in sea ice mechanics |
topic_facet |
Mechanics 40602 Glaciology FOS Earth and related environmental sciences |
description |
Mechanics plays a key role in the evolution of the sea ice cover through its control on drift, on momentum and thermal energy exchanges between the polar oceans and the atmosphere along cracks and faults, and on ice thickness distribution through opening and ridging processes. At the local scale, a significant variability of the mechanical strength is associated with the microstructural heterogeneity of saline ice, however, characterized by a small correlation length, below the ice thickness scale. Conversely, the sea ice mechanical fields (velocity, strain and stress) are characterized by long-ranged (more than 1000 km) and long-lasting (approx. few months) correlations. The associated space and time scaling laws are the signature of the brittle character of sea ice mechanics, with deformation resulting from a multi-scale accumulation of episodic fracturing and faulting events. To translate the short-range-correlated disorder on strength into long-range-correlated mechanical fields, several key ingredients are identified: long-ranged elastic interactions, slow driving conditions, a slow viscous-like relaxation of elastic stresses and a restoring/healing mechanism. These ingredients constrained the development of a new continuum mechanics modelling framework for the sea ice cover, called Maxwell-elasto-brittle. Idealized simulations without advection demonstrate that this rheological framework reproduces the main characteristics of sea ice mechanics, including anisotropy, spatial localization and intermittency, as well as the associated scaling laws. |
format |
Article in Journal/Newspaper |
author |
Weiss, Jérôme Dansereau, Véronique |
author_facet |
Weiss, Jérôme Dansereau, Véronique |
author_sort |
Weiss, Jérôme |
title |
Movie 4 from Linking scales in sea ice mechanics |
title_short |
Movie 4 from Linking scales in sea ice mechanics |
title_full |
Movie 4 from Linking scales in sea ice mechanics |
title_fullStr |
Movie 4 from Linking scales in sea ice mechanics |
title_full_unstemmed |
Movie 4 from Linking scales in sea ice mechanics |
title_sort |
movie 4 from linking scales in sea ice mechanics |
publisher |
The Royal Society |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.4244579 https://rs.figshare.com/articles/media/Movie_4_from_Linking_scales_in_sea_ice_mechanics/4244579 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://dx.doi.org/10.1098/rsta.2015.0352 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.4244579 https://doi.org/10.1098/rsta.2015.0352 |
_version_ |
1766190425353224192 |