Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties

Despite its relevance for the Arctic climate and ecosystem, modeling sea-ice deformation, i.e., the opening, shearing, and ridging of sea ice, along linear kinematic features (LKFs) remains challenging, as the mechanical properties of sea ice are not yet fully understood. The intersection angles bet...

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Published in:The Cryosphere
Main Authors: Ringeisen, Damien, Hutter, Nils, Albedyll, Luisa
Format: Text
Language:English
Published: 2023
Subjects:
Online Access:https://doi.org/10.5194/tc-17-4047-2023
https://tc.copernicus.org/articles/17/4047/2023/
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spelling ftcopernicus:oai:publications.copernicus.org:tc108567 2023-10-25T01:35:08+02:00 Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties Ringeisen, Damien Hutter, Nils Albedyll, Luisa 2023-09-19 application/pdf https://doi.org/10.5194/tc-17-4047-2023 https://tc.copernicus.org/articles/17/4047/2023/ eng eng doi:10.5194/tc-17-4047-2023 https://tc.copernicus.org/articles/17/4047/2023/ eISSN: 1994-0424 Text 2023 ftcopernicus https://doi.org/10.5194/tc-17-4047-2023 2023-09-25T16:24:15Z Despite its relevance for the Arctic climate and ecosystem, modeling sea-ice deformation, i.e., the opening, shearing, and ridging of sea ice, along linear kinematic features (LKFs) remains challenging, as the mechanical properties of sea ice are not yet fully understood. The intersection angles between LKFs provide valuable information on the internal mechanical properties, as they are linked to them. Currently, the LKFs emerging from sea-ice rheological models do not reproduce the observed LKF intersection angles, pointing to a gap in the model physics. We aim to obtain an intersection angle distribution (IAD) from observational data to serve as a reference for high-resolution sea-ice models and to infer the mechanical properties of the sea-ice cover. We use the sea-ice vorticity to discriminate between acute and obtuse LKF intersection angles within two sea-ice deformation datasets: the RADARSAT Geophysical Processor System (RGPS) and a new dataset from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) drift experiment. Acute angles dominate the IAD, with single peaks at 48 ∘ ± 2 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="36pt" height="11pt" class="svg-formula" dspmath="mathimg" md5hash="c1a9d0503886105fac799ed27a80eccd"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-17-4047-2023-ie00001.svg" width="36pt" height="11pt" src="tc-17-4047-2023-ie00001.png"/></svg:svg> and 45 ∘ ± 7 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="36pt" height="11pt" class="svg-formula" dspmath="mathimg" md5hash="5e6dcfcbac01ed4a023a9396861d25bf"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-17-4047-2023-ie00002.svg" width="36pt" height="11pt" src="tc-17-4047-2023-ie00002.png"/></svg:svg> . The IAD agrees well between both datasets, despite the difference in scale, time period, and geographical location. The divergence and shear rates of the LKFs also have the same distribution. The dilatancy angle ... Text Arctic Sea ice Copernicus Publications: E-Journals Arctic The Cryosphere 17 9 4047 4061
institution Open Polar
collection Copernicus Publications: E-Journals
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language English
description Despite its relevance for the Arctic climate and ecosystem, modeling sea-ice deformation, i.e., the opening, shearing, and ridging of sea ice, along linear kinematic features (LKFs) remains challenging, as the mechanical properties of sea ice are not yet fully understood. The intersection angles between LKFs provide valuable information on the internal mechanical properties, as they are linked to them. Currently, the LKFs emerging from sea-ice rheological models do not reproduce the observed LKF intersection angles, pointing to a gap in the model physics. We aim to obtain an intersection angle distribution (IAD) from observational data to serve as a reference for high-resolution sea-ice models and to infer the mechanical properties of the sea-ice cover. We use the sea-ice vorticity to discriminate between acute and obtuse LKF intersection angles within two sea-ice deformation datasets: the RADARSAT Geophysical Processor System (RGPS) and a new dataset from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) drift experiment. Acute angles dominate the IAD, with single peaks at 48 ∘ ± 2 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="36pt" height="11pt" class="svg-formula" dspmath="mathimg" md5hash="c1a9d0503886105fac799ed27a80eccd"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-17-4047-2023-ie00001.svg" width="36pt" height="11pt" src="tc-17-4047-2023-ie00001.png"/></svg:svg> and 45 ∘ ± 7 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="36pt" height="11pt" class="svg-formula" dspmath="mathimg" md5hash="5e6dcfcbac01ed4a023a9396861d25bf"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-17-4047-2023-ie00002.svg" width="36pt" height="11pt" src="tc-17-4047-2023-ie00002.png"/></svg:svg> . The IAD agrees well between both datasets, despite the difference in scale, time period, and geographical location. The divergence and shear rates of the LKFs also have the same distribution. The dilatancy angle ...
format Text
author Ringeisen, Damien
Hutter, Nils
Albedyll, Luisa
spellingShingle Ringeisen, Damien
Hutter, Nils
Albedyll, Luisa
Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties
author_facet Ringeisen, Damien
Hutter, Nils
Albedyll, Luisa
author_sort Ringeisen, Damien
title Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties
title_short Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties
title_full Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties
title_fullStr Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties
title_full_unstemmed Deformation lines in Arctic sea ice: intersection angle distribution and mechanical properties
title_sort deformation lines in arctic sea ice: intersection angle distribution and mechanical properties
publishDate 2023
url https://doi.org/10.5194/tc-17-4047-2023
https://tc.copernicus.org/articles/17/4047/2023/
geographic Arctic
geographic_facet Arctic
genre Arctic
Sea ice
genre_facet Arctic
Sea ice
op_source eISSN: 1994-0424
op_relation doi:10.5194/tc-17-4047-2023
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