A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics
Sea ice drift and deformation, namely sea ice dynamics, play a significant role in atmosphere–ice–ocean coupling. Deformation patterns in sea ice can be observed over a wide range of spatial and temporal scales, though high-resolution objective quantification of these features remains difficult. In...
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Online Access: | https://hdl.handle.net/10037/29933 https://doi.org/10.5194/tc-17-1545-2023 |
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ftunivtroemsoe:oai:munin.uit.no:10037/29933 2023-09-05T13:22:59+02:00 A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics Aksamit, Nikolas Olson Scharien, Randall K. Hutchings, Jennifer Lukovich, Jennifer 2023-04-11 https://hdl.handle.net/10037/29933 https://doi.org/10.5194/tc-17-1545-2023 eng eng Copernicus Publications The Cryosphere Aksamit NO, Scharien RK, Hutchings J, Lukovich. A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics. The Cryosphere. 2023;17:1545-1566 FRIDAID 2160828 doi:10.5194/tc-17-1545-2023 1994-0416 1994-0424 https://hdl.handle.net/10037/29933 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.5194/tc-17-1545-2023 2023-08-16T23:06:47Z Sea ice drift and deformation, namely sea ice dynamics, play a significant role in atmosphere–ice–ocean coupling. Deformation patterns in sea ice can be observed over a wide range of spatial and temporal scales, though high-resolution objective quantification of these features remains difficult. In an effort to better understand local deformation of sea ice, we adapt the trajectory-stretching exponents (TSEs), quasi-objective measures of Lagrangian stretching in continuous media, to sea ice buoy data and develop a temporal analysis of TSE time series. Our work expands on previous ocean current studies that have shown TSEs provide an approximation of Lagrangian coherent structure diagnostics when only sparse trajectory data are available. As TSEs do not require multiple buoys, we find they have an expanded range of use when compared with traditional Eulerian buoy-array deformation metrics and provide local-stretching information below the length scales possible when averaging over buoy arrays. We verify the ability of TSEs to temporally and spatially identify dynamic features for three different sea ice datasets. The ability of TSEs to quantify trajectory stretching is verified by concurrent ice fracture in buoy neighborhoods ranging from tens to hundreds of kilometers in diameter, as well as the temporal concurrence of significant storm events. Article in Journal/Newspaper Sea ice The Cryosphere University of Tromsø: Munin Open Research Archive The Cryosphere 17 4 1545 1566 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
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ftunivtroemsoe |
language |
English |
description |
Sea ice drift and deformation, namely sea ice dynamics, play a significant role in atmosphere–ice–ocean coupling. Deformation patterns in sea ice can be observed over a wide range of spatial and temporal scales, though high-resolution objective quantification of these features remains difficult. In an effort to better understand local deformation of sea ice, we adapt the trajectory-stretching exponents (TSEs), quasi-objective measures of Lagrangian stretching in continuous media, to sea ice buoy data and develop a temporal analysis of TSE time series. Our work expands on previous ocean current studies that have shown TSEs provide an approximation of Lagrangian coherent structure diagnostics when only sparse trajectory data are available. As TSEs do not require multiple buoys, we find they have an expanded range of use when compared with traditional Eulerian buoy-array deformation metrics and provide local-stretching information below the length scales possible when averaging over buoy arrays. We verify the ability of TSEs to temporally and spatially identify dynamic features for three different sea ice datasets. The ability of TSEs to quantify trajectory stretching is verified by concurrent ice fracture in buoy neighborhoods ranging from tens to hundreds of kilometers in diameter, as well as the temporal concurrence of significant storm events. |
format |
Article in Journal/Newspaper |
author |
Aksamit, Nikolas Olson Scharien, Randall K. Hutchings, Jennifer Lukovich, Jennifer |
spellingShingle |
Aksamit, Nikolas Olson Scharien, Randall K. Hutchings, Jennifer Lukovich, Jennifer A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics |
author_facet |
Aksamit, Nikolas Olson Scharien, Randall K. Hutchings, Jennifer Lukovich, Jennifer |
author_sort |
Aksamit, Nikolas Olson |
title |
A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics |
title_short |
A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics |
title_full |
A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics |
title_fullStr |
A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics |
title_full_unstemmed |
A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics |
title_sort |
quasi-objective single buoy approach for un- derstanding lagrangian coherent structures and sea ice dynamics |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/29933 https://doi.org/10.5194/tc-17-1545-2023 |
genre |
Sea ice The Cryosphere |
genre_facet |
Sea ice The Cryosphere |
op_relation |
The Cryosphere Aksamit NO, Scharien RK, Hutchings J, Lukovich. A quasi-objective single buoy approach for un- derstanding Lagrangian coherent structures and sea ice dynamics. The Cryosphere. 2023;17:1545-1566 FRIDAID 2160828 doi:10.5194/tc-17-1545-2023 1994-0416 1994-0424 https://hdl.handle.net/10037/29933 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.5194/tc-17-1545-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
4 |
container_start_page |
1545 |
op_container_end_page |
1566 |
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1776203559462764544 |